I think that this crash is created more by the ExtraUtilities side of the problem, but maybe you have some insight into why this would be happening. There is one older ExtraUtilities version where the two mods work together but all the newer versions crash when I put them together. Sorry that the crash report isn't concealed in one of those drop down menus, I don't know how to do it. Here is the crash report:

---- Minecraft Crash Report ----

WARNING: coremods are present:
MalisisCorePlugin (malisiscore-1.10.2-4.2.9 (1).jar)
LoadingPlugin (RandomThings-MC1.10.2-3.7.7.jar)
CoreMod (Aroma1997Core-1.9.4-1.1.1.0.jar)
FMLPlugin (InventoryTweaks-1.61-58.jar)
ShetiPhian-ASM (shetiphiancore-1.10.0-3.3.5.jar)
Contact their authors BEFORE contacting forge

// Would you like a cupcake?

Time: 1/1/17 3:15 PM
Description: Initializing game

java.lang.IllegalAccessError: tried to access method net.minecraft.client.renderer.texture.TextureAtlasSprite.func_147962_a([[IIII)[[I from class com.rwtema.extrautils2.textures.SpriteLoader
at com.rwtema.extrautils2.textures.SpriteLoader.loadSprite(SpriteLoader.java:88)
at com.rwtema.extrautils2.textures.SpriteLoaderProcessing.load(SpriteLoaderProcessing.java:59)
at net.minecraft.client.renderer.texture.TextureMap.func_110571_b(TextureMap.java:205)
at net.minecraft.client.renderer.texture.TextureMap.func_174943_a(TextureMap.java:149)
at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:155)
at net.minecraft.client.renderer.block.model.ModelManager.func_110549_a(ModelManager.java:28)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110544_b(SimpleReloadableResourceManager.java:132)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110541_a(SimpleReloadableResourceManager.java:113)
at net.minecraft.client.Minecraft.func_110436_a(Minecraft.java:755)
at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:340)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:520)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:351)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Client thread
Stacktrace:
at com.rwtema.extrautils2.textures.SpriteLoader.loadSprite(SpriteLoader.java:88)
at com.rwtema.extrautils2.textures.SpriteLoaderProcessing.load(SpriteLoaderProcessing.java:59)
at net.minecraft.client.renderer.texture.TextureMap.func_110571_b(TextureMap.java:205)
at net.minecraft.client.renderer.texture.TextureMap.func_174943_a(TextureMap.java:149)
at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:155)
at net.minecraft.client.renderer.block.model.ModelManager.func_110549_a(ModelManager.java:28)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110544_b(SimpleReloadableResourceManager.java:132)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110541_a(SimpleReloadableResourceManager.java:113)
at net.minecraft.client.Minecraft.func_110436_a(Minecraft.java:755)
at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:340)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:520)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:351)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
Minecraft Version: 1.10.2
Operating System: Mac OS X (x86_64) version 10.12.2
Java Version: 1.8.0_74, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1333977368 bytes (1272 MB) / 3173466112 bytes (3026 MB) up to 4241293312 bytes (4044 MB)
JVM Flags: 5 total; -Xmx4G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn512M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.32 Powered by Forge 12.18.3.2185 Optifine OptiFine_1.10.2_HD_U_D4 69 mods loaded, 69 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJA mcp{9.19} [Minecraft Coder Pack] (minecraft.jar)
UCHIJA FML{8.0.99.99} [Forge Mod Loader] (forge-1.10.2-12.18.3.2185.jar)
UCHIJA Forge{12.18.3.2185} [Minecraft Forge] (forge-1.10.2-12.18.3.2185.jar)
UCHIJA Aroma1997Core{${version}} [Aroma1997Core] (Aroma1997Core-1.9.4-1.1.1.0.jar)
UCHIJA mercurius_updater{1.0} [mercurius_updater] (MercuriusUpdater-1.10.2.jar)
UCHIJA mantle{1.10.2-1.1.3.199} [Mantle] (Mantle-1.10.2-1.1.3.jar)
UCHIJA JEI{3.13.6.393} [Just Enough Items] (jei_1.10.2-3.13.6.393.jar)
UCHIJA tconstruct{1.10.2-2.6.1.464} [Tinkers' Construct] (TConstruct-1.10.2-2.6.1.jar)
UCHIJA thedragonlib{1.10.2-1.0.3.0} [TheDragonLib] (thedragonlib-1.10.2-1.0.3.0.jar)
UCHIJA armorplus{1.10.2-8.2.2.3} [ArmorPlus] (armorplus-1.10.2-8.2.2.3.jar)
UCHIJA Aroma1997CoreHelper{1.1.1.0} [Aroma1997Core|Helper] (Aroma1997Core-1.9.4-1.1.1.0.jar)
UCHIJA AromaBackup{1.0.1.1} [AromaBackup] (AromaBackup-1.9.4-1.0.1.1.jar)
UCHIJA AromaBackupRecovery{1.0} [AromaBackup Recovery] (AromaBackup-1.9.4-1.0.1.1.jar)
UCHIJA basemetals{2.4.0} [Base Metals] (BaseMetals_1.10.2-2.4.0.11-EDIT.jar)
UCHIJA BiomesOPlenty{5.0.0.2089} [Biomes O' Plenty] (BiomesOPlenty-1.10.2-5.0.0.2089-EDIT-universal.jar)
UCHIJA Chameleon{1.10-2.2.2} [Chameleon] (Chameleon-1.10-2.2.2.jar)
UCHIJA craftablehorsearmour{1.2} [Craftable Horse Armour [CHA&S]] (CraftableHorseArmor-1.3.0-1.10.jar)
UCHIJA craftablenametags{1.2} [Craftable Name Tags] (craftablenametags-1.2.jar)
UCHIJA customspawner{3.10.1} [DrZhark's CustomSpawner] (CustomMobSpawner 3.10.1.jar)
UCHIJA cutepuppymod{1.1} [CutePuppyMod] (CutePuppyMod-1.10.2-1.1.jar)
UCHIJA PTRModelLib{1.0.0} [PTRModelLib] (Decocraft-2.3.6.1_1.10.2.jar)
UCHIJA props{2.3.6.1} [Decocraft] (Decocraft-2.3.6.1_1.10.2.jar)
UCHIJA DragonMounts{r46-1.10.2} [Dragon Mounts] (DragonMounts-r46-1.10.2.jar)
UCHIJA mocreatures{10.0.6} [DrZhark's Mo'Creatures Mod] (DrZhark's Mo'Creatures Mod-10.0.6.jar)
UCHIJA earthlifemod{0.4} [Earth Life] (EarthLife-0.4a.jar)
UCHIJA elevatorid{1.3.0} [Elevator Mod] (ElevatorMod[V.1.3.0][MC.1.10.2].jar)
UCHIJA excore{1.6.2} [EXCore] (Excore-1.6.2-1.10.2.jar)
UCHIJA ExtraUtils2{1.0} [ExtraUtils2] (extrautils2-1.10.2-1.1.3c.jar)
UCHIJA ezstorage{2.2.6} [EZStorage 2] (ezstorage-2.2.6.jar)
UCHIJA FastLeaveDecay{1.1} [Fast Leave Decay] (FastLeaveDecay-MC1.10.2-1.2.2.jar)
UCHIJA flatcoloredblocks{mc1.10-v4.4} [Flat Colored Blocks] (flatcoloredblocks-mc1.10-v4.4.jar)
UCHIJA InventoryPets{1.4.8.2} [Inventory Pets] (inventorypets-1.10-1.4.8.2.jar)
UCHIJA inventorytweaks{1.61-58-a1fd884} [Inventory Tweaks] (InventoryTweaks-1.61-58.jar)
UCHIJA jlgm_caod{1.10.2-0.1.0-hotfixOfTheHotfix} [Cock-an-ore-doo] (jlgm_caod-1.10.2-0.1.0-hotfixOfTheHotfix.jar)
UCHIJA journeymap{1.10.2-5.3.2} [JourneyMap] (journeymap-1.10.2-5.3.2.jar)
UCHIJA lucky{7.3.0} [Lucky Block] (LuckyBlock_1-10-2_v7-3-0.zip)
UCHIJA malisiscore{1.10.2-4.2.9} [MalisisCore] (malisiscore-1.10.2-4.2.9 (1).jar)
UCHIJA malisisblocks{1.10.2-4.1.3} [Malisis Blocks] (malisisblocks-1.10.2-4.1.3.jar)
UCHIJA malisisdoors{1.10.2-5.1.6} [MalisisDoors] (malisisdoors-1.10.2-5.1.6 (1).jar)
UCHIJA RadixCore{1.10.2-2.1.3} [RadixCore] (RadixCore-1.10.2-2.1.3-universal.jar)
UCHIJA MCA{1.10.2-5.2.3} [Minecraft Comes Alive] (MCA-1.10.2-5.2.3-universal-EDIT.jar)
UCHIJA shear{1.1.2} [More Shearables] (MoreShearables1.2.1-1.10.2.jar)
UCHIJA shetiphiancore{3.3.5} [ShetiPhian-Core] (shetiphiancore-1.10.0-3.3.5.jar)
UCHIJA multibeds{1.2.3} [Multi-Beds] (multibeds-1.10.0-1.2.3.jar)
UCHIJA orespawn{1.1.0} [Ore Spawn] (OreSpawn_1.10.2-1.1.0.jar)
UCHIJA harvestcraft{1.9.4-1.10.2g} [Pam's HarvestCraft] (Pam's HarvestCraft 1.9.4-1.10.2h.jar)
UCHIJA platforms{1.2.7} [Platforms] (platforms-1.10.0-1.2.7.jar)
UCHIJA ProjectE{1.10.2-PE1.0.6B} [ProjectE] (ProjectE-1.10.2-PE1.0.6B.jar)
UCHIJA randomthings{3.7.7} [Random Things] (RandomThings-MC1.10.2-3.7.7.jar)
UCHIJA SimpleDimensions{1.3} [Simple Dimensions] (SimpleDimensions-MC1.10-1.3.jar)
UCHIJA slabcraftmod{6.03} [Slabcraft] (Slabcraftmod v6.03 - MC1.10.2 Forge (1).jar)
UCHIJA SophisticatedWolves{3.6.1} [SophisticatedWolves] (sophistacedwolves 3.6.3-EDIT-other copy.jar)
UCHIJA spawnercraft{3.1} [SpawnerCraft] (SpawnerCraft 1.10.2-3.2.0.jar)
UCHIJA staircraftmod{6.02} [Staircraft] (Staircraftmod v6.02 - MC1.10.2 Forge.jar)
UCHIJA StorageDrawers{1.10.2-3.5.16} [Storage Drawers] (StorageDrawers-1.10.2-3.5.16.jar)
UCHIJA lteleporters{1.1.3} [Lemon's Simple Teleporters] (teleporters-1.1.3.jar)
UCHIJA thedragoncore{1.1.0} [TheDragonCore] (thedragoncore-1.1.0.jar)
UCHIJA thutcore{3.11.1} [ThutCore] (thutcore-3.11.1.jar)
UCHIJA thuttech{@Version@} [Thut's Tech] (thuttech-4.0.10.b.jar)
UCHIJA TinkersAddons{1.0.3} [Tinkers' Addons] (Tinkers' Addons-1.10.x-1.0.3.jar)
UCHIJA tinkertoolleveling{1.10.2-0.1.0.DEV.b5240c7} [Tinkers Tool Leveling] (TinkerToolLeveling-1.10.2-0.1.0.jar)
UCHIJA treegrowingsimulator{0.0.4} [Tree Growing Simulator 2016] (TreeGrowingSimulator2016-0.0.4.jar)
UCHIJA VeinMiner{0.35.3_1.9-a46c1b0} [Vein Miner] (VeinMiner-1.9-0.35.3.595+a46c1b0.jar)
UCHIJA VeinMinerModSupport{0.35.3_1.9-a46c1b0} [Mod Support] (VeinMiner-1.9-0.35.3.595+a46c1b0.jar)
UCHIJA WailaHarvestability{1.1.9} [Waila Harvestability] (WailaHarvestability-mc1.10.2-1.1.9.jar)
UCHIJA icse{1.1.0.0} [I Can See Everything] (Wawla-1.10.2-2.3.1.212.jar)
UCHIJA wawla{2.3.1.212} [What Are We Looking At] (Wawla-1.10.2-2.3.1.212.jar)
UCHIJA worldedit{6.1.3} [WorldEdit] (worldedit-forge-mc1.9.4-6.1.3-dist.jar)
UCHIJA WorldEditCuiFe{1.0.2} [WorldEdit CUI Forge Edition] (WorldEditCuiFe-v1.0.6-mf-1.10.2-12.18.2.2125.jar)
Loaded coremods (and transformers):
MalisisCorePlugin (malisiscore-1.10.2-4.2.9 (1).jar)
net.malisis.core.util.chunkcollision.ChunkCollisionTransformer
net.malisis.core.util.chunkblock.ChunkBlockTransformer
net.malisis.core.renderer.transformer.MalisisRendererTransformer
net.malisis.core.renderer.icon.asm.TextureMapTransformer
net.malisis.core.util.clientnotif.ClientNotifTransformer
LoadingPlugin (RandomThings-MC1.10.2-3.7.7.jar)
lumien.randomthings.asm.ClassTransformer
CoreMod (Aroma1997Core-1.9.4-1.1.1.0.jar)

FMLPlugin (InventoryTweaks-1.61-58.jar)
invtweaks.forge.asm.ContainerTransformer
ShetiPhian-ASM (shetiphiancore-1.10.0-3.3.5.jar)
shetiphian.core.asm.ClassTransformer
Pulsar/tconstruct loaded Pulses:
- TinkerCommons (Enabled/Forced)
- TinkerWorld (Enabled/Not Forced)
- TinkerTools (Enabled/Not Forced)
- TinkerHarvestTools (Enabled/Forced)
- TinkerMeleeWeapons (Enabled/Forced)
- TinkerRangedWeapons (Enabled/Forced)
- TinkerModifiers (Enabled/Forced)
- TinkerSmeltery (Enabled/Not Forced)
- TinkerGadgets (Enabled/Not Forced)
- TinkerOredict (Enabled/Forced)
- TinkerIntegration (Enabled/Forced)
- TinkerFluids (Enabled/Forced)
- TinkerMaterials (Enabled/Forced)
- TinkerModelRegister (Enabled/Forced)

Launched Version: 1.10.2-forge1.10.2-12.18.3.2185
LWJGL: 2.9.2
OpenGL: Intel(R) Iris(TM) Graphics 6100 GL version 2.1 INTEL-10.22.25, Intel Inc.
GL Caps: Using GL 1.3 multitexturing.

Using GL 1.3 texture combiners.
Using framebuffer objects because ARB_framebuffer_object is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: Everthing-EDIT, Glass CT add on-1.10
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i5-5257U CPU @ 2.70GHz
OptiFine Version: OptiFine_1.10.2_HD_U_D4
Render Distance Chunks: 6
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: (internal)
OpenGlVersion: 2.1 INTEL-10.22.25
OpenGlRenderer: Intel(R) Iris(TM) Graphics 6100
OpenGlVendor: Intel Inc.
CpuCount: 4

I'm afraid I have no idea why extra utilities texture loader would be crashing with FlatColoredBlocks, it seems like its calling a method that is private, so maybe that has to do with it?

Flat Colored Blocks doesn't reflect, or transform any fields or methods, so i don't really have any insight into what might cause an issue when both mods are installed.

Yeah. Thanks for the quick response. Extra Utilities just started crashing a bunch for reasons that make no sense as I was trying to solve this problem and I am beginning to think there is just something weird about the mod that just gets messed up whenever I update it. Sorry to bother with a problem that seems like it really doesn't apply to you. Flat colored blocks is a great mod and I really love it so keep up the good work!