There should probably be a space there.

Are you sure it's my mod that adds that text? Because DurabilityViewer doesn't put a colon there at all. And also, the blue Minecraft is from some other mod. Which other mods are you using, and is that the Forge or Fabric version?

Hi! I'm using Forge, and the other text is from Hwyla.
I'm using color option 7.
I can confirm it happens with no other mods.