This has been driving me a bit buggy lately when I noticed it, here's the steps to reproduce:
1. Set some crazy primary colors on your color gun for your base color. (I'm using an orange yellow with a white secondary)
2. Place some gates side-by-side and next to a wall for comparison. Specifically a few Gate 8x4's on foundations.Anything looking a bit off yet?
3. Out of the gates you just made, use the dismantle gun to HIGHLIGHT one of the gates you placed. Don't dismantle it Important! - DON'T HIGHLIGHT THE OTHER GATES. JUST ONE!
4. Put away your dismantle gun by switching to another tool and inspect the colors of the one you highlighted versus the walls and gates that did not get highlighted.
What's going on? = The colors of only the gates seem to spawn in with a dull primary color, other wall types don't appear affected. Once you highlight the gate with the dismantle gun, it updates to the correct paint gun color.
Is your OCD triggered yet? This also persists between sessions. Now run around and highlight everything with the dismantle tool to get your correct colors back.