@fujiwara, shim13
Thank you for your comment, I tried, but something went wrong in the process.
As you can see this is the diffuse texture
and color mask
and this is the result
I don't know what's the problem. I cut the color part I want to paint to new layer in photoshop and fill it with red,green,blue then merge them down, and save ass dds.
Update, after paint white the blue and yellow part in the diffuse I have the color I want but the chest armor, which I don't want to have color mask is still broken.