80s Bright Yellow/dirty Texture

Since I can't find a 1024x768 80s/bright/yellow texture so I decided to make one. I can't seem to make them look like these icons below. They always seem to look crappy. Is it possible to find a texture to get that dirty look on tops of a yellow texture? When I put a texture on top of the yellow it always changes the color to like orange. Is the only way to use a brush to get that old/dirty effect? I tried that also & I suck at it. Advice anyone?


Texture #1 indienotebook
Texture #2 urbanstrokes