The color changing silks is a classic effect. The magician push one silk into his hand and it changes color. The gimmick in use is known as a dye tube. I have been using dye tubes for all my magical career and as with all gimmicks, there were always compromises. In the best of worlds the gimmick should:
I finally made it. Using my large diamond cut silks and a special made dye tube, I meet all my requirements. Specify the color you like. Choose between White, Red, Green, Blue
Here is what you get:
The special dye tube
2 diamond cut silks.
Video instructions.