I make my own fondant and color it with wiltons colors. My question is my fondant is fine before i color it after i color it , its way to soft!
Am i doing something wrong? Could it be the wilton products? It mostly happend when i have to use alot of color like red or black. It's driving me crazy! Are there better products to use for coloring?

Americolor gels seem to perform better. You still need to add a lot of coloring to get red. If you add the color as part of the liquid, or compensate for the added moisture by adding some additional powdered sugar and cornstarch, it should help.

I have found that taking a small ball of fondant and coloring it first very dark then working it into your larger ball it seems to color faster without as much paste.

any large amount of paste will soften your fondant regardless of the brand, particularly red or black. try making dark pink or dark green respectively first and then adding the red or black if you want to use gells.
the best for coloring fondant these colors is powder color, you dont need as much.
Alternativly buy them premade.