No thats not the way to make signatures dude. So let me give you few tips to help you here.
You use brushes to color parts of the signature right? well, thats not too graphical.
Now what can you do to improve this signature?..
1- border? yes that would localize your signature. As the bkg is monochromal (grey scale color).
2- effects? yes try add some effects (light, shadow, c4D brushing, blending, transparency and opacity, etc..).
3- Text should be atleast have some color similarity... green? grey background and green text? nah.. try maron text instead. imo.
4- Never do this "color brushing" over the psd. Use gradients and color balance options instead. This will make your signature flow better with every part.