what pad is it? I would be VERY careful about trying to dye it.
1. The dye may not take to the material and stain the logo/print beyond repair.
2. The logo/print may lift off the pad. (I stupidly put a skyway T/A bar pad in the washing machine and the whole print lifted. Result = pad ruined).
If it's black, you could: Get some Tamiya acrylic paint and go over all the black parts. It doesn't run when it rains/ gets wet (I've tried it).
The writing on these Falcon Pro pads was very faded when I got them, so i carefully went over the writing in blue acryllic, and they look like new.
The type of paint I used: