Yeah, I had originally designed Lucas to look like there was a blue light shining on him from below as kind of an homage to PK freeze but then I saw that someone had mistaken the blue light reflecting off the bottom of his nose as a little grin.  I've changed the color of the bottom of his nose.  That's all the time I'm going to put into it.

-Bill

I use Adobe Illustrator.  The images you see here are just jpegs.  You'd need to get the original Illustrator file from me and edit them in AI to get the best results with color changes.  I'm not quite sure if I want to release my source files though.

-Bill

It does make things a little difficult when limitations like a 3 hue monochromatic color scheme are put into place but when we have a finished product, they'll be more professional looking.  

Going off the linked site that was provided didn't seem all that intuitive to me, but if you want to set your blues on the RGB slider bar in your image editing program, here are the values.

Dark Blue:
R: 18
G: 55
B: 91

Medium Blue:
R: 65
G: 117
B: 168

Dark Blue:
R: 175
G: 201
B: 228