minor spelling mistake

What is a colourblind challenge?

Where you work with colour, but you're soft proofing in greyscale?

(spelled colorbling challange at first lol)

It's when you get yourself a palette of colors, often at random, and then set your monitor to greyscale, so you can't see them. Then you get a liquify tool and mix your palette up so you don't know which colors where. And then you paint the piece entirely in greyscale using this palette, only turning the color back on when it's finished.

Oh, yeah, I saw Marco Bucci video about that.

I've never tried it myself, tho. :P

shy does every one of these look sci-fi ish

Vibrant blues and cyans are very sci-fi colors