Turns out you can't use Hex Codes for Eye Colours so I only got the RGB Values. First Picture is Before and Second is after. I only tested 8 Colours:
Green, Blue, Light Pink, White, Black, Yellow, Red and a Turquoise.
Most were set to the Brightest. The same Model was used 8 Times.
Number 1 - Green (R -136, G - 255, B - 125)
Number 2 - Blue (R - 72, G - 180, B - 255)
Number 3 - Light Pink (R - 255, G - 176, B - 191)
Number 4 - White (R - 255, G - 255, B - 255)
Number 5 - Black (R - 0, G - 0, B - 0)
Number 6 - Yellow (R - 255, G - 220, B - 80 )
Number 7 - Red (R - 255, G - 34, B - 95)
Number 8 - Turquoise (R - 0, G - 253, B - 255)
Number 5 who had Black Eyes didn't change much at all but the others really did get brighter. I think after that my favourites are the Turquoise, Blue, Green and White. The Vampire Eyes are awesome!