- coolors.co
- colorschemedesigner.com
- speckyboy.com
- w2products.com · pantone styled products
- kuler.adobe.com
- answers.com
- december.com
- webreference.com · print method to extract duotone channels into CMYK channels (easier for printers at times)
- color-wheel-pro.com
- photo.net
- northlight-images.co.uk
- northlight-images.co.uk
- chameleon.simplebits.com
- colorschemer.com
- colourmod.com
- colourlovers.com
- colourlovers.com
- colorcombos.com
- rpimaging.com
- pantoneuniverse.com
- pantone.com
- pantone.com
- colorwhore.com
- ficml.org
- infohound.net
- webwhirlers.com