Suomen Akvarellitaiteen yhdistys ry (SAy) https://akvarellitaiteenyhdistys.fi

http://www.akvart.fi

http://akvarellen.org

Best artificial light an artist can get! https://lumeline.com/en/

https://guerrillapainter.com

Websites for artists. Made easy. http://www.JacksonsArtSites.com

The UK’s best range of art materials, delivered world-wide. http://www.jacksonsart.com

Pigment database for pigment nerds... http://www.artiscreation.com/Color_index_names.html#.XJHpQS2B2WY