We spoke a lot about advanced colour theory during my recent livestream (check the VoD on FB or YT if you missed it), and one aspect I mentioned was how we as photographers need to be using both the regular (subtractive) colour wheel as well as the lighting (additive) colour wheel. We should use the regular colour wheel to choose our colours based on popular colour theory, but we should then check our lighting colour wheel to see how those chosen coloured lights will mix, as they can often create unexpected colours, or worse, they can neutralise one another resulting in ugly colour banding issues.
This is clearly a substantial topic and one that I've been learning/fighting with for many, many years. What I'm sharing with you today is a simple coloured light mixing cheat-sheet. This is actually just one page from my new courses workbook and that book is currently at about 40+ pages already with plenty more to go!
Again, this is a dense topic to dig into given just how incredibly subjective colour is to each of us, but understanding how different coloured lights will mix on set is (in my opinion) fundamental knowledge for anyone wanting to get into supplemental lighting like this.
I'll keep the core of this for my new course, but I'll leave you with a few key points to take from this cheat-sheet. Be very wary of using complimentary colours alongside one another. For example, red and green light will bizarrely make yellow light and yellow mixed with violet will neutralise to make 'grey' light, just like orange and blue does.
Lastly, the one wild card that I've found odd, is how hard it is to make orange light. Orange is the black sheep of the rainbow it would seem as its surprisingly tricky to make, plus it acts in odd ways when mixed with other colours. You can't see it here, but you can make a version of orange with red and yellow light, but the more common method is red and green, with a heavy bias towards the red.
Again, I won't go into it here, but colour is very subjective, even to the extent that there are people who believe the colour brown doesn't technically exist.... or is it orange that doesn't exist?!
Colour is always a fascinating topic for me and I very much look forward to sharing my new course with you all once its written and finalised. I think it already has some great teaching moments as well as fantastic setups to share, but I'll keep you posted.