From color theory , there are also other topics in relation to colors that you might want to look at . I’m not sure which one you are especially keen in but I think that books that specialize in one topic at a time will be good , as there will be more details and things like that . Just to share a few good color books that I’ve got in mind :
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1) Color Studies by Edith Anderson Feisner
(# ISBN-10: 1563673940 / # ISBN-13: 978–1563673948)
This book was good for me when I wanted some information on color symbolism I pretty much got hold of some good information from this book . This book also touches on physiology and psychology of color perception and other interesting topics .
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2) Color – Messages & Meanings: A PANTONE Color Resource by Leatrice Eiseman
(# ISBN-10: 0971401063 / # ISBN-13: 978–0971401068)
As others have recommended Pantone , I agree that it is a good topic for you to look into when going into color studies . This book is good as it gives you information on how you can make effective color choices and combinations in order to give out the right communicating moods (color moods , yay !) It also gives you some essential information on colors as well as charts for converting PANTONE solid ink colors to four-color process (CMYK) .
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3)The Complete Color Harmony Workbook by Kiki Eldridge
If you are going to work with colors for a while , this book is going to be good for you ! This book has that color swatches that you can tear out and hands-on color advice. There are also some information on new metallic and fluorescent color inspiration , which is pretty useful if you were to use such colors for your works and would like to see how to work with them .
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That’s all I’ve got for now , the 3 best books in my opinion . I’ll add in more to the list if I’ve got more ! (=