Because the book contains thousands of combinations, it acts less like a rulebook and more like a visual thesaurus. You look up a mood (e.g., "quiet autumn"), and you find the combination you didn't know you needed.
The original 1930 edition of Haishoku Soukan is in the in Japan and most countries that follow the "70 years after the author's death" rule (Sanzo Wada died in 1967). Therefore, the raw scans of the 1930 book are legally free to share and download. A Dictionary Of Color Combinations Pdf Free Download