BELLE NORTHRUP’S 4 YIN YANG COLOR TONAL GROUPS (clear bright tints/pastel/dark and dull/bright hues)
(Belle Northrup in Harriet McJimsey 1958 edition pg100-103)
The Yin Yang color tonal group instructions are tools for creating 4 specific psychological effects: Quiet Yin, Active Yin, Reserved Yang, or Active Yang. For each of the 4 psychological effects, she gives: color tonal groups, level of value contrast (high or low), what combinations of colors (complementary, monochromatic, etc), what neutrals, what specific hues, etc. see the book.
ACTIVE YIN=====”clear bright tints…”
QUIET YIN======”pastel hues…”
RESERVED YANG==”dark and dull colors…”
ACTIVE YANG====”bright hues…”

ANGELA WRIGHT – THE BEGINNER’S GUIDE TO COLOUR PSYCHOLOGY [1995] – intense means Yang and light means Yin
Spring/Type 1 – “externally motivated & light”
Summer/Type 2 – “internally motivated & light”
Autumn/Type 3 – “externally motivated & more intense”
Winter/Type 4 – “internally motivated & intense”

HOW TO USE BELLE NORTHRUP’S 4 YIN YANG COLOR TONAL GROUPS
Yin Yang color groups are separated in the book from Yin Yang typing. Although the 4 Yin Yang color groups appear to align with the 4 extreme Yin Yang types (Active Yang color with Dramatic type/Reserved Yang color with Athletic type/Active Yin color with Gamin type/Quiet Yin color with Ingenue type), she doesn’t tell us to pair the Yin Yang color groups automatically with the Yin Yang style types. Instead, she advises that people should look at how much contrast they have in their personal coloring and advises whether to wear or avoid high or low contrast. 2 of the color groups use low-contrast and 2 use high-contrast to create the specific psychological effect of Active Yin, Quiet Yin, Reserved Yang, or Active Yang. She mentions cool and warm personal coloring. She advises to take your personality into account.