Guides · Color science
Color Theory in Plain English: Hue, Value, Chroma
Every conversation about personal color comes down to three words: hue, value, chroma. They aren't jargon — they're the three independent dimensions you can change in any color, and the only ones that matter when you're choosing what to wear. Learn them once and "warm" / "cool" / "soft" / "deep" stop being mysterious.
Hue: what color it is
Hue is the part of a color you'd name — red, orange, yellow, green, blue, violet. It's the position on the color wheel. Two reds can share the same hue but feel completely different because they differ in the other two dimensions.
Value: how light or dark it is
Value runs from white to black through every shade of grey. Mustard yellow and lemon yellow share the same hue but lemon is much higher in value. In Munsell's system — the standard since 1905 — value is the vertical axis. In CIE Lab, the system Palette Reveal uses, value is the L axis (0 = black, 100 = white).
Chroma: how saturated or muted it is
Chroma is the distance from a pure neutral grey. A fire-engine red is high chroma; a brick red is the same hue at lower chroma. Muted, dusty, smoky, "earthy" colors are all low-chroma. Bright, vivid, electric, "neon" colors are all high-chroma. This is the dimension most color-analysis beginners overlook — matching hue and value but missing chroma is why two colors that "should work" can still feel wrong on you.
Why your season cares about all three
- Light seasons (Light Spring, Light Summer) need high value — pale, airy colors.
- Dark seasons (Dark Autumn, Dark Winter) need low value — rich, deep colors.
- Soft seasons (Soft Autumn, Soft Summer) need low chroma — muted, dusty colors.
- Bright seasons (Bright Spring, Bright Winter) need high chroma — saturated, vivid colors.
- Warm seasons (Spring, Autumn) need hues on the yellow side of the wheel.
- Cool seasons (Summer, Winter) need hues on the blue side.
Munsell vs CIE Lab vs HSL: which one matters?
Three systems exist and they all describe the same three dimensions slightly differently. Munsell is what artists and designers learn. CIE Lab is what color scientists and Palette Reveal use because its distances match human perception. HSL (hue-saturation-lightness) is what designers see in Photoshop — it's quick but distorts perceptual distance. For an analysis tool to be accurate, it has to compute in Lab, not HSL. Warm vs cool undertones uses the b-axis of Lab specifically because that axis maps cleanly to how warm or cool a color reads on skin.
Sources & further reading
- Munsell Color Company — the original 1905 system
- CIE Publication 15:2018 — Colorimetry
- Wikipedia — CIELAB color space