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Tracer Erodium

#a66def
Notes

Tracer Erodium (#A66DEF) is a true indigo with a cool character. It leans cool, sitting on the blue, green, and violet side of the wheel. Quiet and dependable, a fit for product UI and data visualization. Its HSL profile (266°, 80%, 68%) places it in the highly saturated band at a mid lightness. Best used in small doses, like logos, CTAs, focus rings, or highlight text, where its saturation becomes a feature rather than noise. For a confident two-color system, pair it with its complementary lime. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#a66def
RGB
rgb(166, 109, 239)
HSL
hsl(266, 80%, 68%)
HWB
hwb(266 43% 6%)
OKLCH
oklch(65.3% 0.190 301.6)
HSV
hsv(266, 54%, 94%)
LAB
lab(57.34% 48.19 -57.40)
LCH
lch(57.34% 74.95 310.02)
CMYK
cmyk(31%, 54%, 0%, 6%)

Etymology

Tracer
adjective

Old French tracier, to trace — sharing root with English trace and track. As a color modifier, tracer implies a saturated-and-streak-of-light quality, the bright color of military-tracer-round and long-exposure-photography light-trail visual streak. Sits at the bright-and-active end of the grid, parallel to flashing and streaking in usage.

Erodium
noun

Eurasian storksbill (Erodium cicutarium) — a Geraniaceae annual with deep-violet five-petaled cup-flowers and the long-pointed seed-pod shaped like a stork's bill. Erodium color refers to a fully bloomed Erodium cicutarium cup-flower: a saturated, slightly cool deep violet with the velvet finish of fresh small five-petaled cup-corollas. The genus name comes from the Greek erōdios (heron), after the seed-pod shape.

Closest matches

The nearest named color in three reference sources, ranked by perceptual distance (ΔE76 in CIELAB). ΔE < 1 is imperceptible to most viewers; ΔE > 10 is clearly different. When two sources point to the same hex they’re merged into one tile; click any to open that color’s page.

Variations

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Harmonies

Accessibility

Color-vision simulation

How this color appears to viewers with the four major color-vision-deficiency types. Computed via the Machado (2009) physiologically-based model. If a tile matches the original, the color reads the same to that viewer.

#a66def
Original
#3a89f3
Protanopia
#4d89ec
Deuteranopia
#9886a4
Tritanopia
#838383
Achromatopsia
WCAG contrast

The color used as foreground text against pure white and pure black, with the contrast ratio and WCAG 2.1 grade. Aim for AA (4.5:1) for body text and AA Large (3:1) for 18 pt+ headlines; AAA (7:1) is the gold standard for long-form reading surfaces.

The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AA Largeon White
3.47:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAon Black
6.06:1

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