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Steeped Lupin

#1d1f66
Notes

Steeped Lupin (#1D1F66) is a deep blue 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 (238°, 56%, 26%) places it in the balanced band at a dark lightness. It works well as a headline, icon, or deep background in an otherwise light layout, pairing cleanly with cream, bone, and warm neutrals. For a confident two-color system, pair it with its complementary yellow. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#1d1f66
RGB
rgb(29, 31, 102)
HSL
hsl(238, 56%, 26%)
HWB
hwb(238 11% 60%)
OKLCH
oklch(29.0% 0.122 274.6)
HSV
hsv(238, 72%, 40%)
LAB
lab(16.50% 24.55 -41.97)
LCH
lch(16.50% 48.62 300.32)
CMYK
cmyk(72%, 70%, 0%, 60%)

Etymology

Steeped
adjective

Old English stēpan, to dip / soak — past-participle of steep. As a color modifier, steeped implies the deep-and-saturation-rich quality of dye-bath-saturated textile, where the hue has reached fiber-saturation. Sits at the deep-and-saturated end of the grid, parallel to infused and suffused.

Lupin
noun

The genus Lupinus — North American and European legumes whose tall blue-violet flower spikes appear in alpine meadows and cottage borders. The Latin lupus, wolf, references the old (incorrect) belief that the plant depleted soil. The color refers to a fresh blue lupin spike: a saturated, slightly violet-shifted blue with the matte finish of stacked pea-family flowers. Cooler than larkspur, warmer than wisteria, with the high-meadow weight of a perennial that tolerates poor soil.

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.

#1d1f66
Original
#002c68
Protanopia
#002665
Deuteranopia
#00323f
Tritanopia
#242424
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).
AAAon White
14.58:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
Failon Black
1.44:1

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