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Fathomless Lavender

#333583
Notes

Fathomless Lavender (#333583) is a true blue with an earthy character. It leans grounded and natural, the kind of color that plays well with wood, clay, linen, and warm neutrals. Its HSL profile (239°, 44%, 36%) places it in the balanced band at a mid lightness. It works across type, buttons, and borders, saturated enough to feel deliberate but balanced enough to not fight the rest of the palette. 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
#333583
RGB
rgb(51, 53, 131)
HSL
hsl(239, 44%, 36%)
HWB
hwb(239 20% 49%)
OKLCH
oklch(37.5% 0.128 277.2)
HSV
hsv(239, 61%, 51%)
LAB
lab(26.41% 24.07 -44.33)
LCH
lch(26.41% 50.45 298.50)
CMYK
cmyk(61%, 60%, 0%, 49%)

Etymology

Fathomless
adjective

Fathom (Old English fæthm, six-foot span used to measure water-depth) plus suffix -less. As a color modifier, fathomless implies a depth of saturation-and-darkness that resists the eye's attempt to gauge it. Sits at the deepest end of the deep-bucket grid, beyond ordinary measure of color-depth perception.

Lavender
noun

Lavandula angustifolia, the Mediterranean shrub cultivated since Roman times for fragrance and ornament — the symbol of Provence's Plateau de Valensole, where July fields look painted. The color refers to a fresh lavender flower spike at peak bloom: a soft, slightly muted pale blue-violet with the matte finish of small clustered florets. Lighter than periwinkle, cooler than mauve, with the aromatic weight of essential oil and dried sachet alike.

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.

#333583
Original
#004286
Protanopia
#003b81
Deuteranopia
#004856
Tritanopia
#3a3a3a
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
10.62:1
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
1.98:1

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