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Murky Bishop

#5a278c
Notes

Murky Bishop (#5A278C) 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 (270°, 56%, 35%) 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 lime. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#5a278c
RGB
rgb(90, 39, 140)
HSL
hsl(270, 56%, 35%)
HWB
hwb(270 15% 45%)
OKLCH
oklch(40.0% 0.159 302.9)
HSV
hsv(270, 72%, 55%)
LAB
lab(28.16% 43.10 -46.91)
LCH
lch(28.16% 63.70 312.57)
CMYK
cmyk(36%, 72%, 0%, 45%)

Etymology

Murky
adjective

From Old Norse myrkr, darkness — sharing root with mirkwood. Murky implies low value combined with reduced clarity — the deep brown-greens of pond water, the dim interior of a smoke-blackened bar. Sits at the deep-and-dirtied end of the grid, where the color is both dark and slightly clouded.

Bishop
noun

Greek epískopos via Latin episcopus, overseer — the ecclesiastical office whose Roman-Catholic and Anglican vesture includes a deep-violet cassock under white rochet and chimere. Bishop color refers to a contemporary Roman-Catholic episcopal cassock: a saturated, slightly cool deep violet with the matte finish of vat-dyed liturgical wool. Distinct from the deep-red cardinal cassock and the white papal cassock.

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.

#5a278c
Original
#00428f
Protanopia
#00428a
Deuteranopia
#503f57
Tritanopia
#393939
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
9.98:1
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
2.10:1

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