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Stalwart Nineveh

#b31b9c
Notes

Stalwart Nineveh (#B31B9C) is a true violet with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (309°, 74%, 40%) 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 green. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#b31b9c
RGB
rgb(179, 27, 156)
HSL
hsl(309, 74%, 40%)
HWB
hwb(309 11% 30%)
OKLCH
oklch(53.3% 0.221 335.8)
P3
color(display-p3 0.6443 0.1739 0.5937)
HSV
hsv(309, 85%, 70%)
LAB
lab(42.42% 68.50 -33.08)
LCH
lch(42.42% 76.07 334.23)
CMYK
cmyk(0%, 85%, 13%, 30%)

Etymology

Stalwart
adjective

Old English stǣl-wyrðe, stable-and-worthy. As a color modifier, stalwart implies a saturated-and-loyal-and-firm quality where the hue carries the dependable-and-trustworthy visual presence of a Knight-Templar guard. Sits at the bold-and-firm end of the grid, parallel to steadfast and firm in usage.

Nineveh
noun

Assyrian capital (modern Mosul, Iraq) — the imperial court of Sennacherib (705–681 BCE), where Tyrian purple tribute textiles were imported from the Phoenician coast. Nineveh color refers to an Assyrian-court purpura-bordered tribute textile in the Library of Ashurbanipal: a saturated, slightly cool deep violet with the matte finish of multi-bath shellfish dye on hand-loomed Mesopotamian wool.

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

Click any swatch to explore

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.

#b31b9c
Original
#1d569f
Protanopia
#596c99
Deuteranopia
#bc2b5e
Tritanopia
#454545
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).
AAon White
5.91:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AA Largeon Black
3.55:1

Wide gamut

Display P3 representation

The CSS Color 4 wide-gamut form of this color. Both swatches render the same color on every display — the P3 form only diverges from sRGB when a designer pushes channels outside sRGB's reach.

sRGB hex
sRGB hex
##B31B9C
Display P3
Display P3
color(display-p3 0.6443 0.1739 0.5937)
P3 has visible headroomOKLCH chroma 0.221

This color is chromatic enough that authoring it as P3 native (instead of clamping to sRGB) gives a perceptibly more saturated render on wide-gamut displays — modern Macs, iPhones, iPads, and most recent OLED laptops.

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