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Menacing Catalina

#510d43
Notes

Menacing Catalina (#510D43) is a deep magenta with a jewel character. It carries the deep, saturated richness of a gemstone. Authoritative and slightly formal, it works well for type and heavy UI elements. Its HSL profile (312°, 72%, 18%) 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 green. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#510d43
RGB
rgb(81, 13, 67)
HSL
hsl(312, 72%, 18%)
HWB
hwb(312 5% 68%)
OKLCH
oklch(30.6% 0.117 338.0)
P3
color(display-p3 0.2900 0.0754 0.2548)
HSV
hsv(312, 84%, 32%)
LAB
lab(17.66% 36.48 -16.08)
LCH
lch(17.66% 39.87 336.21)
CMYK
cmyk(0%, 84%, 17%, 68%)

Etymology

Menacing
adjective

Latin minārī, to threaten — present-participle of menace, sharing root with minatory. As a color modifier, menacing implies a deep-and-threatening-and-imposing quality, the dark cool-gray of looming storm-cloud-and-imposing-cliff visual-presence. Sits at the deep-and-threatening end of the grid, parallel to ominous and foreboding in tone.

Catalina
noun

Californian Catalina silver lace (Eriogonum giganteum) — a Polygonaceae shrub native to Santa Catalina Island off the southern California coast, with deep-magenta clustered terminal flower-heads in late summer. Catalina color refers to a fully bloomed Eriogonum giganteum terminal cluster on the Catalina Island chaparral: a saturated, slightly cool deep magenta with the matte finish of dense small radiating flower-heads.

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.

#510d43
Original
#102544
Protanopia
#282f41
Deuteranopia
#561127
Tritanopia
#1f1f1f
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
14.11:1
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
1.49:1

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
##510D43
Display P3
Display P3
color(display-p3 0.2900 0.0754 0.2548)
P3 has subtle headroomOKLCH chroma 0.117

Moderately saturated colors gain a small bump in P3 — the difference is usually visible side-by-side on wide-gamut hardware but won't change the character of the color.

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