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Buttressed Velveteen

#cb51b2
Notes

Buttressed Velveteen (#CB51B2) is a true magenta 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 (312°, 54%, 56%) 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
#cb51b2
RGB
rgb(203, 81, 178)
HSL
hsl(312, 54%, 56%)
HWB
hwb(312 32% 20%)
OKLCH
oklch(62.7% 0.190 336.4)
HSV
hsv(312, 60%, 80%)
LAB
lab(53.81% 59.53 -27.99)
LCH
lch(53.81% 65.78 334.82)
CMYK
cmyk(0%, 60%, 12%, 20%)

Etymology

Buttressed
adjective

Old French bouterez, thrusting-mass — past-participle of buttress, derived from bouter (to thrust). As a color modifier, buttressed implies a saturated-and-architecturally-supported quality, the deep-rich color of Gothic-Cathedral flying-buttress-and-rib-vault stone-architecture. Sits at the bold-and-fortified end of the grid, parallel to fortified and reinforced.

Velveteen
noun

Velveteen — a cotton-pile imitation of silk velvet developed in late-Victorian England (c. 1880s), often dyed in deep-magenta synthetic fuchsine for women's day-dresses. Velveteen color refers to a Liberty-of-London Edwardian-period velveteen day-dress: a saturated, slightly cool deep magenta with the velvet finish of synthetic-dyed cotton pile. Warmer than silk velvet, cooler than cotton-blend corduroy.

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.

#cb51b2
Original
#5375b5
Protanopia
#7887af
Deuteranopia
#d5577a
Tritanopia
#727272
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).
AA Largeon White
3.92:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAon Black
5.36:1

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