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Buttressed Sol Mulberry

#820b6b
Notes

Buttressed Sol Mulberry (#820B6B) 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°, 84%, 28%) places it in the highly saturated band at a dark lightness. Best used in small doses, like logos, CTAs, focus rings, or highlight text, where its saturation becomes a feature rather than noise. 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
#820b6b
RGB
rgb(130, 11, 107)
HSL
hsl(312, 84%, 28%)
HWB
hwb(312 4% 49%)
OKLCH
oklch(41.6% 0.174 338.5)
P3
color(display-p3 0.4663 0.1039 0.4071)
HSV
hsv(312, 92%, 51%)
LAB
lab(29.53% 54.43 -23.49)
LCH
lch(29.53% 59.28 336.65)
CMYK
cmyk(0%, 92%, 18%, 49%)

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.

Sol
modifier

Latin sol, sun-and-Roman-sun-god. As a color modifier, sol implies a Roman-sun-god-and-stellar-disc quality, the visual register of Roman-Sol-Invictus-and-Apollo-sun hand-Roman-sun-god-and-stellar-disc Roman-Sol-Invictus-and-Apollo-sun-and-Helios-chariot sol-and-Roman-sun-god-and-stellar-disc surfaces under Roman-Sol-Invictus-and-Apollo-sun-and-Helios-chariot December-25-and-Helios-and-quadriga noon-stellar-disc-light. Sits at the modifier-and-zodiac end of the grid, parallel to luna and terra in usage.

Mulberry
noun

The genus Morus — the white mulberry (M. alba) feeds silkworms; the black mulberry (M. nigra) bears the deep purple fruit that stains everything it touches. The color refers to a ripe black mulberry: a saturated, slightly red-shifted very deep purple with the slight juiciness of a compound fruit. Cooler than wine, warmer than indigo, with the agricultural weight of a tree that supported the entire Chinese silk industry for two thousand years.

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.

#820b6b
Original
#153a6d
Protanopia
#404c69
Deuteranopia
#8a153e
Tritanopia
#2b2b2b
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
9.51:1
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
2.21:1

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
##820B6B
Display P3
Display P3
color(display-p3 0.4663 0.1039 0.4071)
P3 has subtle headroomOKLCH chroma 0.174

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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