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Noble Tribe Brick

#ac3a21
Notes

Noble Tribe Brick (#AC3A21) is a true red with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (11°, 68%, 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 cyan. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#ac3a21
RGB
rgb(172, 58, 33)
HSL
hsl(11, 68%, 40%)
HWB
hwb(11 13% 33%)
OKLCH
oklch(50.9% 0.154 33.9)
P3
color(display-p3 0.6236 0.2591 0.1679)
HSV
hsv(11, 81%, 67%)
LAB
lab(41.07% 45.34 39.74)
LCH
lch(41.07% 60.29 41.23)
CMYK
cmyk(0%, 66%, 81%, 33%)

Etymology

Noble
adjective

Latin nōbilis, well-known / illustrious — sharing root with gnōscere (to know). As a color modifier, noble implies a saturated-and-dignified-and-aristocratic quality, the deep-rich color of pre-modern European noble-class hereditary-aristocratic livery-and-armorial bearings. Sits at the bold-and-aristocratic end of the grid, parallel to aristocratic and highborn in usage.

Tribe
modifier

Latin tribus, one-of-three-original-tribes. As a color modifier, tribe implies a kin-and-clan-and-extended-family quality, the visual register of pre-modern-tribal-and-kinship hand-built tent-and-totem-and-elder-council clan-and-kinship surfaces under pre-modern tribal-and-kinship hand-built encampment-and-elder-council firelight. Sits at the modifier-and-cultural end of the grid, parallel to clan and kin in usage.

Brick
noun

Fired clay, mineral red. The color refers to common building brick — iron-rich earthenware kilned to the specific dusky red-orange of a Victorian terrace, a Roman aqueduct, an adobe wall in New Mexico. Less saturated than ruby, warmer than burgundy, with a chalky cast that reads as architectural rather than decorative.

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.

#ac3a21
Original
#5b511d
Protanopia
#776a1c
Deuteranopia
#be1835
Tritanopia
#505050
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
6.21:1
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
3.38:1

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
##AC3A21
Display P3
Display P3
color(display-p3 0.6236 0.2591 0.1679)
P3 has subtle headroomOKLCH chroma 0.154

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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