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Authoritative Sigil Brick

#ac4125
Notes

Authoritative Sigil Brick (#AC4125) 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 (12°, 65%, 41%) 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
#ac4125
RGB
rgb(172, 65, 37)
HSL
hsl(12, 65%, 41%)
HWB
hwb(12 15% 33%)
OKLCH
oklch(51.9% 0.147 35.5)
P3
color(display-p3 0.6251 0.2823 0.1818)
HSV
hsv(12, 78%, 67%)
LAB
lab(42.29% 42.33 38.87)
LCH
lch(42.29% 57.47 42.56)
CMYK
cmyk(0%, 62%, 78%, 33%)

Etymology

Authoritative
adjective

Latin auctōritāt-, authority — adjectival suffix -ive. As a color modifier, authoritative implies a saturated-and-formal-imperative quality where the hue carries decisional weight and institutional credibility. Sits at the bold-and-authoritative end of the grid, parallel to commanding and magisterial in usage.

Sigil
modifier

Latin sigillum, little-sign-or-seal. As a color modifier, sigil implies a magical-seal-and-grimoire-symbol quality, the visual register of medieval-grimoire-and-Solomonic-sigil hand-magical-seal-and-grimoire-symbol medieval-grimoire-and-Solomonic-sigil-and-Renaissance-occult sigil-and-magical-seal-and-grimoire-symbol surfaces under medieval-grimoire-and-Solomonic-sigil-and-Renaissance-occult parchment-and-vellum-and-quill grimoire-and-occult-light. Sits at the modifier-and-myth end of the grid, parallel to rune and omen 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.

#ac4125
Original
#5f5521
Protanopia
#796d21
Deuteranopia
#bd263b
Tritanopia
#565656
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
5.94:1
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
3.54:1

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
##AC4125
Display P3
Display P3
color(display-p3 0.6251 0.2823 0.1818)
P3 has subtle headroomOKLCH chroma 0.147

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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