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Buttressed Sash Brick

#a63735
Notes

Buttressed Sash Brick (#A63735) is a true red with an earthy character. It leans grounded and natural, the kind of color that plays well with wood, clay, linen, and warm neutrals. Its HSL profile (1°, 52%, 43%) 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
#a63735
RGB
rgb(166, 55, 53)
HSL
hsl(1, 52%, 43%)
HWB
hwb(1 21% 35%)
OKLCH
oklch(49.8% 0.147 25.1)
P3
color(display-p3 0.6016 0.2468 0.2257)
HSV
hsv(1, 68%, 65%)
LAB
lab(39.75% 45.44 26.58)
LCH
lch(39.75% 52.64 30.33)
CMYK
cmyk(0%, 67%, 68%, 35%)

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.

Sash
modifier

Arabic shāsh, muslin-strip-or-turban-cloth. As a color modifier, sash implies a wound-strip-and-cummerbund-and-bandolier quality, the visual register of Mughal-cummerbund-and-Spanish-fajín-sash hand-wound-strip-and-cummerbund-and-bandolier Mughal-cummerbund-and-Spanish-fajín-sash-and-Ottoman-sash sash-and-wound-strip-and-cummerbund surfaces under Mughal-cummerbund-and-Spanish-fajín-sash-and-Ottoman-sash Mughal-Delhi-and-Iberian-and-Ottoman-Topkapi wound-cloth-light. Sits at the modifier-and-textile end of the grid, parallel to kilt and shawl 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.

#a63735
Original
#554f34
Protanopia
#716632
Deuteranopia
#b61b38
Tritanopia
#4e4e4e
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
6.52:1
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
3.22:1

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
##A63735
Display P3
Display P3
color(display-p3 0.6016 0.2468 0.2257)
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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