colors
Back to gallery

Certain Peplos Crimson

#ac1826
Notes

Certain Peplos Crimson (#AC1826) is a true red 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 (354°, 76%, 38%) places it in the highly saturated band at a mid 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 teal. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#ac1826
RGB
rgb(172, 24, 38)
HSL
hsl(354, 76%, 38%)
HWB
hwb(354 9% 33%)
OKLCH
oklch(47.9% 0.180 23.7)
HSV
hsv(354, 86%, 67%)
LAB
lab(37.05% 56.81 32.80)
LCH
lch(37.05% 65.60 30.00)
CMYK
cmyk(0%, 86%, 78%, 33%)

Etymology

Certain
adjective

Latin certus, fixed / sure — sharing root with English concern and certify. As a color modifier, certain implies a saturated-and-unambiguous quality where the hue declares its character without hesitation. Sits at the bold-and-confident end of the grid, parallel to assured and decisive in usage.

Peplos
modifier

Greek πέπλος, Hellenic-women's-robe. As a color modifier, peplos implies a Hellenic-women's-peplos-and-pinned-shoulder quality, the visual register of Hellenic-peplos-and-Athena-Parthenos hand-Hellenic-women's-peplos-and-pinned-shoulder Hellenic-peplos-and-Athena-Parthenos-and-Panathenaic-festival peplos-and-Hellenic-women's-peplos surfaces under Hellenic-peplos-and-Athena-Parthenos-and-Panathenaic-festival Athenian-Acropolis-and-Panathenaic-procession Hellenic-court-light. Sits at the modifier-and-textile end of the grid, parallel to chiton and tunic in usage.

Crimson
noun

From the Old Spanish cremesin, itself from the Arabic qirmiz — the kermes scale insect, dried and ground into a brilliant carmine dye prized in the medieval Mediterranean. For centuries the most expensive red on a draper's shelf, reserved for cardinals, kings, and the cloth that gave English the word crimson. Cooler than scarlet, deeper than rose; the color of pomegranate seeds and a serious occasion.

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.

#ac1826
Original
#4a4325
Protanopia
#6e6220
Deuteranopia
#be0020
Tritanopia
#383838
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
7.21:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
Failon Black
2.91:1

Related Colors

Canvas