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Certain Balm Crimson

#aa1b19
Notes

Certain Balm Crimson (#AA1B19) 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 (1°, 74%, 38%) 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
#aa1b19
RGB
rgb(170, 27, 25)
HSL
hsl(1, 74%, 38%)
HWB
hwb(1 10% 33%)
OKLCH
oklch(47.6% 0.178 27.8)
P3
color(display-p3 0.6119 0.1678 0.1358)
HSV
hsv(1, 85%, 67%)
LAB
lab(36.75% 55.16 39.70)
LCH
lch(36.75% 67.96 35.75)
CMYK
cmyk(0%, 84%, 85%, 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.

Balm
modifier

Latin balsamum, aromatic-resin-and-soothing-oil. As a color modifier, balm implies an aromatic-resin-and-soothing-oil-and-lemon-balm quality, the visual register of apothecary-balm-and-lemon-balm hand-aromatic-resin-and-soothing-oil-and-lemon-balm apothecary-balm-and-lemon-balm-and-Tudor-still-room balm-and-aromatic-resin-and-soothing-oil surfaces under apothecary-balm-and-lemon-balm-and-Tudor-still-room Tudor-still-room-and-monastic-physic-garden apothecary-and-still-room-light. Sits at the modifier-and-flavor end of the grid, parallel to bergamot and hyssop 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.

#aa1b19
Original
#4b4316
Protanopia
#6e6110
Deuteranopia
#bc001d
Tritanopia
#393939
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
7.29:1
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
2.88:1

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
##AA1B19
Display P3
Display P3
color(display-p3 0.6119 0.1678 0.1358)
P3 has subtle headroomOKLCH chroma 0.178

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.

Related Colors

Canvas