#A81631
Closest named color: Rouge (#AB1239). oklch(47.2% 0.177 19), rgb(168, 22, 49).
Aa
White text reads best on this color (7.43:1).
About this color
#A81631 is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.177 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.013 away. White text reads best on it, at 7.43:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.82:1 |
| White text | 7.43:1 |
Values
| HEX | #A81631 |
| RGB | rgb(168, 22, 49) |
| HSL | hsl(349, 77%, 37%) |
| OKLCH | oklch(47.2% 0.177 19) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #A81631 | 7.43:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #A81631 | 2.82:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #A81631 text on white | 7.43:1 | AAA | Lc 84.0 | Fine for body text |
| #A81631 text on black | 2.82:1 | Fails | Lc -18.0 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FAE4E3
oklch(93.6% 0.024 20.7)
-
Step 200
200
#F7CDCD
oklch(88.4% 0.048 18.1)
-
Step 300
300
#F3ABAB
oklch(81% 0.085 19.1)
-
Step 400
400
#E97A7E
oklch(70.6% 0.137 18.9)
-
Step 500
500
#DF535E
oklch(63.1% 0.174 19.1)
-
Step 600
600
#CA2F44
oklch(55.5% 0.19 19.1)
-
Step 700
700 (this color)
#A81631
oklch(47.2% 0.177 19)
-
Step 800
800
#8E1E2D
oklch(42.8% 0.146 19.2)
-
Step 900
900
#722028
oklch(37.7% 0.115 19.2)
-
Step 950
950
#431418
oklch(26.9% 0.073 18.4)
#A81631 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #464231 | 0.197 |
| Deuteranopia (no green cones) | #6A602C | 0.179 |
| Tritanopia (no blue cones) | #B90023 | 0.036 |
| Achromatopsia (no color) | #555555 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A81631
#A81631
oklch(47.2% 0.177 19)
- #00696C
#00696C
oklch(47.3% 0.08 198.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #A81631, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.013
- Brown #A52A2A ΔE 0.027
- Auburn #9B2226 ΔE 0.031
- Firebrick #B22222 ΔE 0.035
- Cranberry #9E003A ΔE 0.035
- Rufous #AE2012 ΔE 0.038
- Carmine #9D0216 ΔE 0.038
- Raspberry #B00149 ΔE 0.040
Use #A81631 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.