#A81031
Closest named color: Rouge (#AB1239). oklch(46.9% 0.18 18.3), rgb(168, 16, 49).
Aa
White text reads best on this color (7.54:1).
About this color
#A81031 is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.180 and its hue 18°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.012 away. White text reads best on it, at 7.54:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.180) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.78:1 |
| White text | 7.54:1 |
Values
| HEX | #A81031 |
| RGB | rgb(168, 16, 49) |
| HSL | hsl(347, 83%, 36%) |
| OKLCH | oklch(46.9% 0.18 18.3) |
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 #A81031 | 7.54:1 | AAA | Lc -89.1 | Fine for body text |
| Black text on #A81031 | 2.78:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #A81031 text on white | 7.54:1 | AAA | Lc 84.2 | Fine for body text |
| #A81031 text on black | 2.78:1 | Fails | Lc -17.8 | 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
#FDF2F2
oklch(97% 0.012 17.4)
-
Step 100
100
#FAE4E3
oklch(93.6% 0.024 20.7)
-
Step 200
200
#F8CDCD
oklch(88.5% 0.049 18.1)
-
Step 300
300
#F4AAAB
oklch(80.9% 0.088 18.3)
-
Step 400
400
#EA797F
oklch(70.6% 0.14 18)
-
Step 500
500
#E0515F
oklch(63.1% 0.178 18.1)
-
Step 600
600
#CC2C45
oklch(55.6% 0.194 18.4)
-
Step 700
700 (this color)
#A81031
oklch(46.9% 0.18 18.3)
-
Step 800
800
#8F1C2E
oklch(42.8% 0.149 18.3)
-
Step 900
900
#731F29
oklch(37.8% 0.117 18.2)
-
Step 950
950
#441418
oklch(27.1% 0.074 18.7)
#A81031 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) | #454031 | 0.200 |
| Deuteranopia (no green cones) | #695F2C | 0.182 |
| Tritanopia (no blue cones) | #B90020 | 0.038 |
| Achromatopsia (no color) | #545454 | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A81031
#A81031
oklch(46.9% 0.18 18.3)
- #00686B
#00686B
oklch(47% 0.08 198.3)
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 #A81031, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.012
- Brown #A52A2A ΔE 0.032
- Cranberry #9E003A ΔE 0.032
- Auburn #9B2226 ΔE 0.033
- Carmine #9D0216 ΔE 0.037
- Firebrick #B22222 ΔE 0.038
- Raspberry #B00149 ΔE 0.039
- Rufous #AE2012 ΔE 0.041
Use #A81031 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.