#A31C1E
Closest named color: Auburn (#9B2226). oklch(46.4% 0.17 26.5), rgb(163, 28, 30).
Aa
White text reads best on this color (7.65:1).
About this color
#A31C1E is a medium-dark, vivid red. In OKLCH its lightness is 46%, its chroma 0.170 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Auburn (#9B2226), ΔE 0.017 away. White text reads best on it, at 7.65:1.
| Hue family | Reds |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.170) |
| Temperature | warm |
| Nearest name | Auburn (#9B2226) |
| Black text | 2.74:1 |
| White text | 7.65:1 |
Values
| HEX | #A31C1E |
| RGB | rgb(163, 28, 30) |
| HSL | hsl(359, 71%, 37%) |
| OKLCH | oklch(46.4% 0.17 26.5) |
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 #A31C1E | 7.65:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #A31C1E | 2.74:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #A31C1E text on white | 7.65:1 | AAA | Lc 84.9 | Fine for body text |
| #A31C1E text on black | 2.74:1 | Fails | Lc -17.1 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E1
oklch(93.6% 0.025 26.9)
-
Step 200
200
#F6CEC9
oklch(88.4% 0.046 26.4)
-
Step 300
300
#F1ADA5
oklch(81% 0.081 26.5)
-
Step 400
400
#E77E74
oklch(70.7% 0.131 26.6)
-
Step 500
500
#DD5850
oklch(63.2% 0.168 26.4)
-
Step 600
600
#C83734
oklch(55.6% 0.183 26.4)
-
Step 700
700 (this color)
#A31C1E
oklch(46.4% 0.17 26.5)
-
Step 800
800
#8C2321
oklch(42.7% 0.141 26.4)
-
Step 900
900
#712420
oklch(37.8% 0.11 26.7)
-
Step 950
950
#421613
oklch(26.9% 0.069 26.6)
#A31C1E 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) | #48411C | 0.186 |
| Deuteranopia (no green cones) | #695E17 | 0.169 |
| Tritanopia (no blue cones) | #B4001F | 0.035 |
| Achromatopsia (no color) | #535353 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A31C1E
#A31C1E
oklch(46.4% 0.17 26.5)
- #00656F
#00656F
oklch(46.3% 0.079 206.6)
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 #A31C1E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Auburn #9B2226 ΔE 0.017
- Brown #A52A2A ΔE 0.020
- Burnt Red #9F2305 ΔE 0.022
- Carmine #9D0216 ΔE 0.026
- Rufous #AE2012 ΔE 0.027
- Rust Red #AA2704 ΔE 0.030
- Deep Red #9A0200 ΔE 0.034
- Firebrick #B22222 ΔE 0.034
Use #A31C1E 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.