#A81F2B
Closest named color: Brown (#A52A2A). oklch(47.7% 0.171 22.8), rgb(168, 31, 43).
Aa
White text reads best on this color (7.25:1).
About this color
#A81F2B is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.171 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.015 away. White text reads best on it, at 7.25:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.171) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 2.89:1 |
| White text | 7.25:1 |
Values
| HEX | #A81F2B |
| RGB | rgb(168, 31, 43) |
| HSL | hsl(355, 69%, 39%) |
| OKLCH | oklch(47.7% 0.171 22.8) |
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 #A81F2B | 7.25:1 | AAA | Lc -88.6 | Fine for body text |
| Black text on #A81F2B | 2.89:1 | Fails | Lc 20.5 | Dividers and decoration only |
| #A81F2B text on white | 7.25:1 | AAA | Lc 83.6 | Fine for body text |
| #A81F2B text on black | 2.89:1 | Fails | Lc -18.4 | 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
#FAE4E2
oklch(93.6% 0.024 23.9)
-
Step 200
200
#F6CECB
oklch(88.5% 0.046 23.1)
-
Step 300
300
#F2ACA8
oklch(81% 0.083 22.7)
-
Step 400
400
#E87D79
oklch(70.8% 0.133 23.2)
-
Step 500
500
#DD5657
oklch(63.1% 0.17 22.9)
-
Step 600
600
#C9343D
oklch(55.6% 0.185 22.6)
-
Step 700
700 (this color)
#A81F2B
oklch(47.7% 0.171 22.8)
-
Step 800
800
#8C2228
oklch(42.7% 0.141 22.7)
-
Step 900
900
#712324
oklch(37.8% 0.11 23.4)
-
Step 950
950
#431616
oklch(27.2% 0.07 22.9)
#A81F2B 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) | #4A442A | 0.189 |
| Deuteranopia (no green cones) | #6C6126 | 0.171 |
| Tritanopia (no blue cones) | #B90025 | 0.034 |
| Achromatopsia (no color) | #575757 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A81F2B
#A81F2B
oklch(47.7% 0.171 22.8)
- #006A71
#006A71
oklch(47.8% 0.081 202.8)
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 #A81F2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.015
- Rouge #AB1239 ΔE 0.024
- Firebrick #B22222 ΔE 0.025
- Rufous #AE2012 ΔE 0.026
- Auburn #9B2226 ΔE 0.027
- Rust Red #AA2704 ΔE 0.034
- Burnt Red #9F2305 ΔE 0.036
- Brick #A03623 ΔE 0.038
Use #A81F2B 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.