#A51C20
Closest named color: Brown (#A52A2A). oklch(46.8% 0.172 25.9), rgb(165, 28, 32).
Aa
White text reads best on this color (7.53:1).
About this color
#A51C20 is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.172 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Brown (#A52A2A), ΔE 0.017 away. White text reads best on it, at 7.53:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.172) |
| Temperature | warm |
| Nearest name | Brown (#A52A2A) |
| Black text | 2.78:1 |
| White text | 7.53:1 |
Values
| HEX | #A51C20 |
| RGB | rgb(165, 28, 32) |
| HSL | hsl(358, 71%, 38%) |
| OKLCH | oklch(46.8% 0.172 25.9) |
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 #A51C20 | 7.53:1 | AAA | Lc -89.4 | Fine for body text |
| Black text on #A51C20 | 2.78:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #A51C20 text on white | 7.53:1 | AAA | Lc 84.5 | Fine for body text |
| #A51C20 text on black | 2.78:1 | Fails | Lc -17.5 | 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
#F6CEC9
oklch(88.4% 0.046 26.4)
-
Step 300
300
#F2ACA5
oklch(80.9% 0.084 25.5)
-
Step 400
400
#E87D74
oklch(70.7% 0.134 26)
-
Step 500
500
#DD5750
oklch(63.1% 0.169 26.1)
-
Step 600
600
#C93534
oklch(55.6% 0.185 25.9)
-
Step 700
700 (this color)
#A51C20
oklch(46.8% 0.172 25.9)
-
Step 800
800
#8C2222
oklch(42.6% 0.142 25.6)
-
Step 900
900
#712320
oklch(37.7% 0.111 26.1)
-
Step 950
950
#431613
oklch(27.1% 0.071 26.6)
#A51C20 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) | #49411E | 0.187 |
| Deuteranopia (no green cones) | #6A5F1A | 0.171 |
| Tritanopia (no blue cones) | #B60020 | 0.035 |
| Achromatopsia (no color) | #545454 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A51C20
#A51C20
oklch(46.8% 0.172 25.9)
- #006770
#006770
oklch(46.9% 0.08 205.3)
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 #A51C20, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brown #A52A2A ΔE 0.017
- Auburn #9B2226 ΔE 0.020
- Rufous #AE2012 ΔE 0.024
- Burnt Red #9F2305 ΔE 0.025
- Rust Red #AA2704 ΔE 0.029
- Carmine #9D0216 ΔE 0.029
- Firebrick #B22222 ΔE 0.030
- Rouge #AB1239 ΔE 0.035
Use #A51C20 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.