#A51C2F
Closest named color: Rouge (#AB1239). oklch(47% 0.17 20.4), rgb(165, 28, 47).
Aa
White text reads best on this color (7.48:1).
About this color
#A51C2F is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.170 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.020 away. White text reads best on it, at 7.48:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.170) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.80:1 |
| White text | 7.48:1 |
Values
| HEX | #A51C2F |
| RGB | rgb(165, 28, 47) |
| HSL | hsl(352, 71%, 38%) |
| OKLCH | oklch(47% 0.17 20.4) |
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 #A51C2F | 7.48:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #A51C2F | 2.80:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #A51C2F text on white | 7.48:1 | AAA | Lc 84.4 | Fine for body text |
| #A51C2F text on black | 2.80:1 | Fails | Lc -17.6 | 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
#F6CECC
oklch(88.5% 0.045 21.4)
-
Step 300
300
#F1ACAA
oklch(80.9% 0.082 20.9)
-
Step 400
400
#E77C7D
oklch(70.6% 0.132 20.4)
-
Step 500
500
#DD565D
oklch(63.2% 0.169 20.3)
-
Step 600
600
#C83543
oklch(55.7% 0.183 20.5)
-
Step 700
700 (this color)
#A51C2F
oklch(47% 0.17 20.4)
-
Step 800
800
#8C222C
oklch(42.8% 0.141 20.6)
-
Step 900
900
#712328
oklch(37.9% 0.11 20.5)
-
Step 950
950
#421617
oklch(27% 0.069 21.5)
#A51C2F 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) | #47422F | 0.189 |
| Deuteranopia (no green cones) | #695F2A | 0.172 |
| Tritanopia (no blue cones) | #B60025 | 0.035 |
| Achromatopsia (no color) | #555555 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A51C2F
#A51C2F
oklch(47% 0.17 20.4)
- #00686D
#00686D
oklch(47% 0.08 200.6)
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 #A51C2F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.020
- Brown #A52A2A ΔE 0.021
- Auburn #9B2226 ΔE 0.024
- Firebrick #B22222 ΔE 0.034
- Carmine #9D0216 ΔE 0.035
- Rufous #AE2012 ΔE 0.035
- Cranberry #9E003A ΔE 0.037
- Burnt Red #9F2305 ΔE 0.040
Use #A51C2F 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.