#A51C36
Closest named color: Rouge (#AB1239). oklch(47.1% 0.17 17.4), rgb(165, 28, 54).
Aa
White text reads best on this color (7.44:1).
About this color
#A51C36 is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.170 and its hue 17°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.014 away. White text reads best on it, at 7.44:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.170) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.81:1 |
| White text | 7.44:1 |
Values
| HEX | #A51C36 |
| RGB | rgb(165, 28, 54) |
| HSL | hsl(349, 71%, 38%) |
| OKLCH | oklch(47.1% 0.17 17.4) |
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 #A51C36 | 7.44:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #A51C36 | 2.81:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #A51C36 text on white | 7.44:1 | AAA | Lc 84.3 | Fine for body text |
| #A51C36 text on black | 2.81:1 | Fails | Lc -17.7 | 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
#FDF3F3
oklch(97.2% 0.011 17.3)
-
Step 100
100
#FAE4E4
oklch(93.7% 0.024 17.6)
-
Step 200
200
#F6CECE
oklch(88.6% 0.045 18)
-
Step 300
300
#F1ABAD
oklch(80.8% 0.083 17.2)
-
Step 400
400
#E77C82
oklch(70.7% 0.132 17.5)
-
Step 500
500
#DC5663
oklch(63.1% 0.168 17.5)
-
Step 600
600
#C7344A
oklch(55.5% 0.183 17.4)
-
Step 700
700 (this color)
#A51C36
oklch(47.1% 0.17 17.4)
-
Step 800
800
#8C2131
oklch(42.8% 0.142 17.6)
-
Step 900
900
#70222B
oklch(37.6% 0.11 17.5)
-
Step 950
950
#42151A
oklch(26.9% 0.07 16.4)
#A51C36 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) | #464336 | 0.190 |
| Deuteranopia (no green cones) | #685F32 | 0.173 |
| Tritanopia (no blue cones) | #B50028 | 0.034 |
| Achromatopsia (no color) | #555555 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A51C36
#A51C36
oklch(47.1% 0.17 17.4)
- #00696B
#00696B
oklch(47.2% 0.08 197.1)
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 #A51C36, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.014
- Brown #A52A2A ΔE 0.027
- Auburn #9B2226 ΔE 0.030
- Cranberry #9E003A ΔE 0.032
- Firebrick #B22222 ΔE 0.040
- Raspberry #B00149 ΔE 0.040
- Carmine #9D0216 ΔE 0.041
- Rufous #AE2012 ΔE 0.043
Use #A51C36 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.