#A81337
Closest named color: Rouge (#AB1239). oklch(47.2% 0.178 16.1), rgb(168, 19, 55).
Aa
White text reads best on this color (7.46:1).
About this color
#A81337 is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.178 and its hue 16°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.007 away. White text reads best on it, at 7.46:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.178) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.81:1 |
| White text | 7.46:1 |
Values
| HEX | #A81337 |
| RGB | rgb(168, 19, 55) |
| HSL | hsl(346, 80%, 37%) |
| OKLCH | oklch(47.2% 0.178 16.1) |
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 #A81337 | 7.46:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #A81337 | 2.81:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #A81337 text on white | 7.46:1 | AAA | Lc 84.0 | Fine for body text |
| #A81337 text on black | 2.81:1 | Fails | Lc -17.9 | 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
#FDF2F3
oklch(97% 0.012 11)
-
Step 100
100
#FAE4E4
oklch(93.7% 0.024 17.6)
-
Step 200
200
#F7CDCE
oklch(88.5% 0.048 16.5)
-
Step 300
300
#F3AAAD
oklch(80.8% 0.086 16.4)
-
Step 400
400
#EA7A83
oklch(70.8% 0.138 16.2)
-
Step 500
500
#DF5164
oklch(63% 0.177 15.9)
-
Step 600
600
#CB2D4B
oklch(55.7% 0.192 16.1)
-
Step 700
700 (this color)
#A81337
oklch(47.2% 0.178 16.1)
-
Step 800
800
#8E1C32
oklch(42.7% 0.148 16)
-
Step 900
900
#721F2C
oklch(37.6% 0.116 15.8)
-
Step 950
950
#43141A
oklch(27% 0.073 15.8)
#A81337 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) | #454237 | 0.199 |
| Deuteranopia (no green cones) | #696033 | 0.182 |
| Tritanopia (no blue cones) | #B90024 | 0.040 |
| Achromatopsia (no color) | #555555 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A81337
#A81337
oklch(47.2% 0.178 16.1)
- #00696A
#00696A
oklch(47.2% 0.08 195.9)
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 #A81337, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.007
- Cranberry #9E003A ΔE 0.029
- Raspberry #B00149 ΔE 0.032
- Brown #A52A2A ΔE 0.035
- Auburn #9B2226 ΔE 0.037
- Firebrick #B22222 ΔE 0.042
- Carmine #9D0216 ΔE 0.043
- Rose Red #BE013C ΔE 0.045
Use #A81337 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.