#AB1F37
Closest named color: Rouge (#AB1239). oklch(48.5% 0.174 18.2), rgb(171, 31, 55).
Aa
White text reads best on this color (7.04:1).
About this color
#AB1F37 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.174 and its hue 18°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.013 away. White text reads best on it, at 7.04:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.174) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 2.98:1 |
| White text | 7.04:1 |
Values
| HEX | #AB1F37 |
| RGB | rgb(171, 31, 55) |
| HSL | hsl(350, 69%, 40%) |
| OKLCH | oklch(48.5% 0.174 18.2) |
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 #AB1F37 | 7.04:1 | AAA | Lc -87.8 | Fine for body text |
| Black text on #AB1F37 | 2.98:1 | Fails | Lc 21.2 | Dividers and decoration only |
| #AB1F37 text on white | 7.04:1 | AAA | Lc 82.8 | Fine for body text |
| #AB1F37 text on black | 2.98:1 | Fails | Lc -19.1 | 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
#FAE4E4
oklch(93.7% 0.024 17.6)
-
Step 200
200
#F7CDCD
oklch(88.4% 0.048 18.1)
-
Step 300
300
#F2ABAC
oklch(80.9% 0.084 18.1)
-
Step 400
400
#E87B80
oklch(70.7% 0.135 18.2)
-
Step 500
500
#DE5460
oklch(63.1% 0.172 18.4)
-
Step 600
600
#C93247
oklch(55.6% 0.186 18.4)
-
Step 700
700 (this color)
#AB1F37
oklch(48.5% 0.174 18.2)
-
Step 800
800
#8D1F2F
oklch(42.7% 0.144 18.3)
-
Step 900
900
#71212A
oklch(37.6% 0.112 18)
-
Step 950
950
#431519
oklch(27.1% 0.071 18)
#AB1F37 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) | #4A4637 | 0.193 |
| Deuteranopia (no green cones) | #6D6333 | 0.175 |
| Tritanopia (no blue cones) | #BC002A | 0.036 |
| Achromatopsia (no color) | #595959 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AB1F37
#AB1F37
oklch(48.5% 0.174 18.2)
- #006D70
#006D70
oklch(48.5% 0.083 198.1)
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 #AB1F37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.013
- Brown #A52A2A ΔE 0.026
- Firebrick #B22222 ΔE 0.030
- Rufous #AE2012 ΔE 0.037
- Raspberry #B00149 ΔE 0.037
- Auburn #9B2226 ΔE 0.039
- Rose Red #BE013C ΔE 0.039
- Lipstick Red #C0022F ΔE 0.042
Use #AB1F37 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.