#B11531
Closest named color: Rouge (#AB1239). oklch(48.9% 0.185 19.9), rgb(177, 21, 49).
Aa
White text reads best on this color (6.95:1).
About this color
#B11531 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.185 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Rouge (#AB1239), ΔE 0.018 away. White text reads best on it, at 6.95:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.185) |
| Temperature | warm |
| Nearest name | Rouge (#AB1239) |
| Black text | 3.02:1 |
| White text | 6.95:1 |
Values
| HEX | #B11531 |
| RGB | rgb(177, 21, 49) |
| HSL | hsl(349, 79%, 39%) |
| OKLCH | oklch(48.9% 0.185 19.9) |
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 #B11531 | 6.95:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #B11531 | 3.02:1 | AA large text | Lc 22.0 | Dividers and decoration only |
| #B11531 text on white | 6.95:1 | AA | Lc 82.1 | Fine for body text |
| #B11531 text on black | 3.02:1 | AA large text | Lc -19.8 | 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
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FBE3E3
oklch(93.5% 0.026 17.6)
-
Step 200
200
#F9CDCC
oklch(88.6% 0.05 19.7)
-
Step 300
300
#F5AAA9
oklch(81% 0.089 20)
-
Step 400
400
#EC787B
oklch(70.6% 0.143 19.8)
-
Step 500
500
#E34F5A
oklch(63.2% 0.183 19.9)
-
Step 600
600
#CE2840
oklch(55.6% 0.199 19.7)
-
Step 700
700 (this color)
#B11531
oklch(48.9% 0.185 19.9)
-
Step 800
800
#90182A
oklch(42.6% 0.153 19.6)
-
Step 900
900
#741E26
oklch(37.8% 0.119 20)
-
Step 950
950
#441316
oklch(26.9% 0.075 20.3)
#B11531 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) | #4A4531 | 0.206 |
| Deuteranopia (no green cones) | #70652C | 0.187 |
| Tritanopia (no blue cones) | #C30023 | 0.038 |
| Achromatopsia (no color) | #595959 | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B11531
#B11531
oklch(48.9% 0.185 19.9)
- #006E73
#006E73
oklch(48.9% 0.083 200.3)
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 #B11531, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rouge #AB1239 ΔE 0.018
- Firebrick #B22222 ΔE 0.024
- Lipstick Red #C0022F ΔE 0.030
- Rose Red #BE013C ΔE 0.030
- Brown #A52A2A ΔE 0.032
- Scarlet #BE0119 ΔE 0.033
- Rufous #AE2012 ΔE 0.034
- Raspberry #B00149 ΔE 0.039
Use #B11531 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.