#B0131D
Closest named color: Firebrick (#B22222). oklch(48.4% 0.187 25.9), rgb(176, 19, 29).
Aa
White text reads best on this color (7.10:1).
About this color
#B0131D is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.187 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.015 away. White text reads best on it, at 7.10:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.187) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 2.95:1 |
| White text | 7.10:1 |
Values
| HEX | #B0131D |
| RGB | rgb(176, 19, 29) |
| HSL | hsl(356, 81%, 38%) |
| OKLCH | oklch(48.4% 0.187 25.9) |
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 #B0131D | 7.10:1 | AAA | Lc -87.6 | Fine for body text |
| Black text on #B0131D | 2.95:1 | Fails | Lc 21.5 | Dividers and decoration only |
| #B0131D text on white | 7.10:1 | AAA | Lc 82.6 | Fine for body text |
| #B0131D text on black | 2.95:1 | Fails | Lc -19.4 | 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
#FEF3F1
oklch(97.2% 0.012 29.9)
-
Step 100
100
#FBE4E1
oklch(93.7% 0.026 26.5)
-
Step 200
200
#F9CDC8
oklch(88.5% 0.05 25.7)
-
Step 300
300
#F6AAA2
oklch(80.9% 0.091 25.9)
-
Step 400
400
#ED7970
oklch(70.7% 0.145 25.9)
-
Step 500
500
#E4504A
oklch(63.2% 0.185 26.2)
-
Step 600
600
#CF292D
oklch(55.6% 0.201 25.8)
-
Step 700
700 (this color)
#B0131D
oklch(48.4% 0.187 25.9)
-
Step 800
800
#91191C
oklch(42.7% 0.155 25.8)
-
Step 900
900
#741E1D
oklch(37.6% 0.12 25.6)
-
Step 950
950
#451311
oklch(27% 0.077 26)
#B0131D 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) | #4B431B | 0.205 |
| Deuteranopia (no green cones) | #706414 | 0.186 |
| Tritanopia (no blue cones) | #C2001A | 0.036 |
| Achromatopsia (no color) | #585858 | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B0131D
#B0131D
oklch(48.4% 0.187 25.9)
- #006C75
#006C75
oklch(48.5% 0.083 204.9)
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 #B0131D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.015
- Rufous #AE2012 ΔE 0.016
- Brown #A52A2A ΔE 0.027
- Scarlet #BE0119 ΔE 0.028
- Rust Red #AA2704 ΔE 0.029
- Rouge #AB1239 ΔE 0.034
- Rusty Red #AF2F0D ΔE 0.036
- Lipstick Red #C0022F ΔE 0.038
Use #B0131D 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.