#B10D26
Closest named color: Firebrick (#B22222). oklch(48.4% 0.189 22.8), rgb(177, 13, 38).
Aa
White text reads best on this color (7.10:1).
About this color
#B10D26 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.189 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.020 away. White text reads best on it, at 7.10:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.189) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 2.95:1 |
| White text | 7.10:1 |
Values
| HEX | #B10D26 |
| RGB | rgb(177, 13, 38) |
| HSL | hsl(351, 86%, 37%) |
| OKLCH | oklch(48.4% 0.189 22.8) |
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 #B10D26 | 7.10:1 | AAA | Lc -87.5 | Fine for body text |
| Black text on #B10D26 | 2.95:1 | Fails | Lc 21.6 | Dividers and decoration only |
| #B10D26 text on white | 7.10:1 | AAA | Lc 82.4 | Fine for body text |
| #B10D26 text on black | 2.95:1 | Fails | Lc -19.5 | 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
#FBE3E2
oklch(93.5% 0.026 20.5)
-
Step 200
200
#F9CDCA
oklch(88.5% 0.05 22.7)
-
Step 300
300
#F6A9A5
oklch(80.8% 0.092 22.6)
-
Step 400
400
#EE7875
oklch(70.8% 0.146 23)
-
Step 500
500
#E54D51
oklch(63.2% 0.188 22.9)
-
Step 600
600
#D02535
oklch(55.6% 0.204 23)
-
Step 700
700 (this color)
#B10D26
oklch(48.4% 0.189 22.8)
-
Step 800
800
#921622
oklch(42.8% 0.157 23)
-
Step 900
900
#751D21
oklch(37.8% 0.122 22.9)
-
Step 950
950
#451314
oklch(27% 0.077 22.7)
#B10D26 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) | #494325 | 0.210 |
| Deuteranopia (no green cones) | #70641F | 0.190 |
| Tritanopia (no blue cones) | #C3001B | 0.038 |
| Achromatopsia (no color) | #585858 | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B10D26
#B10D26
oklch(48.4% 0.189 22.8)
- #006C73
#006C73
oklch(48.4% 0.082 202.6)
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 #B10D26, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.020
- Rouge #AB1239 ΔE 0.025
- Rufous #AE2012 ΔE 0.026
- Scarlet #BE0119 ΔE 0.028
- Brown #A52A2A ΔE 0.031
- Lipstick Red #C0022F ΔE 0.032
- Rose Red #BE013C ΔE 0.037
- Rust Red #AA2704 ΔE 0.039
Use #B10D26 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.