#B91C1A
Closest named color: Firebrick (#B22222). oklch(50.5% 0.191 28), rgb(185, 28, 26).
Aa
White text reads best on this color (6.47:1).
About this color
#B91C1A is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.191 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.014 away. White text reads best on it, at 6.47:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.191) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.24:1 |
| White text | 6.47:1 |
Values
| HEX | #B91C1A |
| RGB | rgb(185, 28, 26) |
| HSL | hsl(1, 75%, 41%) |
| OKLCH | oklch(50.5% 0.191 28) |
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 #B91C1A | 6.47:1 | AA | Lc -85.4 | Fine for body text |
| Black text on #B91C1A | 3.24:1 | AA large text | Lc 23.8 | Dividers and decoration only |
| #B91C1A text on white | 6.47:1 | AA | Lc 80.2 | Fine for body text |
| #B91C1A text on black | 3.24:1 | AA large text | Lc -21.6 | 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
#FBE4E0
oklch(93.6% 0.026 29.4)
-
Step 200
200
#F9CDC7
oklch(88.5% 0.051 27.2)
-
Step 300
300
#F7AA9F
oklch(80.9% 0.093 28.3)
-
Step 400
400
#EE796B
oklch(70.7% 0.147 28.4)
-
Step 500
500
#E54E43
oklch(63.1% 0.189 27.9)
-
Step 600
600
#D02622
oklch(55.5% 0.205 28)
-
Step 700
700 (this color)
#B91C1A
oklch(50.5% 0.191 28)
-
Step 800
800
#921715
oklch(42.7% 0.158 27.8)
-
Step 900
900
#751D18
oklch(37.6% 0.123 27.9)
-
Step 950
950
#45130F
oklch(26.9% 0.078 28)
#B91C1A 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) | #524817 | 0.207 |
| Deuteranopia (no green cones) | #776A0F | 0.188 |
| Tritanopia (no blue cones) | #CC001F | 0.038 |
| Achromatopsia (no color) | #5E5E5E | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B91C1A
#B91C1A
oklch(50.5% 0.191 28)
- #00727F
#00727F
oklch(50.5% 0.087 208.6)
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 #B91C1A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.014
- Scarlet #BE0119 ΔE 0.016
- Rufous #AE2012 ΔE 0.023
- Lipstick Red #C0022F ΔE 0.030
- Rusty Red #AF2F0D ΔE 0.030
- Rust Red #AA2704 ΔE 0.034
- Brown #A52A2A ΔE 0.040
- Rose Red #BE013C ΔE 0.043
Use #B91C1A 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.