#B2251E
Closest named color: Firebrick (#B22222). oklch(49.9% 0.178 28.5), rgb(178, 37, 30).
Aa
White text reads best on this color (6.61:1).
About this color
#B2251E is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.178 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.006 away. White text reads best on it, at 6.61:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.178) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.17:1 |
| White text | 6.61:1 |
Values
| HEX | #B2251E |
| RGB | rgb(178, 37, 30) |
| HSL | hsl(3, 71%, 41%) |
| OKLCH | oklch(49.9% 0.178 28.5) |
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 #B2251E | 6.61:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #B2251E | 3.17:1 | AA large text | Lc 22.9 | Dividers and decoration only |
| #B2251E text on white | 6.61:1 | AA | Lc 81.1 | Fine for body text |
| #B2251E text on black | 3.17:1 | AA large text | Lc -20.7 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E1
oklch(93.6% 0.025 26.9)
-
Step 200
200
#F7CEC7
oklch(88.5% 0.048 29.4)
-
Step 300
300
#F3ACA1
oklch(80.9% 0.086 28.9)
-
Step 400
400
#EA7C6E
oklch(70.7% 0.138 28.6)
-
Step 500
500
#E05548
oklch(63.1% 0.176 28.4)
-
Step 600
600
#CB3229
oklch(55.6% 0.191 28.5)
-
Step 700
700 (this color)
#B2251E
oklch(49.9% 0.178 28.5)
-
Step 800
800
#8E2019
oklch(42.7% 0.147 28.7)
-
Step 900
900
#72221B
oklch(37.7% 0.114 28.6)
-
Step 950
950
#431511
oklch(26.9% 0.072 27.9)
#B2251E 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) | #52491B | 0.192 |
| Deuteranopia (no green cones) | #756816 | 0.174 |
| Tritanopia (no blue cones) | #C50025 | 0.041 |
| Achromatopsia (no color) | #5D5D5D | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B2251E
#B2251E
oklch(49.9% 0.178 28.5)
- #00707D
#00707D
oklch(49.9% 0.086 208.8)
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 #B2251E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.006
- Rufous #AE2012 ΔE 0.013
- Rusty Red #AF2F0D ΔE 0.020
- Rust Red #AA2704 ΔE 0.023
- Brown #A52A2A ΔE 0.027
- Scarlet #BE0119 ΔE 0.029
- Brick #A03623 ΔE 0.038
- Lipstick Red #C0022F ΔE 0.040
Use #B2251E 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.