#B71C29
Closest named color: Firebrick (#B22222). oklch(50.3% 0.187 23.9), rgb(183, 28, 41).
Aa
White text reads best on this color (6.53:1).
About this color
#B71C29 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.187 and its hue 24°. 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 6.53:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.187) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.21:1 |
| White text | 6.53:1 |
Values
| HEX | #B71C29 |
| RGB | rgb(183, 28, 41) |
| HSL | hsl(355, 73%, 41%) |
| OKLCH | oklch(50.3% 0.187 23.9) |
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 #B71C29 | 6.53:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #B71C29 | 3.21:1 | AA large text | Lc 23.5 | Dividers and decoration only |
| #B71C29 text on white | 6.53:1 | AA | Lc 80.6 | Fine for body text |
| #B71C29 text on black | 3.21:1 | AA large text | Lc -21.3 | 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
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FBE4E1
oklch(93.7% 0.026 26.5)
-
Step 200
200
#F9CDC9
oklch(88.5% 0.05 24.2)
-
Step 300
300
#F6AAA4
oklch(80.9% 0.091 24.3)
-
Step 400
400
#ED7873
oklch(70.6% 0.145 24)
-
Step 500
500
#E44F4F
oklch(63.2% 0.185 24.1)
-
Step 600
600
#CF2733
oklch(55.6% 0.202 23.8)
-
Step 700
700 (this color)
#B71C29
oklch(50.3% 0.187 23.9)
-
Step 800
800
#911820
oklch(42.7% 0.155 24.1)
-
Step 900
900
#751D20
oklch(37.7% 0.122 23.5)
-
Step 950
950
#451313
oklch(27% 0.077 23.8)
#B71C29 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) | #504828 | 0.205 |
| Deuteranopia (no green cones) | #756922 | 0.188 |
| Tritanopia (no blue cones) | #CA0023 | 0.037 |
| Achromatopsia (no color) | #5D5D5D | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B71C29
#B71C29
oklch(50.3% 0.187 23.9)
- #00727A
#00727A
oklch(50.3% 0.086 203.3)
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 #B71C29, 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 0.019
- Lipstick Red #C0022F ΔE 0.022
- Rufous #AE2012 ΔE 0.027
- Rose Red #BE013C ΔE 0.032
- Brown #A52A2A ΔE 0.036
- Rusty Red #AF2F0D ΔE 0.037
- Rouge #AB1239 ΔE 0.037
Use #B71C29 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.