#B41823
Closest named color: Firebrick (#B22222). oklch(49.4% 0.187 25), rgb(180, 24, 35).
Aa
White text reads best on this color (6.78:1).
About this color
#B41823 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.187 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.010 away. White text reads best on it, at 6.78:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.187) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.09:1 |
| White text | 6.78:1 |
Values
| HEX | #B41823 |
| RGB | rgb(180, 24, 35) |
| HSL | hsl(356, 76%, 40%) |
| OKLCH | oklch(49.4% 0.187 25) |
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 #B41823 | 6.78:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #B41823 | 3.09:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #B41823 text on white | 6.78:1 | AA | Lc 81.5 | Fine for body text |
| #B41823 text on black | 3.09:1 | AA large text | Lc -20.4 | 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
#F6AAA3
oklch(80.9% 0.091 25.1)
-
Step 400
400
#ED7972
oklch(70.7% 0.144 24.9)
-
Step 500
500
#E44F4C
oklch(63.1% 0.186 25.2)
-
Step 600
600
#CF282F
oklch(55.6% 0.201 25.1)
-
Step 700
700 (this color)
#B41823
oklch(49.4% 0.187 25)
-
Step 800
800
#91181E
oklch(42.6% 0.155 24.9)
-
Step 900
900
#751E1E
oklch(37.8% 0.121 25.1)
-
Step 950
950
#451312
oklch(27% 0.077 24.9)
#B41823 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) | #4E4621 | 0.205 |
| Deuteranopia (no green cones) | #73671B | 0.187 |
| Tritanopia (no blue cones) | #C7001F | 0.037 |
| Achromatopsia (no color) | #5B5B5B | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B41823
#B41823
oklch(49.4% 0.187 25)
- #006F78
#006F78
oklch(49.4% 0.084 204.6)
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 #B41823, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.010
- Rufous #AE2012 ΔE 0.020
- Scarlet #BE0119 ΔE 0.020
- Lipstick Red #C0022F ΔE 0.029
- Brown #A52A2A ΔE 0.031
- Rust Red #AA2704 ΔE 0.034
- Rusty Red #AF2F0D ΔE 0.035
- Rouge #AB1239 ΔE 0.035
Use #B41823 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.