#B9181E
Closest named color: Scarlet (#BE0119). oklch(50.3% 0.192 26.5), rgb(185, 24, 30).
Aa
White text reads best on this color (6.53:1).
About this color
#B9181E is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.192 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.013 away. White text reads best on it, at 6.53:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.192) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.21:1 |
| White text | 6.53:1 |
Values
| HEX | #B9181E |
| RGB | rgb(185, 24, 30) |
| HSL | hsl(358, 77%, 41%) |
| OKLCH | oklch(50.3% 0.192 26.5) |
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 #B9181E | 6.53:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #B9181E | 3.21:1 | AA large text | Lc 23.7 | Dividers and decoration only |
| #B9181E text on white | 6.53:1 | AA | Lc 80.4 | Fine for body text |
| #B9181E text on black | 3.21:1 | AA large text | Lc -21.5 | 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
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FCE4E0
oklch(93.7% 0.027 28.9)
-
Step 200
200
#FACDC7
oklch(88.6% 0.052 27)
-
Step 300
300
#F7AAA1
oklch(81% 0.092 26.7)
-
Step 400
400
#EF786D
oklch(70.7% 0.149 26.9)
-
Step 500
500
#E64D46
oklch(63.1% 0.19 26.7)
-
Step 600
600
#D12427
oklch(55.6% 0.206 26.6)
-
Step 700
700 (this color)
#B9181E
oklch(50.3% 0.192 26.5)
-
Step 800
800
#931518
oklch(42.8% 0.16 26.5)
-
Step 900
900
#761C1A
oklch(37.7% 0.125 26.5)
-
Step 950
950
#451310
oklch(27% 0.078 27)
#B9181E 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) | #50481C | 0.211 |
| Deuteranopia (no green cones) | #776914 | 0.189 |
| Tritanopia (no blue cones) | #CC001D | 0.037 |
| Achromatopsia (no color) | #5D5D5D | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B9181E
#B9181E
oklch(50.3% 0.192 26.5)
- #00727D
#00727D
oklch(50.4% 0.086 206.5)
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 #B9181E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.013
- Firebrick #B22222 ΔE 0.014
- Rufous #AE2012 ΔE 0.025
- Lipstick Red #C0022F ΔE 0.025
- Rusty Red #AF2F0D ΔE 0.034
- Rust Red #AA2704 ΔE 0.037
- Rose Red #BE013C ΔE 0.039
- Brown #A52A2A ΔE 0.040
Use #B9181E 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.