#B81009
Closest named color: Scarlet (#BE0119). oklch(49.7% 0.197 29.3), rgb(184, 16, 9).
Aa
White text reads best on this color (6.73:1).
About this color
#B81009 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.197 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.016 away. White text reads best on it, at 6.73:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.197) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.11:1 |
| White text | 6.73:1 |
Values
| HEX | #B81009 |
| RGB | rgb(184, 16, 9) |
| HSL | hsl(2, 91%, 38%) |
| OKLCH | oklch(49.7% 0.197 29.3) |
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 #B81009 | 6.73:1 | AA | Lc -86.1 | Fine for body text |
| Black text on #B81009 | 3.11:1 | AA large text | Lc 23.1 | Dividers and decoration only |
| #B81009 text on white | 6.73:1 | AA | Lc 80.9 | Fine for body text |
| #B81009 text on black | 3.11:1 | AA large text | Lc -20.9 | 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
#FEF2F0
oklch(97% 0.013 28.9)
-
Step 100
100
#FCE4DF
oklch(93.7% 0.027 31.7)
-
Step 200
200
#FACDC5
oklch(88.5% 0.052 29.9)
-
Step 300
300
#F8A99D
oklch(80.8% 0.096 28.9)
-
Step 400
400
#F07767
oklch(70.6% 0.152 29.2)
-
Step 500
500
#E74C3C
oklch(63.1% 0.194 29.4)
-
Step 600
600
#D32117
oklch(55.7% 0.211 29.3)
-
Step 700
700 (this color)
#B81009
oklch(49.7% 0.197 29.3)
-
Step 800
800
#94130C
oklch(42.7% 0.163 29.3)
-
Step 900
900
#771B14
oklch(37.7% 0.128 29)
-
Step 950
950
#46120D
oklch(27% 0.081 29)
#B81009 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) | #4F4503 | 0.215 |
| Deuteranopia (no green cones) | #766800 | 0.191 |
| Tritanopia (no blue cones) | #CC0013 | 0.041 |
| Achromatopsia (no color) | #5B5B5B | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B81009
#B81009
oklch(49.7% 0.197 29.3)
- #006F7D
#006F7D
oklch(49.6% 0.086 209.9)
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 #B81009, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.016
- Firebrick #B22222 ΔE 0.019
- Rufous #AE2012 ΔE 0.020
- Rust Red #AA2704 ΔE 0.032
- Rusty Red #AF2F0D ΔE 0.032
- Lipstick Red #C0022F ΔE 0.035
- Brown #A52A2A ΔE 0.042
- Rose Red #BE013C ΔE 0.049
Use #B81009 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.