#B9040A
Closest named color: Scarlet (#BE0119). oklch(49.5% 0.201 28.4), rgb(185, 4, 10).
Aa
White text reads best on this color (6.80:1).
About this color
#B9040A is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.201 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.014 away. White text reads best on it, at 6.80:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.201) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.08:1 |
| White text | 6.80:1 |
Values
| HEX | #B9040A |
| RGB | rgb(185, 4, 10) |
| HSL | hsl(358, 96%, 37%) |
| OKLCH | oklch(49.5% 0.201 28.4) |
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 #B9040A | 6.80:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #B9040A | 3.08:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #B9040A text on white | 6.80:1 | AA | Lc 80.9 | Fine for body text |
| #B9040A text on black | 3.08:1 | AA large text | Lc -21.0 | 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
#FCE3DF
oklch(93.5% 0.028 28.5)
-
Step 200
200
#FBCCC5
oklch(88.4% 0.054 28.1)
-
Step 300
300
#F9A99D
oklch(80.9% 0.097 28.8)
-
Step 400
400
#F27667
oklch(70.7% 0.155 28.6)
-
Step 500
500
#E9493D
oklch(63.1% 0.199 28.4)
-
Step 600
600
#D51A18
oklch(55.7% 0.216 28.4)
-
Step 700
700 (this color)
#B9040A
oklch(49.5% 0.201 28.4)
-
Step 800
800
#950E0D
oklch(42.7% 0.166 28.3)
-
Step 900
900
#781914
oklch(37.7% 0.13 28.3)
-
Step 950
950
#47110D
oklch(27% 0.083 28.2)
#B9040A 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) | #4D4304 | 0.221 |
| Deuteranopia (no green cones) | #756700 | 0.196 |
| Tritanopia (no blue cones) | #CD000D | 0.042 |
| Achromatopsia (no color) | #5B5B5B | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B9040A
#B9040A
oklch(49.5% 0.201 28.4)
- #006F7B
#006F7B
oklch(49.5% 0.085 207.8)
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 #B9040A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.014
- Firebrick #B22222 ΔE 0.022
- Rufous #AE2012 ΔE 0.024
- Lipstick Red #C0022F ΔE 0.032
- Rust Red #AA2704 ΔE 0.036
- Rusty Red #AF2F0D ΔE 0.037
- Brown #A52A2A ΔE 0.044
- Rose Red #BE013C ΔE 0.046
Use #B9040A 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.