#B9381F
Closest named color: Sinopia (#BB3E03). oklch(52.9% 0.17 33), rgb(185, 56, 31).
Aa
White text reads best on this color (5.75:1).
About this color
#B9381F is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.170 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.020 away. White text reads best on it, at 5.75:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.170) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.64:1 |
| White text | 5.75:1 |
Values
| HEX | #B9381F |
| RGB | rgb(185, 56, 31) |
| HSL | hsl(10, 71%, 42%) |
| OKLCH | oklch(52.9% 0.17 33) |
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 #B9381F | 5.75:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #B9381F | 3.64:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #B9381F text on white | 5.75:1 | AA | Lc 77.6 | Fine for body text |
| #B9381F text on black | 3.64:1 | AA large text | Lc -24.1 | 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 600.
-
Step 50
50
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E1
oklch(93.6% 0.022 31.8)
-
Step 200
200
#F4D0C7
oklch(88.6% 0.043 34.3)
-
Step 300
300
#EEAFA1
oklch(80.9% 0.077 32.9)
-
Step 400
400
#E2836E
oklch(70.8% 0.122 33.4)
-
Step 500
500
#D75F47
oklch(63.1% 0.156 33)
-
Step 600
600 (this color)
#B9381F
oklch(52.9% 0.17 33)
-
Step 700
700
#A7321B
oklch(49.1% 0.157 33)
-
Step 800
800
#882B19
oklch(42.8% 0.13 33)
-
Step 900
900
#6D281B
oklch(37.6% 0.101 32.6)
-
Step 950
950
#401810
oklch(26.8% 0.065 32.9)
#B9381F 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) | #5E541A | 0.178 |
| Deuteranopia (no green cones) | #7E7018 | 0.161 |
| Tritanopia (no blue cones) | #CC0334 | 0.062 |
| Achromatopsia (no color) | #666666 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B9381F
#B9381F
oklch(52.9% 0.17 33)
- #00798B
#00798B
oklch(52.9% 0.092 212.7)
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 #B9381F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.020
- Rusty Red #AF2F0D ΔE 0.028
- Dull Red #BB3F3F ΔE 0.031
- Firebrick #B22222 ΔE 0.039
- Brick Orange #C14A09 ΔE 0.043
- Rufous #AE2012 ΔE 0.044
- Rust Red #AA2704 ΔE 0.045
- Scarlet #BE0119 ΔE 0.048
Use #B9381F 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.