#B5400B
Closest named color: Sinopia (#BB3E03). oklch(53% 0.162 39.8), rgb(181, 64, 11).
Aa
White text reads best on this color (5.67:1).
About this color
#B5400B is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.162 and its hue 40°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.011 away. White text reads best on it, at 5.67:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.162) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.70:1 |
| White text | 5.67:1 |
Values
| HEX | #B5400B |
| RGB | rgb(181, 64, 11) |
| HSL | hsl(19, 89%, 38%) |
| OKLCH | oklch(53% 0.162 39.8) |
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 #B5400B | 5.67:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #B5400B | 3.70:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #B5400B text on white | 5.67:1 | AA | Lc 77.4 | Fine for body text |
| #B5400B text on black | 3.70:1 | AA large text | Lc -24.4 | 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 600.
-
Step 50
50
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F7E6E0
oklch(93.7% 0.02 40.5)
-
Step 200
200
#F2D1C6
oklch(88.5% 0.04 39.3)
-
Step 300
300
#EBB19E
oklch(80.9% 0.073 38.9)
-
Step 400
400
#DE8668
oklch(70.7% 0.117 39.5)
-
Step 500
500
#D2653D
oklch(63.1% 0.148 40.1)
-
Step 600
600 (this color)
#B5400B
oklch(53% 0.162 39.8)
-
Step 700
700
#A33908
oklch(49.1% 0.15 40)
-
Step 800
800
#85300D
oklch(42.8% 0.125 39.8)
-
Step 900
900
#6B2C14
oklch(37.8% 0.097 40.2)
-
Step 950
950
#3F1A0D
oklch(27% 0.062 39.6)
#B5400B 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) | #635600 | 0.160 |
| Deuteranopia (no green cones) | #7F7100 | 0.146 |
| Tritanopia (no blue cones) | #C81D37 | 0.072 |
| Achromatopsia (no color) | #676767 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B5400B
#B5400B
oklch(53% 0.162 39.8)
- #007892
#007892
oklch(53% 0.096 219.9)
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 #B5400B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.011
- Cinnamon #AC4F06 ΔE 0.033
- Brick Orange #C14A09 ΔE 0.033
- Rusty Red #AF2F0D ΔE 0.034
- Burnt Siena #B75203 ΔE 0.038
- Burnt Orange #C04E01 ΔE 0.039
- Burnt Umber #A0450E ΔE 0.041
- Russet #A13905 ΔE 0.045
Use #B5400B 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.