#B6431A
Closest named color: Sinopia (#BB3E03). oklch(53.7% 0.158 38.3), rgb(182, 67, 26).
Aa
White text reads best on this color (5.51:1).
About this color
#B6431A is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.158 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.013 away. White text reads best on it, at 5.51:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.158) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.80:1 |
| White text | 5.51:1 |
Values
| HEX | #B6431A |
| RGB | rgb(182, 67, 26) |
| HSL | hsl(16, 75%, 41%) |
| OKLCH | oklch(53.7% 0.158 38.3) |
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 #B6431A | 5.51:1 | AA | Lc -82.0 | Fine for body text |
| Black text on #B6431A | 3.80:1 | AA large text | Lc 27.4 | Dividers and decoration only |
| #B6431A text on white | 5.51:1 | AA | Lc 76.6 | Fine for body text |
| #B6431A text on black | 3.80:1 | AA large text | Lc -25.1 | 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
#F7E6E0
oklch(93.7% 0.02 40.5)
-
Step 200
200
#F2D1C7
oklch(88.6% 0.04 37.5)
-
Step 300
300
#EAB1A0
oklch(80.8% 0.071 37.3)
-
Step 400
400
#DD876B
oklch(70.8% 0.113 38.8)
-
Step 500
500
#D16543
oklch(63% 0.145 38.1)
-
Step 600
600 (this color)
#B6431A
oklch(53.7% 0.158 38.3)
-
Step 700
700
#A23913
oklch(49% 0.147 38.2)
-
Step 800
800
#843114
oklch(42.8% 0.121 38.5)
-
Step 900
900
#6A2C18
oklch(37.7% 0.094 38.2)
-
Step 950
950
#3E1B0F
oklch(27% 0.059 39.4)
#B6431A 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) | #645813 | 0.158 |
| Deuteranopia (no green cones) | #817214 | 0.142 |
| Tritanopia (no blue cones) | #C9233B | 0.069 |
| Achromatopsia (no color) | #696969 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B6431A
#B6431A
oklch(53.7% 0.158 38.3)
- #007A93
#007A93
oklch(53.5% 0.097 218.8)
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 #B6431A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.013
- Brick Orange #C14A09 ΔE 0.029
- Cinnamon #AC4F06 ΔE 0.033
- Burnt Orange #C04E01 ΔE 0.035
- Burnt Siena #B75203 ΔE 0.035
- Rusty Red #AF2F0D ΔE 0.039
- Dull Red #BB3F3F ΔE 0.040
- Burnt Umber #A0450E ΔE 0.044
Use #B6431A 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.