#B6400F
Closest named color: Sinopia (#BB3E03). oklch(53.2% 0.162 39.1), rgb(182, 64, 15).
Aa
White text reads best on this color (5.63:1).
About this color
#B6400F is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.162 and its hue 39°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.010 away. White text reads best on it, at 5.63:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.162) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.72:1 |
| White text | 5.63:1 |
Values
| HEX | #B6400F |
| RGB | rgb(182, 64, 15) |
| HSL | hsl(18, 85%, 39%) |
| OKLCH | oklch(53.2% 0.162 39.1) |
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 #B6400F | 5.63:1 | AA | Lc -82.5 | Fine for body text |
| Black text on #B6400F | 3.72:1 | AA large text | Lc 26.9 | Dividers and decoration only |
| #B6400F text on white | 5.63:1 | AA | Lc 77.1 | Fine for body text |
| #B6400F text on black | 3.72:1 | AA large text | Lc -24.6 | 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
#F7E5E0
oklch(93.5% 0.021 36)
-
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
#DE8669
oklch(70.7% 0.116 39)
-
Step 500
500
#D3643E
oklch(63.1% 0.15 39.1)
-
Step 600
600 (this color)
#B6400F
oklch(53.2% 0.162 39.1)
-
Step 700
700
#A4380A
oklch(49.2% 0.151 39.1)
-
Step 800
800
#852F0F
oklch(42.7% 0.125 38.7)
-
Step 900
900
#6B2B15
oklch(37.6% 0.098 38.8)
-
Step 950
950
#3F1A0E
oklch(27% 0.062 38.5)
#B6400F 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) | #635702 | 0.162 |
| Deuteranopia (no green cones) | #807104 | 0.146 |
| Tritanopia (no blue cones) | #C91C38 | 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°).
- #B6400F
#B6400F
oklch(53.2% 0.162 39.1)
- #007992
#007992
oklch(53.2% 0.096 218.9)
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 #B6400F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.010
- Brick Orange #C14A09 ΔE 0.032
- Cinnamon #AC4F06 ΔE 0.034
- Rusty Red #AF2F0D ΔE 0.035
- Burnt Orange #C04E01 ΔE 0.038
- Burnt Siena #B75203 ΔE 0.038
- Burnt Umber #A0450E ΔE 0.043
- Dull Red #BB3F3F ΔE 0.044
Use #B6400F 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.