#B73609
Closest named color: Sinopia (#BB3E03). oklch(52.2% 0.172 36.4), rgb(183, 54, 9).
Aa
White text reads best on this color (5.92:1).
About this color
#B73609 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.172 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.018 away. White text reads best on it, at 5.92:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.172) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.54:1 |
| White text | 5.92:1 |
Values
| HEX | #B73609 |
| RGB | rgb(183, 54, 9) |
| HSL | hsl(16, 91%, 38%) |
| OKLCH | oklch(52.2% 0.172 36.4) |
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 #B73609 | 5.92:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #B73609 | 3.54:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #B73609 text on white | 5.92:1 | AA | Lc 78.4 | Fine for body text |
| #B73609 text on black | 3.54:1 | AA large text | Lc -23.4 | 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 700.
-
Step 50
50
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F6CFC4
oklch(88.5% 0.047 36.3)
-
Step 300
300
#F1AE9B
oklch(80.9% 0.084 36.5)
-
Step 400
400
#E78064
oklch(70.7% 0.134 36.1)
-
Step 500
500
#DC5B36
oklch(63.1% 0.17 36.6)
-
Step 600
600
#C83B07
oklch(55.7% 0.185 36.5)
-
Step 700
700 (this color)
#B73609
oklch(52.2% 0.172 36.4)
-
Step 800
800
#8C2603
oklch(42.7% 0.143 36.3)
-
Step 900
900
#702510
oklch(37.6% 0.111 36)
-
Step 950
950
#42170B
oklch(26.9% 0.07 36.4)
#B73609 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) | #5D5200 | 0.178 |
| Deuteranopia (no green cones) | #7D6F00 | 0.160 |
| Tritanopia (no blue cones) | #CA002F | 0.065 |
| Achromatopsia (no color) | #646464 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B73609
#B73609
oklch(52.2% 0.172 36.4)
- #00768C
#00768C
oklch(52.2% 0.093 216.8)
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 #B73609, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.018
- Rusty Red #AF2F0D ΔE 0.022
- Rust Red #AA2704 ΔE 0.039
- Firebrick #B22222 ΔE 0.039
- Rufous #AE2012 ΔE 0.041
- Dull Red #BB3F3F ΔE 0.044
- Russet #A13905 ΔE 0.044
- Brick Orange #C14A09 ΔE 0.045
Use #B73609 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.