#B73937
Closest named color: Dull Red (#BB3F3F). oklch(53% 0.163 25.4), rgb(183, 57, 55).
Aa
White text reads best on this color (5.74:1).
About this color
#B73937 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.163 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.015 away. White text reads best on it, at 5.74:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.163) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.65:1 |
| White text | 5.74:1 |
Values
| HEX | #B73937 |
| RGB | rgb(183, 57, 55) |
| HSL | hsl(1, 54%, 47%) |
| OKLCH | oklch(53% 0.163 25.4) |
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 #B73937 | 5.74:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #B73937 | 3.65:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #B73937 text on white | 5.74:1 | AA | Lc 77.7 | Fine for body text |
| #B73937 text on black | 3.65:1 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F8E5E3
oklch(93.7% 0.021 24.8)
-
Step 200
200
#F3CFCC
oklch(88.4% 0.041 23.6)
-
Step 300
300
#ECAFA9
oklch(80.9% 0.072 25.2)
-
Step 400
400
#E0827B
oklch(70.6% 0.117 25)
-
Step 500
500
#D55F59
oklch(63.1% 0.15 25.2)
-
Step 600
600 (this color)
#B73937
oklch(53% 0.163 25.4)
-
Step 700
700
#A53231
oklch(49% 0.151 25.1)
-
Step 800
800
#862B29
oklch(42.6% 0.125 25.3)
-
Step 900
900
#6C2825
oklch(37.6% 0.098 25.4)
-
Step 950
950
#401916
oklch(27.1% 0.062 26.4)
#B73937 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) | #5C5536 | 0.175 |
| Deuteranopia (no green cones) | #7C7033 | 0.160 |
| Tritanopia (no blue cones) | #C9133A | 0.049 |
| Achromatopsia (no color) | #666666 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B73937
#B73937
oklch(53% 0.163 25.4)
- #007A85
#007A85
oklch(52.9% 0.09 205.8)
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 #B73937, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.015
- Dusty Red #B9484E ΔE 0.034
- Firebrick #B22222 ΔE 0.037
- Rusty Red #AF2F0D ΔE 0.039
- Sinopia #BB3E03 ΔE 0.041
- Rufous #AE2012 ΔE 0.048
- Lipstick Red #C0022F ΔE 0.048
- Dark Rose #B5485D ΔE 0.048
Use #B73937 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.