#B73C37
Closest named color: Dull Red (#BB3F3F). oklch(53.3% 0.16 26.4), rgb(183, 60, 55).
Aa
White text reads best on this color (5.65:1).
About this color
#B73C37 is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.160 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.013 away. White text reads best on it, at 5.65:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.160) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.71:1 |
| White text | 5.65:1 |
Values
| HEX | #B73C37 |
| RGB | rgb(183, 60, 55) |
| HSL | hsl(2, 54%, 47%) |
| OKLCH | oklch(53.3% 0.16 26.4) |
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 #B73C37 | 5.65:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #B73C37 | 3.71:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #B73C37 text on white | 5.65:1 | AA | Lc 77.3 | Fine for body text |
| #B73C37 text on black | 3.71:1 | AA large text | Lc -24.5 | 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
#F3D0CB
oklch(88.6% 0.04 27.5)
-
Step 300
300
#ECAFA8
oklch(80.9% 0.073 26.2)
-
Step 400
400
#DF837A
oklch(70.6% 0.115 26.3)
-
Step 500
500
#D46158
oklch(63.2% 0.147 26.6)
-
Step 600
600 (this color)
#B73C37
oklch(53.3% 0.16 26.4)
-
Step 700
700
#A43430
oklch(49% 0.148 26.2)
-
Step 800
800
#852C28
oklch(42.6% 0.123 26.3)
-
Step 900
900
#6C2925
oklch(37.7% 0.097 26.2)
-
Step 950
950
#3F1916
oklch(27% 0.06 26.4)
#B73C37 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) | #5E5635 | 0.170 |
| Deuteranopia (no green cones) | #7D7133 | 0.157 |
| Tritanopia (no blue cones) | #C91A3C | 0.050 |
| Achromatopsia (no color) | #676767 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B73C37
#B73C37
oklch(53.3% 0.16 26.4)
- #007B87
#007B87
oklch(53.3% 0.091 206.7)
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 #B73C37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.013
- Dusty Red #B9484E ΔE 0.031
- Sinopia #BB3E03 ΔE 0.038
- Rusty Red #AF2F0D ΔE 0.041
- Firebrick #B22222 ΔE 0.041
- Dark Rose #B5485D ΔE 0.048
- Rufous #AE2012 ΔE 0.051
- Brown #A52A2A ΔE 0.052
Use #B73C37 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.