#B73039
Closest named color: Dull Red (#BB3F3F). oklch(52.1% 0.171 22.1), rgb(183, 48, 57).
Aa
White text reads best on this color (6.00:1).
About this color
#B73039 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.171 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.027 away. White text reads best on it, at 6.00:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.171) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.49:1 |
| White text | 6.00:1 |
Values
| HEX | #B73039 |
| RGB | rgb(183, 48, 57) |
| HSL | hsl(356, 58%, 45%) |
| OKLCH | oklch(52.1% 0.171 22.1) |
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 #B73039 | 6.00:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #B73039 | 3.49:1 | AA large text | Lc 25.3 | Dividers and decoration only |
| #B73039 text on white | 6.00:1 | AA | Lc 78.8 | Fine for body text |
| #B73039 text on black | 3.49:1 | AA large text | Lc -23.0 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#FAE4E3
oklch(93.6% 0.024 20.7)
-
Step 200
200
#F6CECB
oklch(88.5% 0.046 23.1)
-
Step 300
300
#F2ACA9
oklch(81% 0.083 21.8)
-
Step 400
400
#E77D7B
oklch(70.7% 0.131 22.1)
-
Step 500
500
#DD5659
oklch(63.1% 0.169 22)
-
Step 600
600
#C8343F
oklch(55.5% 0.184 21.8)
-
Step 700
700 (this color)
#B73039
oklch(52.1% 0.171 22.1)
-
Step 800
800
#8C2229
oklch(42.7% 0.141 22.2)
-
Step 900
900
#712325
oklch(37.8% 0.11 22.7)
-
Step 950
950
#421616
oklch(27% 0.069 22.8)
#B73039 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) | #575138 | 0.186 |
| Deuteranopia (no green cones) | #796E35 | 0.171 |
| Tritanopia (no blue cones) | #C90035 | 0.043 |
| Achromatopsia (no color) | #636363 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B73039
#B73039
oklch(52.1% 0.171 22.1)
- #00787F
#00787F
oklch(52.1% 0.089 201.9)
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 #B73039, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.027
- Firebrick #B22222 ΔE 0.029
- Lipstick Red #C0022F ΔE 0.035
- Scarlet #BE0119 ΔE 0.039
- Rose Red #BE013C ΔE 0.040
- Rusty Red #AF2F0D ΔE 0.042
- Dusty Red #B9484E ΔE 0.043
- Brown #A52A2A ΔE 0.043
Use #B73039 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.