#B72E37
Closest named color: Firebrick (#B22222). oklch(51.8% 0.173 22.4), rgb(183, 46, 55).
Aa
White text reads best on this color (6.07:1).
About this color
#B72E37 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.173 and its hue 22°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.026 away. White text reads best on it, at 6.07:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.173) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.45:1 |
| White text | 6.07:1 |
Values
| HEX | #B72E37 |
| RGB | rgb(183, 46, 55) |
| HSL | hsl(356, 60%, 45%) |
| OKLCH | oklch(51.8% 0.173 22.4) |
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 #B72E37 | 6.07:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #B72E37 | 3.45:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #B72E37 text on white | 6.07:1 | AA | Lc 79.0 | Fine for body text |
| #B72E37 text on black | 3.45:1 | AA large text | Lc -22.8 | 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
#FAE4E2
oklch(93.6% 0.024 23.9)
-
Step 200
200
#F7CECB
oklch(88.6% 0.047 23)
-
Step 300
300
#F2ACA8
oklch(81% 0.083 22.7)
-
Step 400
400
#E87C7A
oklch(70.7% 0.134 22.1)
-
Step 500
500
#DE5558
oklch(63.1% 0.172 22.2)
-
Step 600
600
#C9333D
oklch(55.6% 0.186 22.4)
-
Step 700
700 (this color)
#B72E37
oklch(51.8% 0.173 22.4)
-
Step 800
800
#8D2128
oklch(42.8% 0.143 22.5)
-
Step 900
900
#712225
oklch(37.7% 0.111 22.1)
-
Step 950
950
#431516
oklch(27% 0.071 21.9)
#B72E37 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) | #565036 | 0.189 |
| Deuteranopia (no green cones) | #786D33 | 0.173 |
| Tritanopia (no blue cones) | #C90033 | 0.041 |
| Achromatopsia (no color) | #626262 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B72E37
#B72E37
oklch(51.8% 0.173 22.4)
- #00777E
#00777E
oklch(51.8% 0.088 202)
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 #B72E37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.026
- Dull Red #BB3F3F ΔE 0.029
- Lipstick Red #C0022F ΔE 0.033
- Scarlet #BE0119 ΔE 0.037
- Rose Red #BE013C ΔE 0.038
- Rusty Red #AF2F0D ΔE 0.040
- Rufous #AE2012 ΔE 0.040
- Brown #A52A2A ΔE 0.041
Use #B72E37 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.