#B72B15
Closest named color: Rusty Red (#AF2F0D). oklch(51.2% 0.18 31.7), rgb(183, 43, 21).
Aa
White text reads best on this color (6.23:1).
About this color
#B72B15 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.180 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.017 away. White text reads best on it, at 6.23:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.180) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.36:1 |
| White text | 6.23:1 |
Values
| HEX | #B72B15 |
| RGB | rgb(183, 43, 21) |
| HSL | hsl(8, 79%, 40%) |
| OKLCH | oklch(51.2% 0.18 31.7) |
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 #B72B15 | 6.23:1 | AA | Lc -84.8 | Fine for body text |
| Black text on #B72B15 | 3.36:1 | AA large text | Lc 24.5 | Dividers and decoration only |
| #B72B15 text on white | 6.23:1 | AA | Lc 79.6 | Fine for body text |
| #B72B15 text on black | 3.36:1 | AA large text | Lc -22.2 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E0
oklch(93.6% 0.025 29.9)
-
Step 200
200
#F7CEC6
oklch(88.4% 0.048 30.9)
-
Step 300
300
#F3AC9E
oklch(80.8% 0.087 31.5)
-
Step 400
400
#EA7D68
oklch(70.7% 0.139 32.1)
-
Step 500
500
#E0553F
oklch(63% 0.178 31.4)
-
Step 600
600
#CC331B
oklch(55.7% 0.193 31.7)
-
Step 700
700 (this color)
#B72B15
oklch(51.2% 0.18 31.7)
-
Step 800
800
#8F200F
oklch(42.8% 0.149 31.6)
-
Step 900
900
#732215
oklch(37.8% 0.116 31.8)
-
Step 950
950
#44150E
oklch(27% 0.074 30.9)
#B72B15 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) | #574D0F | 0.191 |
| Deuteranopia (no green cones) | #7A6C09 | 0.173 |
| Tritanopia (no blue cones) | #CA0028 | 0.048 |
| Achromatopsia (no color) | #616161 | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B72B15
#B72B15
oklch(51.2% 0.18 31.7)
- #007484
#007484
oklch(51.3% 0.089 211.4)
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 #B72B15, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.017
- Firebrick #B22222 ΔE 0.022
- Rufous #AE2012 ΔE 0.026
- Rust Red #AA2704 ΔE 0.030
- Scarlet #BE0119 ΔE 0.032
- Sinopia #BB3E03 ΔE 0.036
- Brown #A52A2A ΔE 0.041
- Dull Red #BB3F3F ΔE 0.044
Use #B72B15 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.