#B73215
Closest named color: Rusty Red (#AF2F0D). oklch(51.9% 0.174 33.5), rgb(183, 50, 21).
Aa
White text reads best on this color (6.03:1).
About this color
#B73215 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.174 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.018 away. White text reads best on it, at 6.03:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.174) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.48:1 |
| White text | 6.03:1 |
Values
| HEX | #B73215 |
| RGB | rgb(183, 50, 21) |
| HSL | hsl(11, 79%, 40%) |
| OKLCH | oklch(51.9% 0.174 33.5) |
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 #B73215 | 6.03:1 | AA | Lc -84.1 | Fine for body text |
| Black text on #B73215 | 3.48:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #B73215 text on white | 6.03:1 | AA | Lc 78.8 | Fine for body text |
| #B73215 text on black | 3.48:1 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4DF
oklch(93.5% 0.025 32.9)
-
Step 200
200
#F6CFC5
oklch(88.5% 0.046 34.7)
-
Step 300
300
#F2AD9D
oklch(80.9% 0.085 33.5)
-
Step 400
400
#E87F68
oklch(70.8% 0.135 33.4)
-
Step 500
500
#DE593D
oklch(63.2% 0.172 33.6)
-
Step 600
600
#C93718
oklch(55.5% 0.188 33.3)
-
Step 700
700 (this color)
#B73215
oklch(51.9% 0.174 33.5)
-
Step 800
800
#8D240D
oklch(42.8% 0.144 33.5)
-
Step 900
900
#712414
oklch(37.7% 0.112 33.5)
-
Step 950
950
#43160D
oklch(27% 0.072 33.1)
#B73215 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) | #5B500E | 0.182 |
| Deuteranopia (no green cones) | #7B6E0A | 0.167 |
| Tritanopia (no blue cones) | #CA002D | 0.056 |
| Achromatopsia (no color) | #636363 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B73215
#B73215
oklch(51.9% 0.174 33.5)
- #007688
#007688
oklch(52% 0.091 213)
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 #B73215, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.018
- Sinopia #BB3E03 ΔE 0.026
- Firebrick #B22222 ΔE 0.030
- Rufous #AE2012 ΔE 0.034
- Rust Red #AA2704 ΔE 0.035
- Dull Red #BB3F3F ΔE 0.040
- Scarlet #BE0119 ΔE 0.042
- Russet #A13905 ΔE 0.045
Use #B73215 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.