#B73115
Closest named color: Rusty Red (#AF2F0D). oklch(51.8% 0.175 33.2), rgb(183, 49, 21).
Aa
White text reads best on this color (6.06:1).
About this color
#B73115 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.175 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 6.06:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.175) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.46:1 |
| White text | 6.06:1 |
Values
| HEX | #B73115 |
| RGB | rgb(183, 49, 21) |
| HSL | hsl(10, 79%, 40%) |
| OKLCH | oklch(51.8% 0.175 33.2) |
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 #B73115 | 6.06:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #B73115 | 3.46:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #B73115 text on white | 6.06:1 | AA | Lc 78.9 | Fine for body text |
| #B73115 text on black | 3.46:1 | AA large text | Lc -22.9 | 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
#F7CFC5
oklch(88.6% 0.047 34.3)
-
Step 300
300
#F2AD9D
oklch(80.9% 0.085 33.5)
-
Step 400
400
#E87E68
oklch(70.6% 0.136 32.9)
-
Step 500
500
#DE583D
oklch(63.1% 0.173 33.2)
-
Step 600
600
#CA3718
oklch(55.7% 0.188 33.3)
-
Step 700
700 (this color)
#B73115
oklch(51.8% 0.175 33.2)
-
Step 800
800
#8D230D
oklch(42.7% 0.145 33.1)
-
Step 900
900
#712414
oklch(37.7% 0.112 33.5)
-
Step 950
950
#43160D
oklch(27% 0.072 33.1)
#B73115 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) | #5A4F0E | 0.184 |
| Deuteranopia (no green cones) | #7B6D0A | 0.166 |
| Tritanopia (no blue cones) | #CA002D | 0.056 |
| Achromatopsia (no color) | #626262 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B73115
#B73115
oklch(51.8% 0.175 33.2)
- #007587
#007587
oklch(51.7% 0.09 213.2)
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 #B73115, 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 0.027
- Firebrick #B22222 ΔE 0.029
- Rufous #AE2012 ΔE 0.033
- Rust Red #AA2704 ΔE 0.034
- Scarlet #BE0119 ΔE 0.040
- Dull Red #BB3F3F ΔE 0.041
- Brick #A03623 ΔE 0.045
Use #B73115 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.