#B73100
Closest named color: Rusty Red (#AF2F0D). oklch(51.7% 0.177 36), rgb(183, 49, 0).
Aa
White text reads best on this color (6.08:1).
About this color
#B73100 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.177 and its hue 36°. 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 6.08:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.45:1 |
| White text | 6.08:1 |
Values
| HEX | #B73100 |
| RGB | rgb(183, 49, 0) |
| HSL | hsl(16, 100%, 36%) |
| OKLCH | oklch(51.7% 0.177 36) |
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 #B73100 | 6.08:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #B73100 | 3.45:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #B73100 text on white | 6.08:1 | AA | Lc 79.0 | Fine for body text |
| #B73100 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#FAE5DF
oklch(93.7% 0.025 36.5)
-
Step 200
200
#F7CFC4
oklch(88.6% 0.048 35.9)
-
Step 300
300
#F2AD9A
oklch(80.8% 0.086 36)
-
Step 400
400
#E87F62
oklch(70.7% 0.137 36.3)
-
Step 500
500
#DE5934
oklch(63.1% 0.174 36.2)
-
Step 600
600
#CA3700
oklch(55.6% 0.191 36)
-
Step 700
700 (this color)
#B73100
oklch(51.7% 0.177 36)
-
Step 800
800
#8D2400
oklch(42.7% 0.146 36.1)
-
Step 900
900
#72240E
oklch(37.8% 0.115 35.9)
-
Step 950
950
#43160A
oklch(26.9% 0.073 35.8)
#B73100 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) | #5B4F00 | 0.182 |
| Deuteranopia (no green cones) | #7C6D00 | 0.163 |
| Tritanopia (no blue cones) | #CA002A | 0.059 |
| Achromatopsia (no color) | #626262 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B73100
#B73100
oklch(51.7% 0.177 36)
- #007589
#007589
oklch(51.8% 0.091 215.1)
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 #B73100, 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 0.024
- Rust Red #AA2704 ΔE 0.034
- Firebrick #B22222 ΔE 0.035
- Rufous #AE2012 ΔE 0.035
- Russet #A13905 ΔE 0.043
- Scarlet #BE0119 ΔE 0.045
- Brick #A03623 ΔE 0.047
Use #B73100 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.