#B0240B
Closest named color: Rufous (#AE2012). oklch(49.3% 0.179 32), rgb(176, 36, 11).
Aa
White text reads best on this color (6.76:1).
About this color
#B0240B is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.179 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.009 away. White text reads best on it, at 6.76:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.179) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 3.10:1 |
| White text | 6.76:1 |
Values
| HEX | #B0240B |
| RGB | rgb(176, 36, 11) |
| HSL | hsl(9, 88%, 37%) |
| OKLCH | oklch(49.3% 0.179 32) |
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 #B0240B | 6.76:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #B0240B | 3.10:1 | AA large text | Lc 22.4 | Dividers and decoration only |
| #B0240B text on white | 6.76:1 | AA | Lc 81.7 | Fine for body text |
| #B0240B text on black | 3.10:1 | AA large text | Lc -20.2 | 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
#E0563E
oklch(63.1% 0.177 32.1)
-
Step 600
600
#CB331A
oklch(55.5% 0.192 31.9)
-
Step 700
700 (this color)
#B0240B
oklch(49.3% 0.179 32)
-
Step 800
800
#8E210E
oklch(42.7% 0.148 32.2)
-
Step 900
900
#722215
oklch(37.6% 0.115 31.8)
-
Step 950
950
#43160D
oklch(27% 0.072 33.1)
#B0240B 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) | #524803 | 0.191 |
| Deuteranopia (no green cones) | #746600 | 0.171 |
| Tritanopia (no blue cones) | #C30021 | 0.045 |
| Achromatopsia (no color) | #5B5B5B | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B0240B
#B0240B
oklch(49.3% 0.179 32)
- #006E7E
#006E7E
oklch(49.4% 0.086 212.1)
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 #B0240B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.009
- Rust Red #AA2704 ΔE 0.013
- Rusty Red #AF2F0D ΔE 0.014
- Firebrick #B22222 ΔE 0.017
- Brown #A52A2A ΔE 0.030
- Scarlet #BE0119 ΔE 0.035
- Brick #A03623 ΔE 0.036
- Burnt Red #9F2305 ΔE 0.036
Use #B0240B 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.