#B01B0C
Closest named color: Rufous (#AE2012). oklch(48.7% 0.184 30.3), rgb(176, 27, 12).
Aa
White text reads best on this color (6.98:1).
About this color
#B01B0C is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.184 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.005 away. White text reads best on it, at 6.98:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.184) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 3.00:1 |
| White text | 6.98:1 |
Values
| HEX | #B01B0C |
| RGB | rgb(176, 27, 12) |
| HSL | hsl(5, 87%, 37%) |
| OKLCH | oklch(48.7% 0.184 30.3) |
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 #B01B0C | 6.98:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #B01B0C | 3.00:1 | AA large text | Lc 21.8 | Dividers and decoration only |
| #B01B0C text on white | 6.98:1 | AA | Lc 82.3 | Fine for body text |
| #B01B0C text on black | 3.00:1 | AA large text | Lc -19.6 | 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
#FBE4E0
oklch(93.6% 0.026 29.4)
-
Step 200
200
#F8CEC6
oklch(88.5% 0.049 30.7)
-
Step 300
300
#F5AB9E
oklch(80.9% 0.09 30.2)
-
Step 400
400
#EC7B69
oklch(70.7% 0.143 30.4)
-
Step 500
500
#E25340
oklch(63.1% 0.182 30.4)
-
Step 600
600
#CE2E1D
oklch(55.7% 0.198 30.3)
-
Step 700
700 (this color)
#B01B0C
oklch(48.7% 0.184 30.3)
-
Step 800
800
#901D11
oklch(42.7% 0.152 30.3)
-
Step 900
900
#742016
oklch(37.7% 0.119 30.2)
-
Step 950
950
#44140E
oklch(26.9% 0.076 29.9)
#B01B0C 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) | #4E4505 | 0.200 |
| Deuteranopia (no green cones) | #726500 | 0.179 |
| Tritanopia (no blue cones) | #C3001B | 0.040 |
| Achromatopsia (no color) | #595959 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B01B0C
#B01B0C
oklch(48.7% 0.184 30.3)
- #006C7A
#006C7A
oklch(48.7% 0.084 210.3)
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 #B01B0C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.005
- Firebrick #B22222 ΔE 0.016
- Rust Red #AA2704 ΔE 0.017
- Rusty Red #AF2F0D ΔE 0.024
- Brown #A52A2A ΔE 0.029
- Scarlet #BE0119 ΔE 0.031
- Burnt Red #9F2305 ΔE 0.035
- Brick #A03623 ΔE 0.041
Use #B01B0C 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.