#B0011F
Closest named color: Firebrick (#B22222). oklch(47.8% 0.193 23.9), rgb(176, 1, 31).
Aa
White text reads best on this color (7.31:1).
About this color
#B0011F is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.193 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.025 away. White text reads best on it, at 7.31:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.193) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 2.87:1 |
| White text | 7.31:1 |
Values
| HEX | #B0011F |
| RGB | rgb(176, 1, 31) |
| HSL | hsl(350, 99%, 35%) |
| OKLCH | oklch(47.8% 0.193 23.9) |
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 #B0011F | 7.31:1 | AAA | Lc -87.8 | Fine for body text |
| Black text on #B0011F | 2.87:1 | Fails | Lc 21.2 | Dividers and decoration only |
| #B0011F text on white | 7.31:1 | AAA | Lc 82.8 | Fine for body text |
| #B0011F text on black | 2.87:1 | Fails | Lc -19.1 | 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
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FCE3E1
oklch(93.6% 0.028 23.2)
-
Step 200
200
#FACDC9
oklch(88.6% 0.051 24.1)
-
Step 300
300
#F7A9A3
oklch(80.9% 0.093 24.2)
-
Step 400
400
#EF7772
oklch(70.7% 0.149 24)
-
Step 500
500
#E64C4D
oklch(63.1% 0.191 24.1)
-
Step 600
600
#D12230
oklch(55.6% 0.207 24.1)
-
Step 700
700 (this color)
#B0011F
oklch(47.8% 0.193 23.9)
-
Step 800
800
#93141F
oklch(42.8% 0.16 23.9)
-
Step 900
900
#761B1E
oklch(37.7% 0.125 24)
-
Step 950
950
#451212
oklch(26.9% 0.079 24.1)
#B0011F 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) | #47401E | 0.214 |
| Deuteranopia (no green cones) | #6E6216 | 0.193 |
| Tritanopia (no blue cones) | #C30013 | 0.041 |
| Achromatopsia (no color) | #565656 | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B0011F
#B0011F
oklch(47.8% 0.193 23.9)
- #006A72
#006A72
oklch(47.8% 0.081 203.9)
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 #B0011F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.025
- Rufous #AE2012 ΔE 0.026
- Rouge #AB1239 ΔE 0.029
- Scarlet #BE0119 ΔE 0.030
- Brown #A52A2A ΔE 0.034
- Lipstick Red #C0022F ΔE 0.038
- Rust Red #AA2704 ΔE 0.038
- Carmine #9D0216 ΔE 0.042
Use #B0011F 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.