#B01B24
Closest named color: Firebrick (#B22222). oklch(48.9% 0.182 25), rgb(176, 27, 36).
Aa
White text reads best on this color (6.93:1).
About this color
#B01B24 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.182 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.010 away. White text reads best on it, at 6.93:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.182) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.02:1 |
| White text | 6.93:1 |
Values
| HEX | #B01B24 |
| RGB | rgb(176, 27, 36) |
| HSL | hsl(356, 73%, 40%) |
| OKLCH | oklch(48.9% 0.182 25) |
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 #B01B24 | 6.93:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #B01B24 | 3.02:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #B01B24 text on white | 6.93:1 | AA | Lc 82.2 | Fine for body text |
| #B01B24 text on black | 3.02:1 | AA large text | Lc -19.7 | 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
#FBE4E1
oklch(93.7% 0.026 26.5)
-
Step 200
200
#F8CDC9
oklch(88.4% 0.049 24.3)
-
Step 300
300
#F4ABA4
oklch(80.9% 0.087 25.3)
-
Step 400
400
#EB7A73
oklch(70.6% 0.141 24.9)
-
Step 500
500
#E2524F
oklch(63.2% 0.18 24.9)
-
Step 600
600
#CD2D32
oklch(55.6% 0.196 25)
-
Step 700
700 (this color)
#B01B24
oklch(48.9% 0.182 25)
-
Step 800
800
#901C20
oklch(42.8% 0.151 24.9)
-
Step 900
900
#73201F
oklch(37.7% 0.117 25.3)
-
Step 950
950
#441413
oklch(27% 0.075 24.6)
#B01B24 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) | #4D4522 | 0.199 |
| Deuteranopia (no green cones) | #71651D | 0.181 |
| Tritanopia (no blue cones) | #C20021 | 0.036 |
| Achromatopsia (no color) | #5A5A5A | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B01B24
#B01B24
oklch(48.9% 0.182 25)
- #006D76
#006D76
oklch(48.8% 0.083 204.8)
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 #B01B24, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.010
- Rufous #AE2012 ΔE 0.017
- Brown #A52A2A ΔE 0.024
- Scarlet #BE0119 ΔE 0.028
- Rust Red #AA2704 ΔE 0.030
- Rouge #AB1239 ΔE 0.032
- Rusty Red #AF2F0D ΔE 0.034
- Lipstick Red #C0022F ΔE 0.035
Use #B01B24 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.