#B01023
Closest named color: Firebrick (#B22222). oklch(48.3% 0.188 23.9), rgb(176, 16, 35).
Aa
White text reads best on this color (7.13:1).
About this color
#B01023 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.188 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.018 away. White text reads best on it, at 7.13:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.188) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 2.94:1 |
| White text | 7.13:1 |
Values
| HEX | #B01023 |
| RGB | rgb(176, 16, 35) |
| HSL | hsl(353, 83%, 38%) |
| OKLCH | oklch(48.3% 0.188 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 #B01023 | 7.13:1 | AAA | Lc -87.7 | Fine for body text |
| Black text on #B01023 | 2.94:1 | Fails | Lc 21.4 | Dividers and decoration only |
| #B01023 text on white | 7.13:1 | AAA | Lc 82.6 | Fine for body text |
| #B01023 text on black | 2.94:1 | Fails | Lc -19.3 | 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
#FBE4E1
oklch(93.7% 0.026 26.5)
-
Step 200
200
#F9CDC9
oklch(88.5% 0.05 24.2)
-
Step 300
300
#F6AAA4
oklch(80.9% 0.091 24.3)
-
Step 400
400
#ED7873
oklch(70.6% 0.145 24)
-
Step 500
500
#E44E4F
oklch(63.1% 0.186 23.8)
-
Step 600
600
#CF2733
oklch(55.6% 0.202 23.8)
-
Step 700
700 (this color)
#B01023
oklch(48.3% 0.188 23.9)
-
Step 800
800
#911820
oklch(42.7% 0.155 24.1)
-
Step 900
900
#751D20
oklch(37.7% 0.122 23.5)
-
Step 950
950
#451313
oklch(27% 0.077 23.8)
#B01023 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) | #4A4322 | 0.207 |
| Deuteranopia (no green cones) | #6F631C | 0.187 |
| Tritanopia (no blue cones) | #C2001B | 0.037 |
| Achromatopsia (no color) | #585858 | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B01023
#B01023
oklch(48.3% 0.188 23.9)
- #006C74
#006C74
oklch(48.4% 0.083 203.8)
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 #B01023, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.018
- Rufous #AE2012 ΔE 0.022
- Rouge #AB1239 ΔE 0.028
- Brown #A52A2A ΔE 0.028
- Scarlet #BE0119 ΔE 0.029
- Rust Red #AA2704 ΔE 0.035
- Lipstick Red #C0022F ΔE 0.035
- Rose Red #BE013C ΔE 0.041
Use #B01023 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.