#B01E23
Closest named color: Firebrick (#B22222). oklch(49% 0.18 25.8), rgb(176, 30, 35).
Aa
White text reads best on this color (6.87:1).
About this color
#B01E23 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.180 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.007 away. White text reads best on it, at 6.87:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.180) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.05:1 |
| White text | 6.87:1 |
Values
| HEX | #B01E23 |
| RGB | rgb(176, 30, 35) |
| HSL | hsl(358, 71%, 40%) |
| OKLCH | oklch(49% 0.18 25.8) |
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 #B01E23 | 6.87:1 | AA | Lc -87.1 | Fine for body text |
| Black text on #B01E23 | 3.05:1 | AA large text | Lc 22.0 | Dividers and decoration only |
| #B01E23 text on white | 6.87:1 | AA | Lc 82.0 | Fine for body text |
| #B01E23 text on black | 3.05:1 | AA large text | Lc -19.9 | 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
#F8CEC9
oklch(88.6% 0.048 26)
-
Step 300
300
#F4ABA3
oklch(80.9% 0.087 26.1)
-
Step 400
400
#EB7B72
oklch(70.7% 0.14 26)
-
Step 500
500
#E1534D
oklch(63.1% 0.178 26)
-
Step 600
600
#CC2F30
oklch(55.6% 0.193 25.9)
-
Step 700
700 (this color)
#B01E23
oklch(49% 0.18 25.8)
-
Step 800
800
#8F1D1F
oklch(42.7% 0.149 25.6)
-
Step 900
900
#73201E
oklch(37.7% 0.117 25.9)
-
Step 950
950
#441412
oklch(27% 0.075 25.8)
#B01E23 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) | #4E4621 | 0.197 |
| Deuteranopia (no green cones) | #72651C | 0.178 |
| Tritanopia (no blue cones) | #C20022 | 0.036 |
| Achromatopsia (no color) | #5A5A5A | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B01E23
#B01E23
oklch(49% 0.18 25.8)
- #006E78
#006E78
oklch(49.1% 0.084 205.8)
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 #B01E23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.007
- Rufous #AE2012 ΔE 0.015
- Brown #A52A2A ΔE 0.023
- Rust Red #AA2704 ΔE 0.027
- Scarlet #BE0119 ΔE 0.028
- Rusty Red #AF2F0D ΔE 0.031
- Rouge #AB1239 ΔE 0.035
- Lipstick Red #C0022F ΔE 0.037
Use #B01E23 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.