#B23C24
Closest named color: Rusty Red (#AF2F0D). oklch(52.2% 0.158 33.3), rgb(178, 60, 36).
Aa
White text reads best on this color (5.89:1).
About this color
#B23C24 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.158 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.024 away. White text reads best on it, at 5.89:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.158) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.56:1 |
| White text | 5.89:1 |
Values
| HEX | #B23C24 |
| RGB | rgb(178, 60, 36) |
| HSL | hsl(10, 66%, 42%) |
| OKLCH | oklch(52.2% 0.158 33.3) |
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 #B23C24 | 5.89:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #B23C24 | 3.56:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #B23C24 text on white | 5.89:1 | AA | Lc 78.5 | Fine for body text |
| #B23C24 text on black | 3.56:1 | AA large text | Lc -23.3 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E0
oklch(93.6% 0.022 35.1)
-
Step 200
200
#F4D0C7
oklch(88.6% 0.043 34.3)
-
Step 300
300
#EEAFA1
oklch(80.9% 0.077 32.9)
-
Step 400
400
#E2836E
oklch(70.8% 0.122 33.4)
-
Step 500
500
#D75F46
oklch(63.1% 0.157 33.4)
-
Step 600
600
#C24127
oklch(55.5% 0.17 33.3)
-
Step 700
700 (this color)
#B23C24
oklch(52.2% 0.158 33.3)
-
Step 800
800
#882B18
oklch(42.7% 0.131 33.4)
-
Step 900
900
#6D281A
oklch(37.6% 0.102 33.2)
-
Step 950
950
#401910
oklch(27% 0.063 34.3)
#B23C24 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) | #5E5420 | 0.163 |
| Deuteranopia (no green cones) | #7B6E1F | 0.149 |
| Tritanopia (no blue cones) | #C41937 | 0.059 |
| Achromatopsia (no color) | #646464 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B23C24
#B23C24
oklch(52.2% 0.158 33.3)
- #007789
#007789
oklch(52.3% 0.091 212.9)
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 #B23C24, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.024
- Sinopia #BB3E03 ΔE 0.026
- Dull Red #BB3F3F ΔE 0.034
- Firebrick #B22222 ΔE 0.039
- Brick #A03623 ΔE 0.040
- Rust Red #AA2704 ΔE 0.041
- Russet #A13905 ΔE 0.041
- Rufous #AE2012 ΔE 0.042
Use #B23C24 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.