#B23C2B
Closest named color: Rusty Red (#AF2F0D). oklch(52.3% 0.157 31), rgb(178, 60, 43).
Aa
White text reads best on this color (5.87:1).
About this color
#B23C2B is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.157 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.027 away. White text reads best on it, at 5.87:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.157) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.57:1 |
| White text | 5.87:1 |
Values
| HEX | #B23C2B |
| RGB | rgb(178, 60, 43) |
| HSL | hsl(8, 61%, 43%) |
| OKLCH | oklch(52.3% 0.157 31) |
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 #B23C2B | 5.87:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #B23C2B | 3.57:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #B23C2B text on white | 5.87:1 | AA | Lc 78.4 | Fine for body text |
| #B23C2B text on black | 3.57:1 | AA large text | Lc -23.4 | 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
#F8E5E1
oklch(93.6% 0.022 31.8)
-
Step 200
200
#F4D0C8
oklch(88.6% 0.042 32.6)
-
Step 300
300
#EDAFA3
oklch(80.9% 0.075 31.1)
-
Step 400
400
#E28271
oklch(70.7% 0.122 31)
-
Step 500
500
#D75F4C
oklch(63.2% 0.155 31)
-
Step 600
600
#C2412E
oklch(55.6% 0.168 31.2)
-
Step 700
700 (this color)
#B23C2B
oklch(52.3% 0.157 31)
-
Step 800
800
#882B1D
oklch(42.8% 0.13 31.3)
-
Step 900
900
#6D281E
oklch(37.6% 0.101 30.6)
-
Step 950
950
#401812
oklch(26.9% 0.064 30.5)
#B23C2B 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) | #5D5428 | 0.164 |
| Deuteranopia (no green cones) | #7B6E27 | 0.149 |
| Tritanopia (no blue cones) | #C41B39 | 0.055 |
| Achromatopsia (no color) | #646464 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B23C2B
#B23C2B
oklch(52.3% 0.157 31)
- #007787
#007787
oklch(52.2% 0.091 211)
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 #B23C2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.027
- Dull Red #BB3F3F ΔE 0.029
- Sinopia #BB3E03 ΔE 0.031
- Firebrick #B22222 ΔE 0.037
- Brick #A03623 ΔE 0.041
- Rust Red #AA2704 ΔE 0.043
- Rufous #AE2012 ΔE 0.043
- Dusty Red #B9484E ΔE 0.044
Use #B23C2B 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.