#B23A08
Closest named color: Sinopia (#BB3E03). oklch(51.8% 0.164 38.3), rgb(178, 58, 8).
Aa
White text reads best on this color (5.99:1).
About this color
#B23A08 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.164 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.021 away. White text reads best on it, at 5.99:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.164) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.50:1 |
| White text | 5.99:1 |
Values
| HEX | #B23A08 |
| RGB | rgb(178, 58, 8) |
| HSL | hsl(18, 91%, 36%) |
| OKLCH | oklch(51.8% 0.164 38.3) |
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 #B23A08 | 5.99:1 | AA | Lc -84.1 | Fine for body text |
| Black text on #B23A08 | 3.50:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #B23A08 text on white | 5.99:1 | AA | Lc 78.9 | Fine for body text |
| #B23A08 text on black | 3.50:1 | AA large text | Lc -22.9 | 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
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F8E5DF
oklch(93.5% 0.022 38.3)
-
Step 200
200
#F4D0C4
oklch(88.5% 0.044 39.3)
-
Step 300
300
#EEAF9B
oklch(80.8% 0.079 38.3)
-
Step 400
400
#E38364
oklch(70.7% 0.127 38.6)
-
Step 500
500
#D85F37
oklch(63% 0.162 38.4)
-
Step 600
600
#C44109
oklch(55.7% 0.176 38.5)
-
Step 700
700 (this color)
#B23A08
oklch(51.8% 0.164 38.3)
-
Step 800
800
#892A04
oklch(42.7% 0.136 38.1)
-
Step 900
900
#6E2810
oklch(37.6% 0.106 38.3)
-
Step 950
950
#41180B
oklch(26.9% 0.068 38)
#B23A08 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) | #5E5200 | 0.165 |
| Deuteranopia (no green cones) | #7B6D00 | 0.150 |
| Tritanopia (no blue cones) | #C50F32 | 0.070 |
| Achromatopsia (no color) | #636363 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B23A08
#B23A08
oklch(51.8% 0.164 38.3)
- #00758C
#00758C
oklch(51.9% 0.093 217.8)
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 #B23A08, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.021
- Rusty Red #AF2F0D ΔE 0.021
- Russet #A13905 ΔE 0.035
- Rust Red #AA2704 ΔE 0.037
- Burnt Umber #A0450E ΔE 0.037
- Cinnamon #AC4F06 ΔE 0.042
- Brick #A03623 ΔE 0.042
- Rufous #AE2012 ΔE 0.042
Use #B23A08 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.