#B23E0D
Closest named color: Sinopia (#BB3E03). oklch(52.3% 0.16 39.2), rgb(178, 62, 13).
Aa
White text reads best on this color (5.85:1).
About this color
#B23E0D is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.160 and its hue 39°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.018 away. White text reads best on it, at 5.85:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.160) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.58:1 |
| White text | 5.85:1 |
Values
| HEX | #B23E0D |
| RGB | rgb(178, 62, 13) |
| HSL | hsl(18, 86%, 37%) |
| OKLCH | oklch(52.3% 0.16 39.2) |
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 #B23E0D | 5.85:1 | AA | Lc -83.5 | Fine for body text |
| Black text on #B23E0D | 3.58:1 | AA large text | Lc 25.8 | Dividers and decoration only |
| #B23E0D text on white | 5.85:1 | AA | Lc 78.3 | Fine for body text |
| #B23E0D text on black | 3.58:1 | AA large text | Lc -23.5 | 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
#F4D0C5
oklch(88.5% 0.043 37.7)
-
Step 300
300
#EDB09C
oklch(80.9% 0.077 38.9)
-
Step 400
400
#E28465
oklch(70.8% 0.124 39)
-
Step 500
500
#D76138
oklch(63.2% 0.159 39.1)
-
Step 600
600
#C2430C
oklch(55.6% 0.172 39.1)
-
Step 700
700 (this color)
#B23E0D
oklch(52.3% 0.16 39.2)
-
Step 800
800
#882C05
oklch(42.7% 0.133 39)
-
Step 900
900
#6D2911
oklch(37.6% 0.103 38.8)
-
Step 950
950
#40190C
oklch(26.9% 0.065 38.7)
#B23E0D 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) | #605401 | 0.161 |
| Deuteranopia (no green cones) | #7D6E02 | 0.144 |
| Tritanopia (no blue cones) | #C41A36 | 0.070 |
| Achromatopsia (no color) | #656565 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B23E0D
#B23E0D
oklch(52.3% 0.16 39.2)
- #00768F
#00768F
oklch(52.3% 0.095 219.4)
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 #B23E0D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.018
- Rusty Red #AF2F0D ΔE 0.028
- Cinnamon #AC4F06 ΔE 0.035
- Burnt Umber #A0450E ΔE 0.036
- Russet #A13905 ΔE 0.038
- Brick Orange #C14A09 ΔE 0.041
- Rust Red #AA2704 ΔE 0.043
- Burnt Siena #B75203 ΔE 0.044
Use #B23E0D 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.