#B13D10
Closest named color: Sinopia (#BB3E03). oklch(52% 0.16 38.5), rgb(177, 61, 16).
Aa
White text reads best on this color (5.92:1).
About this color
#B13D10 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.160 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 5.92:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.160) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.54:1 |
| White text | 5.92:1 |
Values
| HEX | #B13D10 |
| RGB | rgb(177, 61, 16) |
| HSL | hsl(17, 83%, 38%) |
| OKLCH | oklch(52% 0.16 38.5) |
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 #B13D10 | 5.92:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #B13D10 | 3.54:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #B13D10 text on white | 5.92:1 | AA | Lc 78.6 | Fine for body text |
| #B13D10 text on black | 3.54:1 | AA large text | Lc -23.2 | 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
#E28466
oklch(70.8% 0.124 38.4)
-
Step 500
500
#D7613A
oklch(63.2% 0.158 38.5)
-
Step 600
600
#C24311
oklch(55.6% 0.172 38.5)
-
Step 700
700 (this color)
#B13D10
oklch(52% 0.16 38.5)
-
Step 800
800
#882C08
oklch(42.8% 0.133 38.4)
-
Step 900
900
#6D2912
oklch(37.6% 0.103 38.4)
-
Step 950
950
#40190C
oklch(26.9% 0.065 38.7)
#B13D10 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) | #5F5305 | 0.161 |
| Deuteranopia (no green cones) | #7C6E06 | 0.146 |
| Tritanopia (no blue cones) | #C31935 | 0.068 |
| Achromatopsia (no color) | #646464 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B13D10
#B13D10
oklch(52% 0.16 38.5)
- #00758D
#00758D
oklch(52% 0.094 218.7)
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 #B13D10, 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 0.025
- Burnt Umber #A0450E ΔE 0.035
- Russet #A13905 ΔE 0.035
- Cinnamon #AC4F06 ΔE 0.038
- Rust Red #AA2704 ΔE 0.040
- Brick #A03623 ΔE 0.042
- Brick Orange #C14A09 ΔE 0.044
Use #B13D10 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.