#C0381B
Closest named color: Sinopia (#BB3E03). oklch(54.1% 0.177 33.5), rgb(192, 56, 27).
Aa
White text reads best on this color (5.49:1).
About this color
#C0381B is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.177 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.019 away. White text reads best on it, at 5.49:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.82:1 |
| White text | 5.49:1 |
Values
| HEX | #C0381B |
| RGB | rgb(192, 56, 27) |
| HSL | hsl(11, 75%, 43%) |
| OKLCH | oklch(54.1% 0.177 33.5) |
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 #C0381B | 5.49:1 | AA | Lc -81.5 | Fine for body text |
| Black text on #C0381B | 3.82:1 | AA large text | Lc 27.9 | Dividers and decoration only |
| #C0381B text on white | 5.49:1 | AA | Lc 76.2 | Fine for body text |
| #C0381B text on black | 3.82:1 | AA large text | Lc -25.6 | 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 600.
-
Step 50
50
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F9E5E0
oklch(93.7% 0.023 34.3)
-
Step 200
200
#F5CFC6
oklch(88.4% 0.045 33.5)
-
Step 300
300
#EFAE9F
oklch(80.8% 0.08 33.4)
-
Step 400
400
#E5816B
oklch(70.8% 0.128 33.4)
-
Step 500
500
#DA5D42
oklch(63.2% 0.163 33.8)
-
Step 600
600 (this color)
#C0381B
oklch(54.1% 0.177 33.5)
-
Step 700
700
#AA2E13
oklch(49.1% 0.165 33.5)
-
Step 800
800
#8A2813
oklch(42.7% 0.137 33.6)
-
Step 900
900
#6F2717
oklch(37.8% 0.106 34.1)
-
Step 950
950
#41180F
oklch(27% 0.066 33.9)
#C0381B 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) | #615615 | 0.185 |
| Deuteranopia (no green cones) | #837412 | 0.168 |
| Tritanopia (no blue cones) | #D40033 | 0.062 |
| Achromatopsia (no color) | #696969 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C0381B
#C0381B
oklch(54.1% 0.177 33.5)
- #007D90
#007D90
oklch(54.2% 0.095 213.1)
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 #C0381B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.019
- Dull Red #BB3F3F ΔE 0.033
- Brick Orange #C14A09 ΔE 0.036
- Rusty Red #AF2F0D ΔE 0.041
- Burnt Orange #C04E01 ΔE 0.045
- Firebrick #B22222 ΔE 0.049
- Dusty Red #B9484E ΔE 0.051
- Scarlet #BE0119 ΔE 0.052
Use #C0381B 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.