#C03619
Closest named color: Sinopia (#BB3E03). oklch(53.9% 0.179 33.3), rgb(192, 54, 25).
Aa
White text reads best on this color (5.55:1).
About this color
#C03619 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.179 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.020 away. White text reads best on it, at 5.55:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.179) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.78:1 |
| White text | 5.55:1 |
Values
| HEX | #C03619 |
| RGB | rgb(192, 54, 25) |
| HSL | hsl(10, 77%, 43%) |
| OKLCH | oklch(53.9% 0.179 33.3) |
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 #C03619 | 5.55:1 | AA | Lc -81.8 | Fine for body text |
| Black text on #C03619 | 3.78:1 | AA large text | Lc 27.6 | Dividers and decoration only |
| #C03619 text on white | 5.55:1 | AA | Lc 76.4 | Fine for body text |
| #C03619 text on black | 3.78:1 | AA large text | Lc -25.3 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
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
#F0AE9F
oklch(80.9% 0.081 33.2)
-
Step 400
400
#E5806A
oklch(70.6% 0.129 33.3)
-
Step 500
500
#DB5C42
oklch(63.2% 0.165 33.3)
-
Step 600
600 (this color)
#C03619
oklch(53.9% 0.179 33.3)
-
Step 700
700
#AB2D11
oklch(49.2% 0.167 33.5)
-
Step 800
800
#8B2713
oklch(42.8% 0.139 33.1)
-
Step 900
900
#6F2617
oklch(37.6% 0.107 33.4)
-
Step 950
950
#42170F
oklch(27% 0.069 32.4)
#C03619 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) | #605513 | 0.188 |
| Deuteranopia (no green cones) | #82730F | 0.169 |
| Tritanopia (no blue cones) | #D40031 | 0.060 |
| Achromatopsia (no color) | #686868 | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C03619
#C03619
oklch(53.9% 0.179 33.3)
- #007C8F
#007C8F
oklch(53.9% 0.094 213.2)
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 #C03619, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.020
- Dull Red #BB3F3F ΔE 0.034
- Brick Orange #C14A09 ΔE 0.038
- Rusty Red #AF2F0D ΔE 0.039
- Firebrick #B22222 ΔE 0.047
- Burnt Orange #C04E01 ΔE 0.047
- Scarlet #BE0119 ΔE 0.049
- Dusty Red #B9484E ΔE 0.052
Use #C03619 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.