#C03C0C
Closest named color: Sinopia (#BB3E03). oklch(54.4% 0.176 37), rgb(192, 60, 12).
Aa
White text reads best on this color (5.39:1).
About this color
#C03C0C is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.176 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.011 away. White text reads best on it, at 5.39:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.176) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.89:1 |
| White text | 5.39:1 |
Values
| HEX | #C03C0C |
| RGB | rgb(192, 60, 12) |
| HSL | hsl(16, 88%, 40%) |
| OKLCH | oklch(54.4% 0.176 37) |
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 #C03C0C | 5.39:1 | AA | Lc -81.1 | Fine for body text |
| Black text on #C03C0C | 3.89:1 | AA large text | Lc 28.4 | Dividers and decoration only |
| #C03C0C text on white | 5.39:1 | AA | Lc 75.7 | Fine for body text |
| #C03C0C text on black | 3.89:1 | AA large text | Lc -26.0 | 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
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F4D0C5
oklch(88.5% 0.043 37.7)
-
Step 300
300
#EFAF9D
oklch(80.9% 0.08 36.3)
-
Step 400
400
#E38266
oklch(70.6% 0.127 36.9)
-
Step 500
500
#D95F3B
oklch(63.2% 0.162 37)
-
Step 600
600 (this color)
#C03C0C
oklch(54.4% 0.176 37)
-
Step 700
700
#A93001
oklch(49.1% 0.164 36.9)
-
Step 800
800
#892A09
oklch(42.7% 0.135 37.1)
-
Step 900
900
#6E2812
oklch(37.7% 0.105 37.4)
-
Step 950
950
#41180C
oklch(26.9% 0.067 37)
#C03C0C 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) | #645700 | 0.180 |
| Deuteranopia (no green cones) | #847500 | 0.162 |
| Tritanopia (no blue cones) | #D40434 | 0.071 |
| Achromatopsia (no color) | #6A6A6A | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C03C0C
#C03C0C
oklch(54.4% 0.176 37)
- #007D95
#007D95
oklch(54.4% 0.097 217.5)
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 #C03C0C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.011
- Brick Orange #C14A09 ΔE 0.026
- Burnt Orange #C04E01 ΔE 0.034
- Dull Red #BB3F3F ΔE 0.041
- Burnt Siena #B75203 ΔE 0.044
- Rusty Red #AF2F0D ΔE 0.045
- Cinnamon #AC4F06 ΔE 0.049
- Rust Orange #C45508 ΔE 0.050
Use #C03C0C 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.