#C03643
Closest named color: Dull Red (#BB3F3F). oklch(54.4% 0.174 20.1), rgb(192, 54, 67).
Aa
White text reads best on this color (5.45:1).
About this color
#C03643 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.174 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.018 away. White text reads best on it, at 5.45:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.174) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.85:1 |
| White text | 5.45:1 |
Values
| HEX | #C03643 |
| RGB | rgb(192, 54, 67) |
| HSL | hsl(354, 56%, 48%) |
| OKLCH | oklch(54.4% 0.174 20.1) |
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 #C03643 | 5.45:1 | AA | Lc -81.4 | Fine for body text |
| Black text on #C03643 | 3.85:1 | AA large text | Lc 28.1 | Dividers and decoration only |
| #C03643 text on white | 5.45:1 | AA | Lc 76.0 | Fine for body text |
| #C03643 text on black | 3.85:1 | AA large text | Lc -25.7 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F9E4E4
oklch(93.6% 0.023 17.6)
-
Step 200
200
#F5CECD
oklch(88.4% 0.044 19.8)
-
Step 300
300
#EFADAC
oklch(80.9% 0.078 19.9)
-
Step 400
400
#E47F80
oklch(70.8% 0.125 20.1)
-
Step 500
500
#D95A60
oklch(63.1% 0.16 20.1)
-
Step 600
600 (this color)
#C03643
oklch(54.4% 0.174 20.1)
-
Step 700
700
#A92B38
oklch(49.1% 0.162 20.1)
-
Step 800
800
#89262F
oklch(42.7% 0.133 19.9)
-
Step 900
900
#6F2529
oklch(37.8% 0.105 20.5)
-
Step 950
950
#411718
oklch(27% 0.066 21.1)
#C03643 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) | #5C5742 | 0.191 |
| Deuteranopia (no green cones) | #7F743F | 0.174 |
| Tritanopia (no blue cones) | #D3043C | 0.046 |
| Achromatopsia (no color) | #696969 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C03643
#C03643
oklch(54.4% 0.174 20.1)
- #008085
#008085
oklch(54.5% 0.093 199.6)
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 #C03643, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.018
- Dusty Red #B9484E ΔE 0.030
- Dark Rose #B5485D ΔE 0.041
- Cherry #CF0234 ΔE 0.043
- Lipstick Red #C0022F ΔE 0.045
- Ruby #CA0147 ΔE 0.046
- Rose Red #BE013C ΔE 0.047
- Lipstick #D5174E ΔE 0.050
Use #C03643 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.