#C03401
Closest named color: Sinopia (#BB3E03). oklch(53.6% 0.183 35.9), rgb(192, 52, 1).
Aa
White text reads best on this color (5.62:1).
About this color
#C03401 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.183 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.017 away. White text reads best on it, at 5.62:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.183) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.73:1 |
| White text | 5.62:1 |
Values
| HEX | #C03401 |
| RGB | rgb(192, 52, 1) |
| HSL | hsl(16, 99%, 38%) |
| OKLCH | oklch(53.6% 0.183 35.9) |
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 #C03401 | 5.62:1 | AA | Lc -82.0 | Fine for body text |
| Black text on #C03401 | 3.73:1 | AA large text | Lc 27.4 | Dividers and decoration only |
| #C03401 text on white | 5.62:1 | AA | Lc 76.7 | Fine for body text |
| #C03401 text on black | 3.73:1 | AA large text | Lc -25.0 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F6CFC5
oklch(88.5% 0.046 34.7)
-
Step 300
300
#F0AE9C
oklch(80.8% 0.082 35.8)
-
Step 400
400
#E68065
oklch(70.6% 0.132 35.8)
-
Step 500
500
#DC5B39
oklch(63.1% 0.169 35.7)
-
Step 600
600 (this color)
#C03401
oklch(53.6% 0.183 35.9)
-
Step 700
700
#AB2D00
oklch(49.1% 0.169 35.9)
-
Step 800
800
#8B2706
oklch(42.7% 0.14 36.2)
-
Step 900
900
#702611
oklch(37.7% 0.11 36.2)
-
Step 950
950
#42170C
oklch(27% 0.07 35.4)
#C03401 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) | #605300 | 0.188 |
| Deuteranopia (no green cones) | #827300 | 0.170 |
| Tritanopia (no blue cones) | #D4002D | 0.062 |
| Achromatopsia (no color) | #676767 | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C03401
#C03401
oklch(53.6% 0.183 35.9)
- #007B90
#007B90
oklch(53.7% 0.095 215.1)
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 #C03401, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.017
- Brick Orange #C14A09 ΔE 0.038
- Rusty Red #AF2F0D ΔE 0.038
- Dull Red #BB3F3F ΔE 0.043
- Burnt Orange #C04E01 ΔE 0.046
- Firebrick #B22222 ΔE 0.049
- Scarlet #BE0119 ΔE 0.050
- Rufous #AE2012 ΔE 0.053
Use #C03401 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.