#C03F28
Closest named color: Sinopia (#BB3E03). oklch(55% 0.169 32.4), rgb(192, 63, 40).
Aa
White text reads best on this color (5.27:1).
About this color
#C03F28 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.169 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.023 away. White text reads best on it, at 5.27:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.169) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.98:1 |
| White text | 5.27:1 |
Values
| HEX | #C03F28 |
| RGB | rgb(192, 63, 40) |
| HSL | hsl(9, 66%, 45%) |
| OKLCH | oklch(55% 0.169 32.4) |
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 #C03F28 | 5.27:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #C03F28 | 3.98:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #C03F28 text on white | 5.27:1 | AA | Lc 75.1 | Fine for body text |
| #C03F28 text on black | 3.98:1 | AA large text | Lc -26.6 | 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
#F8E5E1
oklch(93.6% 0.022 31.8)
-
Step 200
200
#F4D0C8
oklch(88.6% 0.042 32.6)
-
Step 300
300
#EEAFA2
oklch(80.9% 0.077 31.9)
-
Step 400
400
#E2826F
oklch(70.6% 0.122 32.2)
-
Step 500
500
#D75F49
oklch(63.1% 0.156 32.2)
-
Step 600
600 (this color)
#C03F28
oklch(55% 0.169 32.4)
-
Step 700
700
#A7321D
oklch(49.1% 0.157 32.5)
-
Step 800
800
#882B1A
oklch(42.8% 0.13 32.6)
-
Step 900
900
#6D281C
oklch(37.6% 0.101 32)
-
Step 950
950
#401811
oklch(26.8% 0.064 31.7)
#C03F28 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) | #645A24 | 0.177 |
| Deuteranopia (no green cones) | #847623 | 0.160 |
| Tritanopia (no blue cones) | #D3163B | 0.061 |
| Achromatopsia (no color) | #6C6C6C | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C03F28
#C03F28
oklch(55% 0.169 32.4)
- #008092
#008092
oklch(55% 0.096 211.8)
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 #C03F28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.023
- Dull Red #BB3F3F ΔE 0.026
- Brick Orange #C14A09 ΔE 0.031
- Burnt Orange #C04E01 ΔE 0.040
- Dusty Red #B9484E ΔE 0.041
- Burnt Siena #B75203 ΔE 0.049
- Rusty Red #AF2F0D ΔE 0.049
- Rust Orange #C45508 ΔE 0.053
Use #C03F28 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.