#C03D28
Closest named color: Sinopia (#BB3E03). oklch(54.7% 0.171 31.8), rgb(192, 61, 40).
Aa
White text reads best on this color (5.33:1).
About this color
#C03D28 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.171 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.024 away. White text reads best on it, at 5.33:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.171) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #C03D28 |
| RGB | rgb(192, 61, 40) |
| HSL | hsl(8, 66%, 45%) |
| OKLCH | oklch(54.7% 0.171 31.8) |
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 #C03D28 | 5.33:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #C03D28 | 3.93:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #C03D28 text on white | 5.33:1 | AA | Lc 75.4 | Fine for body text |
| #C03D28 text on black | 3.93:1 | AA large text | Lc -26.3 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E1
oklch(93.6% 0.022 31.8)
-
Step 200
200
#F4CFC8
oklch(88.4% 0.043 30.5)
-
Step 300
300
#EEAFA2
oklch(80.9% 0.077 31.9)
-
Step 400
400
#E3826F
oklch(70.8% 0.124 32.1)
-
Step 500
500
#D85E49
oklch(63.1% 0.158 31.7)
-
Step 600
600 (this color)
#C03D28
oklch(54.7% 0.171 31.8)
-
Step 700
700
#A8301D
oklch(49.1% 0.159 31.8)
-
Step 800
800
#882A1B
oklch(42.7% 0.131 31.7)
-
Step 900
900
#6E281C
oklch(37.8% 0.102 31.9)
-
Step 950
950
#411811
oklch(27% 0.066 31.5)
#C03D28 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) | #635924 | 0.179 |
| Deuteranopia (no green cones) | #847622 | 0.163 |
| Tritanopia (no blue cones) | #D31039 | 0.060 |
| Achromatopsia (no color) | #6B6B6B | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C03D28
#C03D28
oklch(54.7% 0.171 31.8)
- #007F91
#007F91
oklch(54.7% 0.095 211.9)
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 #C03D28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.024
- Dull Red #BB3F3F ΔE 0.025
- Brick Orange #C14A09 ΔE 0.034
- Dusty Red #B9484E ΔE 0.041
- Burnt Orange #C04E01 ΔE 0.043
- Rusty Red #AF2F0D ΔE 0.047
- Burnt Siena #B75203 ΔE 0.052
- Firebrick #B22222 ΔE 0.054
Use #C03D28 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.