#C03A39
Closest named color: Dull Red (#BB3F3F). oklch(54.6% 0.171 25.2), rgb(192, 58, 57).
Aa
White text reads best on this color (5.37:1).
About this color
#C03A39 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.171 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.012 away. White text reads best on it, at 5.37:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.171) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.90:1 |
| White text | 5.37:1 |
Values
| HEX | #C03A39 |
| RGB | rgb(192, 58, 57) |
| HSL | hsl(0, 54%, 49%) |
| OKLCH | oklch(54.6% 0.171 25.2) |
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 #C03A39 | 5.37:1 | AA | Lc -81.0 | Fine for body text |
| Black text on #C03A39 | 3.90:1 | AA large text | Lc 28.4 | Dividers and decoration only |
| #C03A39 text on white | 5.37:1 | AA | Lc 75.7 | Fine for body text |
| #C03A39 text on black | 3.90:1 | AA large text | Lc -26.1 | 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
#F9E5E2
oklch(93.7% 0.022 27.8)
-
Step 200
200
#F4CFCB
oklch(88.5% 0.042 25.3)
-
Step 300
300
#EEAEA7
oklch(80.9% 0.076 25.9)
-
Step 400
400
#E38079
oklch(70.6% 0.123 24.9)
-
Step 500
500
#D85C57
oklch(63.1% 0.157 24.9)
-
Step 600
600 (this color)
#C03A39
oklch(54.6% 0.171 25.2)
-
Step 700
700
#A82E2E
oklch(49% 0.159 25.2)
-
Step 800
800
#892827
oklch(42.8% 0.132 25.2)
-
Step 900
900
#6E2624
oklch(37.6% 0.103 24.9)
-
Step 950
950
#411815
oklch(27.1% 0.065 26.5)
#C03A39 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) | #605838 | 0.183 |
| Deuteranopia (no green cones) | #817535 | 0.169 |
| Tritanopia (no blue cones) | #D30D3B | 0.050 |
| Achromatopsia (no color) | #6A6A6A | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C03A39
#C03A39
oklch(54.6% 0.171 25.2)
- #00808A
#00808A
oklch(54.7% 0.093 204.4)
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 #C03A39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.012
- Dusty Red #B9484E ΔE 0.030
- Sinopia #BB3E03 ΔE 0.042
- Dark Rose #B5485D ΔE 0.048
- Cherry #CF0234 ΔE 0.049
- Firebrick #B22222 ΔE 0.050
- Lipstick Red #C0022F ΔE 0.051
- Faded Red #D3494E ΔE 0.052
Use #C03A39 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.