#C03D3A
Closest named color: Dull Red (#BB3F3F). oklch(55% 0.168 25.7), rgb(192, 61, 58).
Aa
White text reads best on this color (5.28:1).
About this color
#C03D3A is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.168 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.011 away. White text reads best on it, at 5.28:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.168) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.96:1 |
| White text | 5.28:1 |
Values
| HEX | #C03D3A |
| RGB | rgb(192, 61, 58) |
| HSL | hsl(1, 54%, 49%) |
| OKLCH | oklch(55% 0.168 25.7) |
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 #C03D3A | 5.28:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #C03D3A | 3.96:1 | AA large text | Lc 28.8 | Dividers and decoration only |
| #C03D3A text on white | 5.28:1 | AA | Lc 75.2 | Fine for body text |
| #C03D3A text on black | 3.96:1 | AA large text | Lc -26.5 | 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
#F8E5E2
oklch(93.6% 0.021 28.3)
-
Step 200
200
#F4CFCB
oklch(88.5% 0.042 25.3)
-
Step 300
300
#EEAEA8
oklch(80.9% 0.076 24.9)
-
Step 400
400
#E28179
oklch(70.7% 0.121 25.6)
-
Step 500
500
#D75D57
oklch(63.1% 0.155 25.3)
-
Step 600
600 (this color)
#C03D3A
oklch(55% 0.168 25.7)
-
Step 700
700
#A7302E
oklch(49.1% 0.156 25.8)
-
Step 800
800
#882927
oklch(42.7% 0.13 25.6)
-
Step 900
900
#6D2724
oklch(37.6% 0.101 25.6)
-
Step 950
950
#401815
oklch(26.9% 0.063 26.5)
#C03D3A 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) | #615A38 | 0.181 |
| Deuteranopia (no green cones) | #827636 | 0.166 |
| Tritanopia (no blue cones) | #D3173E | 0.051 |
| Achromatopsia (no color) | #6C6C6C | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C03D3A
#C03D3A
oklch(55% 0.168 25.7)
- #00818C
#00818C
oklch(55.1% 0.094 205.3)
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 #C03D3A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.011
- Dusty Red #B9484E ΔE 0.027
- Sinopia #BB3E03 ΔE 0.041
- Dark Rose #B5485D ΔE 0.047
- Brick Orange #C14A09 ΔE 0.050
- Faded Red #D3494E ΔE 0.050
- Cherry #CF0234 ΔE 0.052
- Dark Coral #CF524E ΔE 0.053
Use #C03D3A 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.