#C03748
Closest named color: Dull Red (#BB3F3F). oklch(54.6% 0.173 18.2), rgb(192, 55, 72).
Aa
White text reads best on this color (5.41:1).
About this color
#C03748 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.173 and its hue 18°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.021 away. White text reads best on it, at 5.41:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.173) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.88:1 |
| White text | 5.41:1 |
Values
| HEX | #C03748 |
| RGB | rgb(192, 55, 72) |
| HSL | hsl(353, 55%, 48%) |
| OKLCH | oklch(54.6% 0.173 18.2) |
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 #C03748 | 5.41:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #C03748 | 3.88:1 | AA large text | Lc 28.3 | Dividers and decoration only |
| #C03748 text on white | 5.41:1 | AA | Lc 75.8 | Fine for body text |
| #C03748 text on black | 3.88:1 | AA large text | Lc -25.9 | 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
#FCF3F3
oklch(97.1% 0.01 17.3)
-
Step 100
100
#F9E4E4
oklch(93.6% 0.023 17.6)
-
Step 200
200
#F5CECE
oklch(88.5% 0.044 18)
-
Step 300
300
#EFADAD
oklch(81% 0.078 18.9)
-
Step 400
400
#E37F83
oklch(70.7% 0.123 18.2)
-
Step 500
500
#D85A64
oklch(63.1% 0.158 18.1)
-
Step 600
600 (this color)
#C03748
oklch(54.6% 0.173 18.2)
-
Step 700
700
#A82B3C
oklch(49% 0.16 18.1)
-
Step 800
800
#892632
oklch(42.7% 0.133 18.1)
-
Step 900
900
#6E252C
oklch(37.7% 0.104 18)
-
Step 950
950
#41171A
oklch(27.1% 0.065 18.2)
#C03748 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) | #5C5848 | 0.190 |
| Deuteranopia (no green cones) | #7F7544 | 0.175 |
| Tritanopia (no blue cones) | #D20C3E | 0.044 |
| Achromatopsia (no color) | #6A6A6A | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C03748
#C03748
oklch(54.6% 0.173 18.2)
- #008084
#008084
oklch(54.5% 0.093 198.6)
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 #C03748, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.021
- Dusty Red #B9484E ΔE 0.028
- Dark Rose #B5485D ΔE 0.037
- Cherry #CF0234 ΔE 0.045
- Ruby #CA0147 ΔE 0.045
- Deep Rose #C74767 ΔE 0.047
- Lipstick Red #C0022F ΔE 0.048
- Rose Red #BE013C ΔE 0.048
Use #C03748 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.