#D42D37
Closest named color: Crimson (#DC143C). oklch(56.9% 0.202 23.8), rgb(212, 45, 55).
Aa
White text reads best on this color (4.96:1).
About this color
#D42D37 is a medium-dark, vivid red. In OKLCH its lightness is 57%, its chroma 0.202 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Crimson (#DC143C), ΔE 0.025 away. White text reads best on it, at 4.96:1.
| Hue family | Reds |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.202) |
| Temperature | warm |
| Nearest name | Crimson (#DC143C) |
| Black text | 4.22:1 |
| White text | 4.96:1 |
Values
| HEX | #D42D37 |
| RGB | rgb(212, 45, 55) |
| HSL | hsl(356, 66%, 50%) |
| OKLCH | oklch(56.9% 0.202 23.8) |
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 #D42D37 | 4.96:1 | AA | Lc -78.2 | Fine for body text |
| Black text on #D42D37 | 4.22:1 | AA large text | Lc 31.4 | Non-text elements, placeholder text |
| #D42D37 text on white | 4.96:1 | AA | Lc 72.7 | Content text, not long reading |
| #D42D37 text on black | 4.22:1 | AA large text | Lc -29.0 | 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
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FBE4E1
oklch(93.7% 0.026 26.5)
-
Step 200
200
#F9CDC9
oklch(88.5% 0.05 24.2)
-
Step 300
300
#F6AAA4
oklch(80.9% 0.091 24.3)
-
Step 400
400
#ED7874
oklch(70.6% 0.145 23.5)
-
Step 500
500
#E44E4F
oklch(63.1% 0.186 23.8)
-
Step 600
600 (this color)
#D42D37
oklch(56.9% 0.202 23.8)
-
Step 700
700
#B31526
oklch(49.1% 0.188 23.7)
-
Step 800
800
#911821
oklch(42.7% 0.155 23.7)
-
Step 900
900
#751D20
oklch(37.7% 0.122 23.5)
-
Step 950
950
#451313
oklch(27% 0.077 23.8)
#D42D37 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) | #615936 | 0.221 |
| Deuteranopia (no green cones) | #8A7D31 | 0.202 |
| Tritanopia (no blue cones) | #E90033 | 0.042 |
| Achromatopsia (no color) | #707070 | 0.203 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #D42D37
#D42D37
oklch(56.9% 0.202 23.8)
- #008791
#008791
oklch(56.8% 0.097 204)
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 #D42D37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Crimson #DC143C ΔE 0.025
- Cherry #CF0234 ΔE 0.034
- Lipstick #D5174E ΔE 0.040
- Faded Red #D3494E ΔE 0.040
- Imperial Red #E63946 ΔE 0.044
- Dull Red #BB3F3F ΔE 0.049
- Ruby #CA0147 ΔE 0.052
- Red Pantone #EF233C ΔE 0.052
Use #D42D37 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.