#D42F3B
Closest named color: Crimson (#DC143C). oklch(57.1% 0.2 22.9), rgb(212, 47, 59).
Aa
White text reads best on this color (4.91:1).
About this color
#D42F3B is a medium-dark, vivid red. In OKLCH its lightness is 57%, its chroma 0.200 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Crimson (#DC143C), ΔE 0.024 away. White text reads best on it, at 4.91:1.
| Hue family | Reds |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.200) |
| Temperature | warm |
| Nearest name | Crimson (#DC143C) |
| Black text | 4.26:1 |
| White text | 4.91:1 |
Values
| HEX | #D42F3B |
| RGB | rgb(212, 47, 59) |
| HSL | hsl(356, 66%, 51%) |
| OKLCH | oklch(57.1% 0.2 22.9) |
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 #D42F3B | 4.91:1 | AA | Lc -77.9 | Fine for body text |
| Black text on #D42F3B | 4.26:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #D42F3B text on white | 4.91:1 | AA | Lc 72.5 | Content text, not long reading |
| #D42F3B text on black | 4.26:1 | AA large text | Lc -29.2 | 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
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FBE4E2
oklch(93.7% 0.025 23.6)
-
Step 200
200
#F9CDCA
oklch(88.5% 0.05 22.7)
-
Step 300
300
#F5AAA5
oklch(80.9% 0.089 23.5)
-
Step 400
400
#ED7976
oklch(70.8% 0.144 22.9)
-
Step 500
500
#E34F52
oklch(63.1% 0.184 23)
-
Step 600
600 (this color)
#D42F3B
oklch(57.1% 0.2 22.9)
-
Step 700
700
#B21729
oklch(49.1% 0.186 23)
-
Step 800
800
#911923
oklch(42.8% 0.154 23.1)
-
Step 900
900
#741E21
oklch(37.7% 0.12 23.2)
-
Step 950
950
#451314
oklch(27% 0.077 22.7)
#D42F3B 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) | #625A3A | 0.218 |
| Deuteranopia (no green cones) | #8B7D35 | 0.199 |
| Tritanopia (no blue cones) | #E90035 | 0.042 |
| Achromatopsia (no color) | #707070 | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #D42F3B
#D42F3B
oklch(57.1% 0.2 22.9)
- #008891
#008891
oklch(57.1% 0.097 203)
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 #D42F3B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Crimson #DC143C ΔE 0.024
- Cherry #CF0234 ΔE 0.036
- Faded Red #D3494E ΔE 0.037
- Lipstick #D5174E ΔE 0.038
- Imperial Red #E63946 ΔE 0.042
- Dull Red #BB3F3F ΔE 0.048
- Dark Coral #CF524E ΔE 0.051
- Red Pantone #EF233C ΔE 0.052
Use #D42F3B 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.