#D51237
Closest named color: Crimson (#DC143C). oklch(55.7% 0.217 20.8), rgb(213, 18, 55).
Aa
White text reads best on this color (5.28:1).
About this color
#D51237 is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.217 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Crimson (#DC143C), ΔE 0.016 away. White text reads best on it, at 5.28:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.217) |
| Temperature | warm |
| Nearest name | Crimson (#DC143C) |
| Black text | 3.97:1 |
| White text | 5.28:1 |
Values
| HEX | #D51237 |
| RGB | rgb(213, 18, 55) |
| HSL | hsl(349, 84%, 45%) |
| OKLCH | oklch(55.7% 0.217 20.8) |
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 #D51237 | 5.28:1 | AA | Lc -79.4 | Fine for body text |
| Black text on #D51237 | 3.97:1 | AA large text | Lc 30.1 | Non-text elements, placeholder text |
| #D51237 text on white | 5.28:1 | AA | Lc 74.0 | Content text, not long reading |
| #D51237 text on black | 3.97:1 | AA large text | Lc -27.7 | 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
#FCE3E2
oklch(93.6% 0.028 20.4)
-
Step 200
200
#FBCCCA
oklch(88.5% 0.054 21.1)
-
Step 300
300
#FAA7A5
oklch(80.9% 0.099 21)
-
Step 400
400
#F27476
oklch(70.7% 0.155 20.9)
-
Step 500
500
#E94552
oklch(63% 0.2 20.8)
-
Step 600
600 (this color)
#D51237
oklch(55.7% 0.217 20.8)
-
Step 700
700
#B6002B
oklch(49.1% 0.197 20.8)
-
Step 800
800
#950823
oklch(42.7% 0.167 21)
-
Step 900
900
#781721
oklch(37.7% 0.131 21.1)
-
Step 950
950
#471014
oklch(27% 0.083 20.8)
#D51237 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) | #595236 | 0.241 |
| Deuteranopia (no green cones) | #877930 | 0.218 |
| Tritanopia (no blue cones) | #EB0026 | 0.046 |
| Achromatopsia (no color) | #6C6C6C | 0.219 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #D51237
#D51237
oklch(55.7% 0.217 20.8)
- #00848A
#00848A
oklch(55.8% 0.095 200.4)
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 #D51237, closest first.
No curated palette has a color within ΔE 0.04 of #D51237.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Crimson #DC143C ΔE 0.016
- Cherry #CF0234 ΔE 0.016
- Lipstick #D5174E ΔE 0.028
- Ruby #CA0147 ΔE 0.036
- Lipstick Red #C0022F ΔE 0.047
- Rose Red #BE013C ΔE 0.053
- Imperial Red #E63946 ΔE 0.056
- Scarlet #BE0119 ΔE 0.057
Use #D51237 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.