#D51C3A
Closest named color: Crimson (#DC143C). oklch(56.1% 0.213 20.8), rgb(213, 28, 58).
Aa
White text reads best on this color (5.17:1).
About this color
#D51C3A is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.213 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Crimson (#DC143C), ΔE 0.014 away. White text reads best on it, at 5.17:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.213) |
| Temperature | warm |
| Nearest name | Crimson (#DC143C) |
| Black text | 4.05:1 |
| White text | 5.17:1 |
Values
| HEX | #D51C3A |
| RGB | rgb(213, 28, 58) |
| HSL | hsl(350, 77%, 47%) |
| OKLCH | oklch(56.1% 0.213 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 #D51C3A | 5.17:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #D51C3A | 4.05:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #D51C3A text on white | 5.17:1 | AA | Lc 73.6 | Content text, not long reading |
| #D51C3A text on black | 4.05:1 | AA large text | Lc -28.1 | 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
#F8A8A6
oklch(80.9% 0.095 20.9)
-
Step 400
400
#F17577
oklch(70.8% 0.153 20.8)
-
Step 500
500
#E84854
oklch(63.2% 0.196 20.7)
-
Step 600
600 (this color)
#D51C3A
oklch(56.1% 0.213 20.8)
-
Step 700
700
#B6002B
oklch(49.1% 0.197 20.8)
-
Step 800
800
#940D25
oklch(42.7% 0.164 20.6)
-
Step 900
900
#771922
oklch(37.7% 0.128 21)
-
Step 950
950
#461115
oklch(27% 0.081 20.2)
#D51C3A 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) | #5B5439 | 0.236 |
| Deuteranopia (no green cones) | #887A33 | 0.213 |
| Tritanopia (no blue cones) | #EB002B | 0.044 |
| Achromatopsia (no color) | #6D6D6D | 0.214 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #D51C3A
#D51C3A
oklch(56.1% 0.213 20.8)
- #00858C
#00858C
oklch(56.1% 0.095 201.3)
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 #D51C3A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Crimson #DC143C ΔE 0.014
- Cherry #CF0234 ΔE 0.021
- Lipstick #D5174E ΔE 0.027
- Ruby #CA0147 ΔE 0.038
- Lipstick Red #C0022F ΔE 0.050
- Imperial Red #E63946 ΔE 0.052
- Faded Red #D3494E ΔE 0.054
- Red Pantone #EF233C ΔE 0.055
Use #D51C3A 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.