#DD3437
Closest named color: Imperial Red (#E63946). oklch(59.1% 0.205 25.4), rgb(221, 52, 55).
Aa
Black text reads best on this color (4.62:1).
About this color
#DD3437 is a medium-dark, vivid red. In OKLCH its lightness is 59%, its chroma 0.205 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Imperial Red (#E63946), ΔE 0.025 away. Black text reads best on it, at 4.62:1.
| Hue family | Reds |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.205) |
| Temperature | warm |
| Nearest name | Imperial Red (#E63946) |
| Black text | 4.62:1 |
| White text | 4.54:1 |
Values
| HEX | #DD3437 |
| RGB | rgb(221, 52, 55) |
| HSL | hsl(359, 71%, 54%) |
| OKLCH | oklch(59.1% 0.205 25.4) |
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 #DD3437 | 4.54:1 | AA | Lc -75.5 | Fine for body text |
| Black text on #DD3437 | 4.62:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #DD3437 text on white | 4.54:1 | AA | Lc 70.0 | Content text, not long reading |
| #DD3437 text on black | 4.62:1 | AA | Lc -31.7 | Non-text elements, placeholder text |
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
#FACDC8
oklch(88.6% 0.052 25.6)
-
Step 300
300
#F7AAA2
oklch(81% 0.092 25.9)
-
Step 400
400
#EE7870
oklch(70.7% 0.147 25.5)
-
Step 500
500
#E54D4A
oklch(63% 0.189 25.3)
-
Step 600
600 (this color)
#DD3437
oklch(59.1% 0.205 25.4)
-
Step 700
700
#B4121F
oklch(49.1% 0.191 25.4)
-
Step 800
800
#92161C
oklch(42.7% 0.158 25.3)
-
Step 900
900
#751D1C
oklch(37.7% 0.122 25.8)
-
Step 950
950
#451311
oklch(27% 0.077 26)
#DD3437 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) | #685F35 | 0.222 |
| Deuteranopia (no green cones) | #928330 | 0.203 |
| Tritanopia (no blue cones) | #F30037 | 0.046 |
| Achromatopsia (no color) | #767676 | 0.206 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #DD3437
#DD3437
oklch(59.1% 0.205 25.4)
- #008E9A
#008E9A
oklch(59% 0.101 205.3)
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 #DD3437, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Imperial Red #E63946 ΔE 0.025
- Crimson #DC143C ΔE 0.032
- Faded Red #D3494E ΔE 0.034
- Red Pantone #EF233C ΔE 0.036
- Tomato Red #EC2D01 ΔE 0.039
- Dark Coral #CF524E ΔE 0.047
- Pale Red #D9544D ΔE 0.047
- Cherry Red #F7022A ΔE 0.050
Use #DD3437 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.