#DF3437
Closest named color: Imperial Red (#E63946). oklch(59.4% 0.207 25.5), rgb(223, 52, 55).
Aa
Black text reads best on this color (4.68:1).
About this color
#DF3437 is a medium-dark, vivid red. In OKLCH its lightness is 59%, its chroma 0.207 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Imperial Red (#E63946), ΔE 0.022 away. Black text reads best on it, at 4.68:1.
| Hue family | Reds |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.207) |
| Temperature | warm |
| Nearest name | Imperial Red (#E63946) |
| Black text | 4.68:1 |
| White text | 4.48:1 |
Values
| HEX | #DF3437 |
| RGB | rgb(223, 52, 55) |
| HSL | hsl(359, 73%, 54%) |
| OKLCH | oklch(59.4% 0.207 25.5) |
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 #DF3437 | 4.48:1 | AA large text | Lc -75.0 | Fine for body text |
| Black text on #DF3437 | 4.68:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #DF3437 text on white | 4.48:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #DF3437 text on black | 4.68:1 | AA | Lc -32.1 | 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 500.
-
Step 50
50
#FFF2F1
oklch(97.1% 0.014 22.8)
-
Step 100
100
#FDE3E0
oklch(93.6% 0.029 25.6)
-
Step 200
200
#FCCCC6
oklch(88.5% 0.055 26.5)
-
Step 300
300
#FBA79F
oklch(80.9% 0.101 25.5)
-
Step 400
400
#F5726B
oklch(70.7% 0.162 25.2)
-
Step 500
500 (this color)
#DF3437
oklch(59.4% 0.207 25.5)
-
Step 600
600
#D80221
oklch(55.6% 0.225 25.5)
-
Step 700
700
#B7001A
oklch(49.1% 0.199 25.4)
-
Step 800
800
#970014
oklch(42.6% 0.173 25.3)
-
Step 900
900
#791518
oklch(37.6% 0.134 25.3)
-
Step 950
950
#480F0F
oklch(27% 0.086 25.1)
#DF3437 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) | #695F35 | 0.224 |
| Deuteranopia (no green cones) | #938430 | 0.205 |
| Tritanopia (no blue cones) | #F50037 | 0.046 |
| Achromatopsia (no color) | #777777 | 0.208 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #DF3437
#DF3437
oklch(59.4% 0.207 25.5)
- #008F9C
#008F9C
oklch(59.4% 0.102 206.1)
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 #DF3437, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Imperial Red #E63946 ΔE 0.022
- Red Pantone #EF233C ΔE 0.032
- Crimson #DC143C ΔE 0.034
- Faded Red #D3494E ΔE 0.035
- Tomato Red #EC2D01 ΔE 0.037
- Pale Red #D9544D ΔE 0.046
- Cherry Red #F7022A ΔE 0.047
- Vermillion #F4320C ΔE 0.048
Use #DF3437 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.