#D21009
Closest named color: Cherry (#CF0234). oklch(54.7% 0.218 29.3), rgb(210, 16, 9).
Aa
White text reads best on this color (5.49:1).
About this color
#D21009 is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.218 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Cherry (#CF0234), ΔE 0.034 away. White text reads best on it, at 5.49:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.218) |
| Temperature | warm |
| Nearest name | Cherry (#CF0234) |
| Black text | 3.81:1 |
| White text | 5.49:1 |
Values
| HEX | #D21009 |
| RGB | rgb(210, 16, 9) |
| HSL | hsl(2, 92%, 43%) |
| OKLCH | oklch(54.7% 0.218 29.3) |
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 #D21009 | 5.49:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #D21009 | 3.81:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #D21009 text on white | 5.49:1 | AA | Lc 75.0 | Content text, not long reading |
| #D21009 text on black | 3.81:1 | AA large text | Lc -26.7 | 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
#FEF2F0
oklch(97% 0.013 28.9)
-
Step 100
100
#FCE3DF
oklch(93.5% 0.028 28.5)
-
Step 200
200
#FBCCC5
oklch(88.4% 0.054 28.1)
-
Step 300
300
#FAA99C
oklch(81% 0.098 29.4)
-
Step 400
400
#F37565
oklch(70.7% 0.158 29)
-
Step 500
500
#EA4839
oklch(63.1% 0.201 29.2)
-
Step 600
600 (this color)
#D21009
oklch(54.7% 0.218 29.3)
-
Step 700
700
#B80100
oklch(49.2% 0.201 29.3)
-
Step 800
800
#960C07
oklch(42.8% 0.169 29.2)
-
Step 900
900
#781911
oklch(37.7% 0.131 29.5)
-
Step 950
950
#47110C
oklch(27% 0.083 29)
#D21009 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) | #5A4F00 | 0.240 |
| Deuteranopia (no green cones) | #877700 | 0.212 |
| Tritanopia (no blue cones) | #E80015 | 0.044 |
| Achromatopsia (no color) | #696969 | 0.220 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #D21009
#D21009
oklch(54.7% 0.218 29.3)
- #007F8E
#007F8E
oklch(54.6% 0.094 209.2)
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 #D21009, closest first.
No curated palette has a color within ΔE 0.04 of #D21009.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cherry #CF0234 ΔE 0.034
- Crimson #DC143C ΔE 0.043
- Scarlet #BE0119 ΔE 0.046
- Lipstick Red #C0022F ΔE 0.050
- Sinopia #BB3E03 ΔE 0.059
- Ruby #CA0147 ΔE 0.061
- Dull Red #BB3F3F ΔE 0.061
- Lipstick #D5174E ΔE 0.061
Use #D21009 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.