#D90308
Closest named color: Crimson (#DC143C). oklch(55.7% 0.227 28.7), rgb(217, 3, 8).
Aa
White text reads best on this color (5.29:1).
About this color
#D90308 is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.227 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Crimson (#DC143C), ΔE 0.037 away. White text reads best on it, at 5.29:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.227) |
| Temperature | warm |
| Nearest name | Crimson (#DC143C) |
| Black text | 3.96:1 |
| White text | 5.29:1 |
Values
| HEX | #D90308 |
| RGB | rgb(217, 3, 8) |
| HSL | hsl(359, 97%, 43%) |
| OKLCH | oklch(55.7% 0.227 28.7) |
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 #D90308 | 5.29:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #D90308 | 3.96:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #D90308 text on white | 5.29:1 | AA | Lc 73.5 | Content text, not long reading |
| #D90308 text on black | 3.96:1 | AA large text | Lc -28.2 | 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
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FDE3DF
oklch(93.6% 0.029 28.1)
-
Step 200
200
#FDCCC4
oklch(88.6% 0.057 29)
-
Step 300
300
#FCA79B
oklch(80.9% 0.103 28.3)
-
Step 400
400
#F57363
oklch(70.7% 0.163 28.9)
-
Step 500
500
#ED4336
oklch(63.1% 0.209 28.8)
-
Step 600
600 (this color)
#D90308
oklch(55.7% 0.227 28.7)
-
Step 700
700
#B80004
oklch(49.2% 0.201 28.8)
-
Step 800
800
#980003
oklch(42.7% 0.175 28.7)
-
Step 900
900
#7A150F
oklch(37.7% 0.136 28.9)
-
Step 950
950
#48100B
oklch(27.1% 0.086 29)
#D90308 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) | #5C5000 | 0.249 |
| Deuteranopia (no green cones) | #8A7A00 | 0.221 |
| Tritanopia (no blue cones) | #F0000F | 0.047 |
| Achromatopsia (no color) | #6B6B6B | 0.229 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #D90308
#D90308
oklch(55.7% 0.227 28.7)
- #008391
#008391
oklch(55.8% 0.096 207.9)
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 #D90308, closest first.
No curated palette has a color within ΔE 0.04 of #D90308.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Crimson #DC143C ΔE 0.037
- Cherry #CF0234 ΔE 0.037
- Tomato Red #EC2D01 ΔE 0.054
- Scarlet #BE0119 ΔE 0.058
- Lipstick Red #C0022F ΔE 0.059
- Lipstick #D5174E ΔE 0.059
- Red Pantone #EF233C ΔE 0.061
- Imperial Red #E63946 ΔE 0.063
Use #D90308 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.