#DE0001
Closest named color: Crimson (#DC143C). oklch(56.6% 0.232 29.2), rgb(222, 0, 1).
Aa
White text reads best on this color (5.11:1).
About this color
#DE0001 is a medium-dark, vivid red. In OKLCH its lightness is 57%, its chroma 0.232 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Crimson (#DC143C), ΔE 0.038 away. White text reads best on it, at 5.11:1.
| Hue family | Reds |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.232) |
| Temperature | warm |
| Nearest name | Crimson (#DC143C) |
| Black text | 4.10:1 |
| White text | 5.11:1 |
Values
| HEX | #DE0001 |
| RGB | rgb(222, 0, 1) |
| HSL | hsl(360, 100%, 44%) |
| OKLCH | oklch(56.6% 0.232 29.2) |
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 #DE0001 | 5.11:1 | AA | Lc -77.7 | Fine for body text |
| Black text on #DE0001 | 4.10:1 | AA large text | Lc 31.8 | Non-text elements, placeholder text |
| #DE0001 text on white | 5.11:1 | AA | Lc 72.3 | Content text, not long reading |
| #DE0001 text on black | 4.10:1 | AA large text | Lc -29.4 | 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
#FEE3DE
oklch(93.6% 0.031 30.2)
-
Step 200
200
#FDCCC3
oklch(88.5% 0.057 30.3)
-
Step 300
300
#FDA79A
oklch(81% 0.104 29)
-
Step 400
400
#F77261
oklch(70.8% 0.167 29.3)
-
Step 500
500
#EF4032
oklch(63.1% 0.213 29.1)
-
Step 600
600 (this color)
#DE0001
oklch(56.6% 0.232 29.2)
-
Step 700
700
#B80001
oklch(49.1% 0.202 29.1)
-
Step 800
800
#980000
oklch(42.7% 0.175 29.2)
-
Step 900
900
#7B130C
oklch(37.8% 0.139 29.3)
-
Step 950
950
#490F0A
oklch(27.1% 0.088 29.1)
#DE0001 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) | #5E5200 | 0.254 |
| Deuteranopia (no green cones) | #8D7D00 | 0.226 |
| Tritanopia (no blue cones) | #F5000C | 0.047 |
| Achromatopsia (no color) | #6E6E6E | 0.234 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #DE0001
#DE0001
oklch(56.6% 0.232 29.2)
- #008595
#008595
oklch(56.5% 0.098 209.5)
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 #DE0001, closest first.
No curated palette has a color within ΔE 0.04 of #DE0001.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Crimson #DC143C ΔE 0.038
- Cherry #CF0234 ΔE 0.045
- Tomato Red #EC2D01 ΔE 0.045
- Red Pantone #EF233C ΔE 0.054
- Cherry Red #F7022A ΔE 0.055
- Imperial Red #E63946 ΔE 0.059
- Vermillion #F4320C ΔE 0.062
- Lipstick #D5174E ΔE 0.062
Use #DE0001 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.