#21DEAD
Closest named color: Emerald (#06D6A0). oklch(80.3% 0.156 168.9), rgb(33, 222, 173).
Aa
Black text reads best on this color (12.11:1).
About this color
#21DEAD is a light, vivid green. In OKLCH its lightness is 80%, its chroma 0.156 and its hue 169°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald (#06D6A0), ΔE 0.026 away. Black text reads best on it, at 12.11:1.
| Hue family | Greens |
| Lightness | light (80%) |
| Chroma | vivid (0.156) |
| Temperature | in between |
| Nearest name | Emerald (#06D6A0) |
| Black text | 12.11:1 |
| White text | 1.73:1 |
Values
| HEX | #21DEAD |
| RGB | rgb(33, 222, 173) |
| HSL | hsl(164, 74%, 50%) |
| OKLCH | oklch(80.3% 0.156 168.9) |
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 #21DEAD | 1.73:1 | Fails | Lc -34.7 | Non-text elements, placeholder text |
| Black text on #21DEAD | 12.11:1 | AAA | Lc 73.0 | Content text, not long reading |
| #21DEAD text on white | 1.73:1 | Fails | Lc 30.8 | Non-text elements, placeholder text |
| #21DEAD text on black | 12.11:1 | AAA | Lc -71.9 | Content text, not long reading |
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 300.
-
Step 50
50
#E9FAF3
oklch(97.1% 0.02 169.4)
-
Step 100
100
#CEF4E5
oklch(93.6% 0.044 169.5)
-
Step 200
200
#9FECCF
oklch(88.5% 0.086 168.7)
-
Step 300
300 (this color)
#21DEAD
oklch(80.3% 0.156 168.9)
-
Step 400
400
#00BC91
oklch(70.7% 0.142 168.9)
-
Step 500
500
#00A17C
oklch(63% 0.126 169.1)
-
Step 600
600
#008868
oklch(55.7% 0.112 168.9)
-
Step 700
700
#007257
oklch(49.1% 0.098 169.1)
-
Step 800
800
#005E47
oklch(42.8% 0.086 168.9)
-
Step 900
900
#004E3A
oklch(37.7% 0.076 168.5)
-
Step 950
950
#002F22
oklch(27.1% 0.054 168.9)
#21DEAD 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) | #D8CEAA | 0.158 |
| Deuteranopia (no green cones) | #C2BEB0 | 0.152 |
| Tritanopia (no blue cones) | #00DFD0 | 0.048 |
| Achromatopsia (no color) | #C5C5C5 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21DEAD
#21DEAD
oklch(80.3% 0.156 168.9)
- #FF99CD
#FF99CD
oklch(80.3% 0.136 348.7)
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 #21DEAD, closest first.
No curated palette has a color within ΔE 0.04 of #21DEAD.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald #06D6A0 ΔE 0.026
- Aqua Marine #2EE8BB ΔE 0.031
- Aqua Green #12E193 ΔE 0.039
- Turquoise #40E0D0 ΔE 0.051
- Medium Aquamarine #66CDAA ΔE 0.053
- Seafoam Blue #78D1B6 ΔE 0.061
- Seaweed #18D17B ΔE 0.066
- Weird Green #3AE57F ΔE 0.067
Use #21DEAD 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.