#21DDAE
Closest named color: Emerald (#06D6A0). oklch(80.1% 0.154 169.7), rgb(33, 221, 174).
Aa
Black text reads best on this color (12.01:1).
About this color
#21DDAE is a light, vivid green. In OKLCH its lightness is 80%, its chroma 0.154 and its hue 170°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald (#06D6A0), ΔE 0.025 away. Black text reads best on it, at 12.01:1.
| Hue family | Greens |
| Lightness | light (80%) |
| Chroma | vivid (0.154) |
| Temperature | in between |
| Nearest name | Emerald (#06D6A0) |
| Black text | 12.01:1 |
| White text | 1.74:1 |
Values
| HEX | #21DDAE |
| RGB | rgb(33, 221, 174) |
| HSL | hsl(165, 74%, 50%) |
| OKLCH | oklch(80.1% 0.154 169.7) |
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 #21DDAE | 1.74:1 | Fails | Lc -35.1 | Non-text elements, placeholder text |
| Black text on #21DDAE | 12.01:1 | AAA | Lc 72.6 | Content text, not long reading |
| #21DDAE text on white | 1.74:1 | Fails | Lc 31.3 | Non-text elements, placeholder text |
| #21DDAE text on black | 12.01:1 | AAA | Lc -71.5 | 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
#9FECD0
oklch(88.5% 0.086 169.5)
-
Step 300
300 (this color)
#21DDAE
oklch(80.1% 0.154 169.7)
-
Step 400
400
#00BC93
oklch(70.7% 0.14 169.9)
-
Step 500
500
#00A17D
oklch(63% 0.125 169.6)
-
Step 600
600
#008869
oklch(55.7% 0.111 169.5)
-
Step 700
700
#007258
oklch(49.1% 0.097 169.9)
-
Step 800
800
#005E47
oklch(42.8% 0.086 168.9)
-
Step 900
900
#004E3B
oklch(37.7% 0.075 169.6)
-
Step 950
950
#002F22
oklch(27.1% 0.054 168.9)
#21DDAE 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) | #D7CDAC | 0.157 |
| Deuteranopia (no green cones) | #C1BDB1 | 0.151 |
| Tritanopia (no blue cones) | #00DFD0 | 0.046 |
| Achromatopsia (no color) | #C4C4C4 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21DDAE
#21DDAE
oklch(80.1% 0.154 169.7)
- #FF98CB
#FF98CB
oklch(80.1% 0.137 349.6)
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 #21DDAE, closest first.
No curated palette has a color within ΔE 0.04 of #21DDAE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald #06D6A0 ΔE 0.025
- Aqua Marine #2EE8BB ΔE 0.032
- Aqua Green #12E193 ΔE 0.042
- Turquoise #40E0D0 ΔE 0.050
- Medium Aquamarine #66CDAA ΔE 0.050
- Seafoam Blue #78D1B6 ΔE 0.059
- Medium Turquoise #48D1CC ΔE 0.065
- Seaweed #18D17B ΔE 0.067
Use #21DDAE 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.