#21DA9D
Closest named color: Emerald (#06D6A0). oklch(78.9% 0.163 163.7), rgb(33, 218, 157).
Aa
Black text reads best on this color (11.58:1).
About this color
#21DA9D is a light, vivid green. In OKLCH its lightness is 79%, its chroma 0.163 and its hue 164°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald (#06D6A0), ΔE 0.014 away. Black text reads best on it, at 11.58:1.
| Hue family | Greens |
| Lightness | light (79%) |
| Chroma | vivid (0.163) |
| Temperature | in between |
| Nearest name | Emerald (#06D6A0) |
| Black text | 11.58:1 |
| White text | 1.81:1 |
Values
| HEX | #21DA9D |
| RGB | rgb(33, 218, 157) |
| HSL | hsl(160, 74%, 49%) |
| OKLCH | oklch(78.9% 0.163 163.7) |
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 #21DA9D | 1.81:1 | Fails | Lc -37.2 | Non-text elements, placeholder text |
| Black text on #21DA9D | 11.58:1 | AAA | Lc 70.7 | Content text, not long reading |
| #21DA9D text on white | 1.81:1 | Fails | Lc 33.2 | Non-text elements, placeholder text |
| #21DA9D text on black | 11.58:1 | AAA | Lc -69.4 | 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
#E9FAF1
oklch(97% 0.021 163.1)
-
Step 100
100
#CEF4E1
oklch(93.5% 0.047 163.8)
-
Step 200
200
#A0EDC9
oklch(88.6% 0.091 163.6)
-
Step 300
300 (this color)
#21DA9D
oklch(78.9% 0.163 163.7)
-
Step 400
400
#00BD86
oklch(70.7% 0.151 163.7)
-
Step 500
500
#00A273
oklch(63.1% 0.134 164)
-
Step 600
600
#008860
oklch(55.5% 0.118 164)
-
Step 700
700
#007350
oklch(49.2% 0.105 163.6)
-
Step 800
800
#005E41
oklch(42.7% 0.091 163.9)
-
Step 900
900
#004F36
oklch(37.9% 0.081 163.8)
-
Step 950
950
#002F1E
oklch(27% 0.058 163)
#21DA9D 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) | #D6C99A | 0.160 |
| Deuteranopia (no green cones) | #C1BAA1 | 0.155 |
| Tritanopia (no blue cones) | #00DAC9 | 0.061 |
| Achromatopsia (no color) | #C0C0C0 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21DA9D
#21DA9D
oklch(78.9% 0.163 163.7)
- #FF8ED3
#FF8ED3
oklch(78.8% 0.158 343.9)
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 #21DA9D, closest first.
No curated palette has a color within ΔE 0.04 of #21DA9D.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald #06D6A0 ΔE 0.014
- Aqua Green #12E193 ΔE 0.027
- Seaweed #18D17B ΔE 0.045
- Aqua Marine #2EE8BB ΔE 0.049
- Weird Green #3AE57F ΔE 0.056
- Medium Aquamarine #66CDAA ΔE 0.056
- Greenblue #23C48B ΔE 0.061
- Seafoam Blue #78D1B6 ΔE 0.071
Use #21DA9D 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.