#21D49E
Closest named color: Emerald (#06D6A0). oklch(77.4% 0.155 165.8), rgb(33, 212, 158).
Aa
Black text reads best on this color (10.97:1).
About this color
#21D49E is a medium-light, vivid green. In OKLCH its lightness is 77%, its chroma 0.155 and its hue 166°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald (#06D6A0), ΔE 0.006 away. Black text reads best on it, at 10.97:1.
| Hue family | Greens |
| Lightness | medium-light (77%) |
| Chroma | vivid (0.155) |
| Temperature | in between |
| Nearest name | Emerald (#06D6A0) |
| Black text | 10.97:1 |
| White text | 1.91:1 |
Values
| HEX | #21D49E |
| RGB | rgb(33, 212, 158) |
| HSL | hsl(162, 73%, 48%) |
| OKLCH | oklch(77.4% 0.155 165.8) |
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 #21D49E | 1.91:1 | Fails | Lc -40.2 | Non-text elements, placeholder text |
| Black text on #21D49E | 10.97:1 | AAA | Lc 67.9 | Content text, not long reading |
| #21D49E text on white | 1.91:1 | Fails | Lc 36.0 | Non-text elements, placeholder text |
| #21D49E text on black | 10.97:1 | AAA | Lc -66.5 | 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
#E9FAF2
oklch(97% 0.021 166.1)
-
Step 100
100
#CFF4E3
oklch(93.6% 0.045 165.9)
-
Step 200
200
#A1ECCC
oklch(88.5% 0.087 165.9)
-
Step 300
300 (this color)
#21D49E
oklch(77.4% 0.155 165.8)
-
Step 400
400
#00BD8B
oklch(70.8% 0.147 165.8)
-
Step 500
500
#00A277
oklch(63.2% 0.131 166)
-
Step 600
600
#008863
oklch(55.6% 0.116 165.8)
-
Step 700
700
#007353
oklch(49.2% 0.103 165.6)
-
Step 800
800
#005E43
oklch(42.7% 0.089 165.5)
-
Step 900
900
#004E38
oklch(37.6% 0.078 166.4)
-
Step 950
950
#002F20
oklch(27.1% 0.056 165.8)
#21D49E 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) | #CFC49B | 0.154 |
| Deuteranopia (no green cones) | #BBB5A2 | 0.150 |
| Tritanopia (no blue cones) | #00D5C5 | 0.054 |
| Achromatopsia (no color) | #BBBBBB | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21D49E
#21D49E
oklch(77.4% 0.155 165.8)
- #FB8ACB
#FB8ACB
oklch(77.5% 0.156 345.8)
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 #21D49E, closest first.
No curated palette has a color within ΔE 0.04 of #21D49E.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald #06D6A0 ΔE 0.006
- Aqua Green #12E193 ΔE 0.044
- Seaweed #18D17B ΔE 0.045
- Greenblue #23C48B ΔE 0.046
- Medium Aquamarine #66CDAA ΔE 0.046
- Green Blue #01C08D ΔE 0.058
- Aqua Marine #2EE8BB ΔE 0.061
- Soft Green #6FC276 ΔE 0.063
Use #21D49E 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.