#21E7B2
Closest named color: Aqua Marine (#2EE8BB). oklch(82.6% 0.162 168.1), rgb(33, 231, 178).
Aa
Black text reads best on this color (13.13:1).
About this color
#21E7B2 is a light, vivid green. In OKLCH its lightness is 83%, its chroma 0.162 and its hue 168°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Aqua Marine (#2EE8BB), ΔE 0.013 away. Black text reads best on it, at 13.13:1.
| Hue family | Greens |
| Lightness | light (83%) |
| Chroma | vivid (0.162) |
| Temperature | in between |
| Nearest name | Aqua Marine (#2EE8BB) |
| Black text | 13.13:1 |
| White text | 1.59:1 |
Values
| HEX | #21E7B2 |
| RGB | rgb(33, 231, 178) |
| HSL | hsl(164, 80%, 52%) |
| OKLCH | oklch(82.6% 0.162 168.1) |
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 #21E7B2 | 1.59:1 | Fails | Lc -29.9 | Dividers and decoration only |
| Black text on #21E7B2 | 13.13:1 | AAA | Lc 77.4 | Fine for body text |
| #21E7B2 text on white | 1.59:1 | Fails | Lc 26.4 | Dividers and decoration only |
| #21E7B2 text on black | 13.13:1 | AAA | Lc -76.6 | Fine for body text |
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
#E8FAF3
oklch(97% 0.021 170.6)
-
Step 100
100
#CDF5E4
oklch(93.7% 0.047 167.7)
-
Step 200
200
#9CEDCE
oklch(88.5% 0.091 168.2)
-
Step 300
300 (this color)
#21E7B2
oklch(82.6% 0.162 168.1)
-
Step 400
400
#00BC8F
oklch(70.6% 0.143 168)
-
Step 500
500
#00A17B
oklch(63% 0.127 168.5)
-
Step 600
600
#008867
oklch(55.7% 0.112 168.2)
-
Step 700
700
#007256
oklch(49% 0.099 168.4)
-
Step 800
800
#005E46
oklch(42.8% 0.087 168)
-
Step 900
900
#004E3A
oklch(37.7% 0.076 168.5)
-
Step 950
950
#002F21
oklch(27.1% 0.055 167.3)
#21E7B2 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) | #E1D6AF | 0.164 |
| Deuteranopia (no green cones) | #CAC6B6 | 0.157 |
| Tritanopia (no blue cones) | #00E8D8 | 0.052 |
| Achromatopsia (no color) | #CCCCCC | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21E7B2
#21E7B2
oklch(82.6% 0.162 168.1)
- #FFA6D3
#FFA6D3
oklch(82.6% 0.118 348.3)
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 #21E7B2, closest first.
No curated palette has a color within ΔE 0.04 of #21E7B2.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Marine #2EE8BB ΔE 0.013
- Aqua Green #12E193 ΔE 0.041
- Bright Teal #01F9C6 ΔE 0.049
- Emerald #06D6A0 ΔE 0.049
- Turquoise #40E0D0 ΔE 0.054
- Greenish Turquoise #00FBB0 ΔE 0.057
- Weird Green #3AE57F ΔE 0.062
- Greenish Cyan #2AFEB7 ΔE 0.064
Use #21E7B2 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.