#21E7D2
Closest named color: Turquoise (#40E0D0). oklch(83.5% 0.145 183.1), rgb(33, 231, 210).
Aa
Black text reads best on this color (13.42:1).
About this color
#21E7D2 is a light, vivid teal or cyan. In OKLCH its lightness is 84%, its chroma 0.145 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.020 away. Black text reads best on it, at 13.42:1.
| Hue family | Teals and cyans |
| Lightness | light (84%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 13.42:1 |
| White text | 1.56:1 |
Values
| HEX | #21E7D2 |
| RGB | rgb(33, 231, 210) |
| HSL | hsl(174, 80%, 52%) |
| OKLCH | oklch(83.5% 0.145 183.1) |
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 #21E7D2 | 1.56:1 | Fails | Lc -28.5 | Dividers and decoration only |
| Black text on #21E7D2 | 13.42:1 | AAA | Lc 78.6 | Fine for body text |
| #21E7D2 text on white | 1.56:1 | Fails | Lc 25.2 | Dividers and decoration only |
| #21E7D2 text on black | 13.42:1 | AAA | Lc -77.9 | 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
#E8FAF7
oklch(97.1% 0.019 184.9)
-
Step 100
100
#CCF4EC
oklch(93.7% 0.043 181.9)
-
Step 200
200
#9BEBDE
oklch(88.5% 0.081 183.1)
-
Step 300
300 (this color)
#21E7D2
oklch(83.5% 0.145 183.1)
-
Step 400
400
#00BAA8
oklch(70.8% 0.126 182.8)
-
Step 500
500
#009F90
oklch(63.1% 0.112 183.2)
-
Step 600
600
#008679
oklch(55.7% 0.099 183.1)
-
Step 700
700
#007065
oklch(49% 0.087 183.1)
-
Step 800
800
#005C53
oklch(42.6% 0.076 183.4)
-
Step 900
900
#004D45
oklch(37.7% 0.067 183.1)
-
Step 950
950
#002E29
oklch(27.1% 0.048 183.6)
#21E7D2 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) | #DBD9D1 | 0.153 |
| Deuteranopia (no green cones) | #C3C7D4 | 0.146 |
| Tritanopia (no blue cones) | #00ECE0 | 0.020 |
| Achromatopsia (no color) | #CFCFCF | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21E7D2
#21E7D2
oklch(83.5% 0.145 183.1)
- #FFAFC3
#FFAFC3
oklch(83.6% 0.096 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 #21E7D2, closest first.
No curated palette has a color within ΔE 0.04 of #21E7D2.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.020
- Aqua Marine #2EE8BB ΔE 0.033
- Bright Aqua #0BF9EA ΔE 0.051
- Bright Teal #01F9C6 ΔE 0.058
- Medium Turquoise #48D1CC ΔE 0.059
- Aqua Blue #02D8E9 ΔE 0.062
- Light Teal #90E4C1 ΔE 0.063
- Bright Light Blue #26F7FD ΔE 0.065
Use #21E7D2 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.