#21DAD7
Closest named color: Turquoise (#40E0D0). oklch(80.5% 0.134 193), rgb(33, 218, 215).
Aa
Black text reads best on this color (12.07:1).
About this color
#21DAD7 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.134 and its hue 193°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.025 away. Black text reads best on it, at 12.07:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.07:1 |
| White text | 1.73:1 |
Values
| HEX | #21DAD7 |
| RGB | rgb(33, 218, 215) |
| HSL | hsl(179, 74%, 49%) |
| OKLCH | oklch(80.5% 0.134 193) |
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 #21DAD7 | 1.73:1 | Fails | Lc -34.9 | Non-text elements, placeholder text |
| Black text on #21DAD7 | 12.07:1 | AAA | Lc 72.8 | Content text, not long reading |
| #21DAD7 text on white | 1.73:1 | Fails | Lc 31.0 | Non-text elements, placeholder text |
| #21DAD7 text on black | 12.07:1 | AAA | Lc -71.7 | 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
#E9FAF9
oklch(97.2% 0.018 192.6)
-
Step 100
100
#CDF3F1
oklch(93.7% 0.039 192.6)
-
Step 200
200
#9EE9E6
oklch(88.4% 0.074 192.7)
-
Step 300
300 (this color)
#21DAD7
oklch(80.5% 0.134 193)
-
Step 400
400
#00B8B5
oklch(70.8% 0.121 192.7)
-
Step 500
500
#009E9B
oklch(63.2% 0.108 192.4)
-
Step 600
600
#008483
oklch(55.5% 0.095 193.8)
-
Step 700
700
#006F6E
oklch(49% 0.084 193.7)
-
Step 800
800
#005B5A
oklch(42.6% 0.073 193.5)
-
Step 900
900
#004C4B
oklch(37.7% 0.064 193.2)
-
Step 950
950
#002D2D
oklch(26.9% 0.046 194.8)
#21DAD7 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) | #CCCED7 | 0.141 |
| Deuteranopia (no green cones) | #B4BDD8 | 0.131 |
| Tritanopia (no blue cones) | #00E1D9 | 0.019 |
| Achromatopsia (no color) | #C4C4C4 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21DAD7
#21DAD7
oklch(80.5% 0.134 193)
- #FFA1AB
#FFA1AB
oklch(80.6% 0.112 13)
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 #21DAD7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.025
- Medium Turquoise #48D1CC ΔE 0.026
- Aqua Blue #02D8E9 ΔE 0.028
- Dark Turquoise #00CED1 ΔE 0.035
- Seafoam Blue #78D1B6 ΔE 0.057
- Medium Aquamarine #66CDAA ΔE 0.063
- Aqua Marine #2EE8BB ΔE 0.065
- Pale Teal #82CBB2 ΔE 0.069
Use #21DAD7 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.