#21DFC6
Closest named color: Turquoise (#40E0D0). oklch(81.2% 0.142 180.6), rgb(33, 223, 198).
Aa
Black text reads best on this color (12.43:1).
About this color
#21DFC6 is a light, vivid teal or cyan. In OKLCH its lightness is 81%, its chroma 0.142 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.019 away. Black text reads best on it, at 12.43:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.43:1 |
| White text | 1.68:1 |
Values
| HEX | #21DFC6 |
| RGB | rgb(33, 223, 198) |
| HSL | hsl(172, 75%, 50%) |
| OKLCH | oklch(81.2% 0.142 180.6) |
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 #21DFC6 | 1.68:1 | Fails | Lc -33.2 | Non-text elements, placeholder text |
| Black text on #21DFC6 | 12.43:1 | AAA | Lc 74.4 | Content text, not long reading |
| #21DFC6 text on white | 1.68:1 | Fails | Lc 29.4 | Dividers and decoration only |
| #21DFC6 text on black | 12.43:1 | AAA | Lc -73.4 | 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
#E9FAF6
oklch(97.1% 0.019 180.3)
-
Step 100
100
#CDF3EB
oklch(93.5% 0.041 181.2)
-
Step 200
200
#9EEBDC
oklch(88.6% 0.079 180.8)
-
Step 300
300 (this color)
#21DFC6
oklch(81.2% 0.142 180.6)
-
Step 400
400
#00BAA4
oklch(70.7% 0.128 180.3)
-
Step 500
500
#009F8D
oklch(63% 0.114 181)
-
Step 600
600
#008676
oklch(55.6% 0.1 180.5)
-
Step 700
700
#007163
oklch(49.2% 0.089 180.3)
-
Step 800
800
#005C51
oklch(42.6% 0.077 181.1)
-
Step 900
900
#004D43
oklch(37.7% 0.068 180.3)
-
Step 950
950
#002E28
oklch(27% 0.049 181.5)
#21DFC6 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) | #D5D1C5 | 0.151 |
| Deuteranopia (no green cones) | #BEC0C8 | 0.144 |
| Tritanopia (no blue cones) | #00E3D7 | 0.023 |
| Achromatopsia (no color) | #C7C7C7 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21DFC6
#21DFC6
oklch(81.2% 0.142 180.6)
- #FFA2BE
#FFA2BE
oklch(81.3% 0.115 0.5)
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 #21DFC6, closest first.
No curated palette has a color within ΔE 0.04 of #21DFC6.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.019
- Aqua Marine #2EE8BB ΔE 0.034
- Medium Turquoise #48D1CC ΔE 0.044
- Seafoam Blue #78D1B6 ΔE 0.052
- Emerald #06D6A0 ΔE 0.053
- Medium Aquamarine #66CDAA ΔE 0.055
- Dark Turquoise #00CED1 ΔE 0.057
- Aqua Blue #02D8E9 ΔE 0.060
Use #21DFC6 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.