#21DEEC
Closest named color: Aqua Blue (#02D8E9). oklch(82.2% 0.136 203.2), rgb(33, 222, 236).
Aa
Black text reads best on this color (12.72:1).
About this color
#21DEEC is a light, moderately saturated teal or cyan. In OKLCH its lightness is 82%, its chroma 0.136 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.018 away. Black text reads best on it, at 12.72:1.
| Hue family | Teals and cyans |
| Lightness | light (82%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 12.72:1 |
| White text | 1.65:1 |
Values
| HEX | #21DEEC |
| RGB | rgb(33, 222, 236) |
| HSL | hsl(184, 84%, 53%) |
| OKLCH | oklch(82.2% 0.136 203.2) |
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 #21DEEC | 1.65:1 | Fails | Lc -31.8 | Non-text elements, placeholder text |
| Black text on #21DEEC | 12.72:1 | AAA | Lc 75.6 | Fine for body text |
| #21DEEC text on white | 1.65:1 | Fails | Lc 28.2 | Dividers and decoration only |
| #21DEEC text on black | 12.72:1 | AAA | Lc -74.7 | 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
#E8F9FB
oklch(97% 0.018 205.3)
-
Step 100
100
#CCF2F6
oklch(93.5% 0.04 204.3)
-
Step 200
200
#9CE8EF
oklch(88.4% 0.075 203.2)
-
Step 300
300 (this color)
#21DEEC
oklch(82.2% 0.136 203.2)
-
Step 400
400
#00B6C2
oklch(70.7% 0.12 203.2)
-
Step 500
500
#009CA6
oklch(63.1% 0.107 202.8)
-
Step 600
600
#00838C
oklch(55.6% 0.095 203.3)
-
Step 700
700
#006E76
oklch(49.1% 0.084 203.6)
-
Step 800
800
#005A61
oklch(42.6% 0.073 204)
-
Step 900
900
#004B51
oklch(37.6% 0.064 204)
-
Step 950
950
#002D30
oklch(27% 0.046 201.8)
#21DEEC 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) | #CBD4ED | 0.135 |
| Deuteranopia (no green cones) | #B2C1ED | 0.126 |
| Tritanopia (no blue cones) | #00E7E2 | 0.033 |
| Achromatopsia (no color) | #C9C9C9 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21DEEC
#21DEEC
oklch(82.2% 0.136 203.2)
- #FFABA6
#FFABA6
oklch(82.1% 0.1 23.2)
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 #21DEEC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.018
- Turquoise #40E0D0 ΔE 0.042
- Medium Turquoise #48D1CC ΔE 0.048
- Dark Turquoise #00CED1 ΔE 0.053
- Vivid Sky Blue #4CC9F0 ΔE 0.060
- Robin's Egg #6DEDFD ΔE 0.062
- Bright Sky Blue #02CCFE ΔE 0.064
- Bright Light Blue #26F7FD ΔE 0.068
Use #21DEEC 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.