#66CEDD
Closest named color: Medium Turquoise (#48D1CC). oklch(79.5% 0.098 207.9), rgb(102, 206, 221).
Aa
Black text reads best on this color (11.43:1).
About this color
#66CEDD is a light, moderately saturated teal or cyan. In OKLCH its lightness is 80%, its chroma 0.098 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Turquoise (#48D1CC), ΔE 0.036 away. Black text reads best on it, at 11.43:1.
| Hue family | Teals and cyans |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 11.43:1 |
| White text | 1.83:1 |
Values
| HEX | #66CEDD |
| RGB | rgb(102, 206, 221) |
| HSL | hsl(188, 64%, 63%) |
| OKLCH | oklch(79.5% 0.098 207.9) |
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 #66CEDD | 1.83:1 | Fails | Lc -38.3 | Non-text elements, placeholder text |
| Black text on #66CEDD | 11.43:1 | AAA | Lc 69.7 | Content text, not long reading |
| #66CEDD text on white | 1.83:1 | Fails | Lc 34.2 | Non-text elements, placeholder text |
| #66CEDD text on black | 11.43:1 | AAA | Lc -68.4 | 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
#ECF8FA
oklch(97.1% 0.013 208.8)
-
Step 100
100
#D5F0F4
oklch(93.7% 0.029 207.4)
-
Step 200
200
#B0E4EC
oklch(88.5% 0.054 207.9)
-
Step 300
300 (this color)
#66CEDD
oklch(79.5% 0.098 207.9)
-
Step 400
400
#00B5C8
oklch(70.7% 0.122 208)
-
Step 500
500
#009BAB
oklch(63% 0.108 207.7)
-
Step 600
600
#008290
oklch(55.5% 0.095 208)
-
Step 700
700
#006E7A
oklch(49.2% 0.085 207.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#004B53
oklch(37.7% 0.065 207)
-
Step 950
950
#002D32
oklch(27.1% 0.046 206.3)
#66CEDD 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) | #BFC7DE | 0.095 |
| Deuteranopia (no green cones) | #ACB9DD | 0.087 |
| Tritanopia (no blue cones) | #00D6D2 | 0.049 |
| Achromatopsia (no color) | #BFBFBF | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66CEDD
#66CEDD
oklch(79.5% 0.098 207.9)
- #F5A499
#F5A499
oklch(79.5% 0.098 28)
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 #66CEDD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.036
- Sky Blue #87CEEB ΔE 0.038
- Vivid Sky Blue #4CC9F0 ΔE 0.038
- Aqua Blue #02D8E9 ΔE 0.041
- Dark Turquoise #00CED1 ΔE 0.046
- Lightblue #7BC8F6 ΔE 0.049
- Light Sky Blue #87CEFA ΔE 0.055
- Light Cornflower Blue #98C1D9 ΔE 0.055
Use #66CEDD 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.