#66DECB
Closest named color: Turquoise (#40E0D0). oklch(82.6% 0.112 181.6), rgb(102, 222, 203).
Aa
Black text reads best on this color (12.87:1).
About this color
#66DECB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 83%, its chroma 0.112 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.021 away. Black text reads best on it, at 12.87:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.87:1 |
| White text | 1.63:1 |
Values
| HEX | #66DECB |
| RGB | rgb(102, 222, 203) |
| HSL | hsl(171, 65%, 64%) |
| OKLCH | oklch(82.6% 0.112 181.6) |
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 #66DECB | 1.63:1 | Fails | Lc -31.5 | Non-text elements, placeholder text |
| Black text on #66DECB | 12.87:1 | AAA | Lc 75.9 | Fine for body text |
| #66DECB text on white | 1.63:1 | Fails | Lc 27.9 | Dividers and decoration only |
| #66DECB text on black | 12.87:1 | AAA | Lc -75.0 | 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
#EBF9F6
oklch(97.1% 0.015 181.8)
-
Step 100
100
#D3F1EB
oklch(93.5% 0.032 182.2)
-
Step 200
200
#ACE7DC
oklch(88.5% 0.062 182.1)
-
Step 300
300 (this color)
#66DECB
oklch(82.6% 0.112 181.6)
-
Step 400
400
#00BAA6
oklch(70.8% 0.127 181.5)
-
Step 500
500
#009F8E
oklch(63% 0.113 181.8)
-
Step 600
600
#008677
oklch(55.6% 0.1 181.4)
-
Step 700
700
#007164
oklch(49.2% 0.089 181.2)
-
Step 800
800
#005C52
oklch(42.6% 0.076 182.2)
-
Step 900
900
#004D44
oklch(37.7% 0.068 181.7)
-
Step 950
950
#002E28
oklch(27% 0.049 181.5)
#66DECB 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) | #D5D3CA | 0.118 |
| Deuteranopia (no green cones) | #C2C5CD | 0.112 |
| Tritanopia (no blue cones) | #0DE2D8 | 0.034 |
| Achromatopsia (no color) | #CACACA | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66DECB
#66DECB
oklch(82.6% 0.112 181.6)
- #FFAAC1
#FFAAC1
oklch(82.7% 0.103 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 #66DECB, closest first.
No curated palette has a color within ΔE 0.04 of #66DECB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.021
- Seafoam Blue #78D1B6 ΔE 0.038
- Light Teal #90E4C1 ΔE 0.043
- Medium Turquoise #48D1CC ΔE 0.045
- Tiffany Blue #94D2BD ΔE 0.046
- Aqua Marine #2EE8BB ΔE 0.049
- Pale Teal #82CBB2 ΔE 0.053
- Medium Aquamarine #66CDAA ΔE 0.056
Use #66DECB 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.