#66DDBA
Closest named color: Turquoise (#40E0D0). oklch(81.9% 0.12 171.3), rgb(102, 221, 186).
Aa
Black text reads best on this color (12.61:1).
About this color
#66DDBA is a light, moderately saturated teal or cyan. In OKLCH its lightness is 82%, its chroma 0.120 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.032 away. Black text reads best on it, at 12.61:1.
| Hue family | Teals and cyans |
| Lightness | light (82%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.61:1 |
| White text | 1.66:1 |
Values
| HEX | #66DDBA |
| RGB | rgb(102, 221, 186) |
| HSL | hsl(162, 64%, 63%) |
| OKLCH | oklch(81.9% 0.12 171.3) |
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 #66DDBA | 1.66:1 | Fails | Lc -32.7 | Non-text elements, placeholder text |
| Black text on #66DDBA | 12.61:1 | AAA | Lc 74.8 | Content text, not long reading |
| #66DDBA text on white | 1.66:1 | Fails | Lc 29.0 | Dividers and decoration only |
| #66DDBA text on black | 12.61:1 | AAA | Lc -73.9 | 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
#EBF9F4
oklch(97% 0.016 172.7)
-
Step 100
100
#D4F2E7
oklch(93.6% 0.035 171.5)
-
Step 200
200
#ADE8D3
oklch(88.5% 0.067 170.8)
-
Step 300
300 (this color)
#66DDBA
oklch(81.9% 0.12 171.3)
-
Step 400
400
#00BC96
oklch(70.8% 0.138 171.4)
-
Step 500
500
#00A180
oklch(63.1% 0.123 171.4)
-
Step 600
600
#00876B
oklch(55.5% 0.108 171.4)
-
Step 700
700
#00725A
oklch(49.2% 0.096 171.5)
-
Step 800
800
#005D49
oklch(42.6% 0.083 171.6)
-
Step 900
900
#004E3D
oklch(37.8% 0.073 171.8)
-
Step 950
950
#002F23
oklch(27.2% 0.053 170.5)
#66DDBA 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) | #D7D0B8 | 0.123 |
| Deuteranopia (no green cones) | #C5C3BC | 0.118 |
| Tritanopia (no blue cones) | #2ADFD3 | 0.040 |
| Achromatopsia (no color) | #C9C9C9 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66DDBA
#66DDBA
oklch(81.9% 0.12 171.3)
- #FFA3CD
#FFA3CD
oklch(81.9% 0.12 351.2)
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 #66DDBA, closest first.
No curated palette has a color within ΔE 0.04 of #66DDBA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.032
- Seafoam Blue #78D1B6 ΔE 0.033
- Aqua Marine #2EE8BB ΔE 0.038
- Medium Aquamarine #66CDAA ΔE 0.044
- Light Teal #90E4C1 ΔE 0.044
- Tiffany Blue #94D2BD ΔE 0.050
- Pale Teal #82CBB2 ΔE 0.050
- Medium Turquoise #48D1CC ΔE 0.053
Use #66DDBA 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.