#66DEBC
Closest named color: Turquoise (#40E0D0). oklch(82.2% 0.12 172.1), rgb(102, 222, 188).
Aa
Black text reads best on this color (12.73:1).
About this color
#66DEBC is a light, moderately saturated teal or cyan. In OKLCH its lightness is 82%, its chroma 0.120 and its hue 172°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.030 away. Black text reads best on it, at 12.73:1.
| Hue family | Teals and cyans |
| Lightness | light (82%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.73:1 |
| White text | 1.64:1 |
Values
| HEX | #66DEBC |
| RGB | rgb(102, 222, 188) |
| HSL | hsl(163, 65%, 64%) |
| OKLCH | oklch(82.2% 0.12 172.1) |
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 #66DEBC | 1.64:1 | Fails | Lc -32.1 | Non-text elements, placeholder text |
| Black text on #66DEBC | 12.73:1 | AAA | Lc 75.3 | Fine for body text |
| #66DEBC text on white | 1.64:1 | Fails | Lc 28.5 | Dividers and decoration only |
| #66DEBC text on black | 12.73:1 | AAA | Lc -74.4 | 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
#EBF9F4
oklch(97% 0.016 172.7)
-
Step 100
100
#D4F2E7
oklch(93.6% 0.035 171.5)
-
Step 200
200
#ADE8D4
oklch(88.5% 0.066 171.8)
-
Step 300
300 (this color)
#66DEBC
oklch(82.2% 0.12 172.1)
-
Step 400
400
#00BB97
oklch(70.6% 0.136 172.4)
-
Step 500
500
#00A181
oklch(63.2% 0.122 172)
-
Step 600
600
#00876C
oklch(55.5% 0.108 172.1)
-
Step 700
700
#00725A
oklch(49.2% 0.096 171.5)
-
Step 800
800
#005D4A
oklch(42.6% 0.082 172.5)
-
Step 900
900
#004E3D
oklch(37.8% 0.073 171.8)
-
Step 950
950
#002E23
oklch(26.8% 0.052 171.9)
#66DEBC 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) | #D8D1BA | 0.124 |
| Deuteranopia (no green cones) | #C6C4BE | 0.119 |
| Tritanopia (no blue cones) | #28E0D4 | 0.039 |
| Achromatopsia (no color) | #C9C9C9 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66DEBC
#66DEBC
oklch(82.2% 0.12 172.1)
- #FFA5CD
#FFA5CD
oklch(82.2% 0.116 351.8)
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 #66DEBC, closest first.
No curated palette has a color within ΔE 0.04 of #66DEBC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.030
- Seafoam Blue #78D1B6 ΔE 0.035
- Aqua Marine #2EE8BB ΔE 0.037
- Light Teal #90E4C1 ΔE 0.042
- Medium Aquamarine #66CDAA ΔE 0.047
- Tiffany Blue #94D2BD ΔE 0.050
- Pale Teal #82CBB2 ΔE 0.052
- Medium Turquoise #48D1CC ΔE 0.053
Use #66DEBC 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.