#66DFBC
Closest named color: Turquoise (#40E0D0). oklch(82.5% 0.121 171.6), rgb(102, 223, 188).
Aa
Black text reads best on this color (12.84:1).
About this color
#66DFBC is a light, moderately saturated teal or cyan. In OKLCH its lightness is 82%, its chroma 0.121 and its hue 172°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.031 away. Black text reads best on it, at 12.84:1.
| Hue family | Teals and cyans |
| Lightness | light (82%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.84:1 |
| White text | 1.63:1 |
Values
| HEX | #66DFBC |
| RGB | rgb(102, 223, 188) |
| HSL | hsl(163, 65%, 64%) |
| OKLCH | oklch(82.5% 0.121 171.6) |
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 #66DFBC | 1.63:1 | Fails | Lc -31.6 | Non-text elements, placeholder text |
| Black text on #66DFBC | 12.84:1 | AAA | Lc 75.8 | Fine for body text |
| #66DFBC text on white | 1.63:1 | Fails | Lc 28.0 | Dividers and decoration only |
| #66DFBC text on black | 12.84:1 | AAA | Lc -74.9 | 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
#ACE8D4
oklch(88.5% 0.067 172.1)
-
Step 300
300 (this color)
#66DFBC
oklch(82.5% 0.121 171.6)
-
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)
#66DFBC 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) | #D9D2BA | 0.125 |
| Deuteranopia (no green cones) | #C7C5BE | 0.119 |
| Tritanopia (no blue cones) | #27E1D5 | 0.040 |
| Achromatopsia (no color) | #CACACA | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66DFBC
#66DFBC
oklch(82.5% 0.121 171.6)
- #FFA6CE
#FFA6CE
oklch(82.4% 0.115 351.4)
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 #66DFBC, closest first.
No curated palette has a color within ΔE 0.04 of #66DFBC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.031
- Aqua Marine #2EE8BB ΔE 0.035
- Seafoam Blue #78D1B6 ΔE 0.038
- Light Teal #90E4C1 ΔE 0.041
- Medium Aquamarine #66CDAA ΔE 0.049
- Tiffany Blue #94D2BD ΔE 0.052
- Pale Teal #82CBB2 ΔE 0.054
- Hospital Green #9BE5AA ΔE 0.056
Use #66DFBC 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.