#66DCB6
Closest named color: Seafoam Blue (#78D1B6). oklch(81.6% 0.121 169.5), rgb(102, 220, 182).
Aa
Black text reads best on this color (12.47:1).
About this color
#66DCB6 is a light, moderately saturated green. In OKLCH its lightness is 82%, its chroma 0.121 and its hue 169°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seafoam Blue (#78D1B6), ΔE 0.032 away. Black text reads best on it, at 12.47:1.
| Hue family | Greens |
| Lightness | light (82%) |
| Chroma | moderately saturated (0.121) |
| Temperature | in between |
| Nearest name | Seafoam Blue (#78D1B6) |
| Black text | 12.47:1 |
| White text | 1.68:1 |
Values
| HEX | #66DCB6 |
| RGB | rgb(102, 220, 182) |
| HSL | hsl(161, 63%, 63%) |
| OKLCH | oklch(81.6% 0.121 169.5) |
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 #66DCB6 | 1.68:1 | Fails | Lc -33.3 | Non-text elements, placeholder text |
| Black text on #66DCB6 | 12.47:1 | AAA | Lc 74.2 | Content text, not long reading |
| #66DCB6 text on white | 1.68:1 | Fails | Lc 29.6 | Dividers and decoration only |
| #66DCB6 text on black | 12.47:1 | AAA | Lc -73.2 | 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
#ECF9F4
oklch(97.1% 0.015 171.1)
-
Step 100
100
#D4F2E6
oklch(93.6% 0.035 169.5)
-
Step 200
200
#ADE8D2
oklch(88.5% 0.067 169.8)
-
Step 300
300 (this color)
#66DCB6
oklch(81.6% 0.121 169.5)
-
Step 400
400
#00BC92
oklch(70.7% 0.141 169.4)
-
Step 500
500
#00A17D
oklch(63% 0.125 169.6)
-
Step 600
600
#008869
oklch(55.7% 0.111 169.5)
-
Step 700
700
#007258
oklch(49.1% 0.097 169.9)
-
Step 800
800
#005E47
oklch(42.8% 0.086 168.9)
-
Step 900
900
#004E3B
oklch(37.7% 0.075 169.6)
-
Step 950
950
#002F22
oklch(27.1% 0.054 168.9)
#66DCB6 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) | #D7CFB4 | 0.124 |
| Deuteranopia (no green cones) | #C5C2B9 | 0.119 |
| Tritanopia (no blue cones) | #2FDDD1 | 0.042 |
| Achromatopsia (no color) | #C7C7C7 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66DCB6
#66DCB6
oklch(81.6% 0.121 169.5)
- #FEA2CE
#FEA2CE
oklch(81.7% 0.121 350)
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 #66DCB6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seafoam Blue #78D1B6 ΔE 0.032
- Turquoise #40E0D0 ΔE 0.036
- Aqua Marine #2EE8BB ΔE 0.038
- Medium Aquamarine #66CDAA ΔE 0.041
- Light Teal #90E4C1 ΔE 0.047
- Pale Teal #82CBB2 ΔE 0.049
- Tiffany Blue #94D2BD ΔE 0.051
- Medium Turquoise #48D1CC ΔE 0.054
Use #66DCB6 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.