#66CEBA
Closest named color: Seafoam Blue (#78D1B6). oklch(78.4% 0.102 179.3), rgb(102, 206, 186).
Aa
Black text reads best on this color (11.10:1).
About this color
#66CEBA is a light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.102 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Seafoam Blue (#78D1B6), ΔE 0.019 away. Black text reads best on it, at 11.10:1.
| Hue family | Teals and cyans |
| Lightness | light (78%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Seafoam Blue (#78D1B6) |
| Black text | 11.10:1 |
| White text | 1.89:1 |
Values
| HEX | #66CEBA |
| RGB | rgb(102, 206, 186) |
| HSL | hsl(168, 51%, 60%) |
| OKLCH | oklch(78.4% 0.102 179.3) |
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 #66CEBA | 1.89:1 | Fails | Lc -40.0 | Non-text elements, placeholder text |
| Black text on #66CEBA | 11.10:1 | AAA | Lc 68.1 | Content text, not long reading |
| #66CEBA text on white | 1.89:1 | Fails | Lc 35.7 | Non-text elements, placeholder text |
| #66CEBA text on black | 11.10:1 | AAA | Lc -66.8 | 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
#ECF9F6
oklch(97.2% 0.014 180.7)
-
Step 100
100
#D6F1EA
oklch(93.7% 0.03 178.3)
-
Step 200
200
#B1E6DA
oklch(88.5% 0.057 179.5)
-
Step 300
300 (this color)
#66CEBA
oklch(78.4% 0.102 179.3)
-
Step 400
400
#00BAA2
oklch(70.6% 0.129 179.1)
-
Step 500
500
#00A08B
oklch(63.2% 0.115 179)
-
Step 600
600
#008675
oklch(55.5% 0.101 179.7)
-
Step 700
700
#007162
oklch(49.1% 0.09 179.3)
-
Step 800
800
#005D50
oklch(42.8% 0.078 178.9)
-
Step 900
900
#004D42
oklch(37.6% 0.069 179)
-
Step 950
950
#002E27
oklch(27% 0.049 179.5)
#66CEBA 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) | #C7C4B9 | 0.108 |
| Deuteranopia (no green cones) | #B6B7BC | 0.103 |
| Tritanopia (no blue cones) | #32D1C8 | 0.031 |
| Achromatopsia (no color) | #BCBCBC | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66CEBA
#66CEBA
oklch(78.4% 0.102 179.3)
- #EE9DB7
#EE9DB7
oklch(78.3% 0.101 358.9)
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 #66CEBA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seafoam Blue #78D1B6 ΔE 0.019
- Medium Aquamarine #66CDAA ΔE 0.022
- Pale Teal #82CBB2 ΔE 0.025
- Medium Turquoise #48D1CC ΔE 0.028
- Tiffany Blue #94D2BD ΔE 0.047
- Dark Turquoise #00CED1 ΔE 0.047
- Turquoise #40E0D0 ΔE 0.050
- Emerald #06D6A0 ΔE 0.065
Use #66CEBA 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.