#66CBCC
Closest named color: Medium Turquoise (#48D1CC). oklch(78.2% 0.094 196.3), rgb(102, 203, 204).
Aa
Black text reads best on this color (10.97:1).
About this color
#66CBCC is a light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.094 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Turquoise (#48D1CC), ΔE 0.024 away. Black text reads best on it, at 10.97:1.
| Hue family | Teals and cyans |
| Lightness | light (78%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 10.97:1 |
| White text | 1.91:1 |
Values
| HEX | #66CBCC |
| RGB | rgb(102, 203, 204) |
| HSL | hsl(181, 50%, 60%) |
| OKLCH | oklch(78.2% 0.094 196.3) |
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 #66CBCC | 1.91:1 | Fails | Lc -40.6 | Non-text elements, placeholder text |
| Black text on #66CBCC | 10.97:1 | AAA | Lc 67.6 | Content text, not long reading |
| #66CBCC text on white | 1.91:1 | Fails | Lc 36.3 | Non-text elements, placeholder text |
| #66CBCC text on black | 10.97:1 | AAA | Lc -66.2 | 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
#ECF8F8
oklch(97% 0.013 196.9)
-
Step 100
100
#D6F0F0
oklch(93.6% 0.027 196.7)
-
Step 200
200
#B1E4E4
oklch(88.4% 0.052 196.2)
-
Step 300
300 (this color)
#66CBCC
oklch(78.2% 0.094 196.3)
-
Step 400
400
#00B7B9
oklch(70.6% 0.12 196.2)
-
Step 500
500
#009D9F
oklch(63.1% 0.107 196.4)
-
Step 600
600
#008486
oklch(55.6% 0.095 196.7)
-
Step 700
700
#006F70
oklch(49.1% 0.084 195.9)
-
Step 800
800
#005B5C
oklch(42.7% 0.073 196.1)
-
Step 900
900
#004C4D
oklch(37.8% 0.064 196.3)
-
Step 950
950
#002D2E
oklch(27% 0.046 197.1)
#66CBCC 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) | #C0C3CC | 0.098 |
| Deuteranopia (no green cones) | #AEB6CD | 0.091 |
| Tritanopia (no blue cones) | #1ED1CB | 0.037 |
| Achromatopsia (no color) | #BBBBBB | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66CBCC
#66CBCC
oklch(78.2% 0.094 196.3)
- #EE9FA3
#EE9FA3
oklch(78.1% 0.095 16.1)
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 #66CBCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.024
- Dark Turquoise #00CED1 ΔE 0.038
- Pale Teal #82CBB2 ΔE 0.041
- Seafoam Blue #78D1B6 ΔE 0.042
- Medium Aquamarine #66CDAA ΔE 0.051
- Aqua Blue #02D8E9 ΔE 0.051
- Tiffany Blue #94D2BD ΔE 0.054
- Vivid Sky Blue #4CC9F0 ΔE 0.055
Use #66CBCC 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.