#66CDCC
Closest named color: Medium Turquoise (#48D1CC). oklch(78.7% 0.096 194.5), rgb(102, 205, 204).
Aa
Black text reads best on this color (11.16:1).
About this color
#66CDCC is a light, moderately saturated teal or cyan. In OKLCH its lightness is 79%, its chroma 0.096 and its hue 195°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Turquoise (#48D1CC), ΔE 0.021 away. Black text reads best on it, at 11.16:1.
| Hue family | Teals and cyans |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 11.16:1 |
| White text | 1.88:1 |
Values
| HEX | #66CDCC |
| RGB | rgb(102, 205, 204) |
| HSL | hsl(179, 51%, 60%) |
| OKLCH | oklch(78.7% 0.096 194.5) |
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 #66CDCC | 1.88:1 | Fails | Lc -39.7 | Non-text elements, placeholder text |
| Black text on #66CDCC | 11.16:1 | AAA | Lc 68.4 | Content text, not long reading |
| #66CDCC text on white | 1.88:1 | Fails | Lc 35.4 | Non-text elements, placeholder text |
| #66CDCC text on black | 11.16:1 | AAA | Lc -67.1 | 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
#D6F0EF
oklch(93.6% 0.027 193.9)
-
Step 200
200
#B1E5E4
oklch(88.6% 0.053 194.8)
-
Step 300
300 (this color)
#66CDCC
oklch(78.7% 0.096 194.5)
-
Step 400
400
#00B7B7
oklch(70.6% 0.12 194.8)
-
Step 500
500
#009D9D
oklch(63% 0.108 194.8)
-
Step 600
600
#008484
oklch(55.5% 0.095 194.8)
-
Step 700
700
#006F6F
oklch(49% 0.084 194.8)
-
Step 800
800
#005B5B
oklch(42.7% 0.073 194.8)
-
Step 900
900
#004C4C
oklch(37.7% 0.064 194.8)
-
Step 950
950
#002D2D
oklch(26.9% 0.046 194.8)
#66CDCC 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) | #C2C4CC | 0.101 |
| Deuteranopia (no green cones) | #B0B7CD | 0.094 |
| Tritanopia (no blue cones) | #1DD2CC | 0.036 |
| Achromatopsia (no color) | #BDBDBD | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66CDCC
#66CDCC
oklch(78.7% 0.096 194.5)
- #F0A0A6
#F0A0A6
oklch(78.6% 0.096 14.6)
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 #66CDCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.021
- Seafoam Blue #78D1B6 ΔE 0.038
- Dark Turquoise #00CED1 ΔE 0.039
- Pale Teal #82CBB2 ΔE 0.040
- Medium Aquamarine #66CDAA ΔE 0.049
- Aqua Blue #02D8E9 ΔE 0.050
- Tiffany Blue #94D2BD ΔE 0.051
- Turquoise #40E0D0 ΔE 0.053
Use #66CDCC 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.