#66CDCD
Closest named color: Medium Turquoise (#48D1CC). oklch(78.7% 0.096 195.4), rgb(102, 205, 205).
Aa
Black text reads best on this color (11.17:1).
About this color
#66CDCD 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 0.022 away. Black text reads best on it, at 11.17:1.
| Hue family | Teals and cyans |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 11.17:1 |
| White text | 1.87:1 |
Values
| HEX | #66CDCD |
| RGB | rgb(102, 205, 205) |
| HSL | hsl(180, 51%, 60%) |
| OKLCH | oklch(78.7% 0.096 195.4) |
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 #66CDCD | 1.87:1 | Fails | Lc -39.6 | Non-text elements, placeholder text |
| Black text on #66CDCD | 11.17:1 | AAA | Lc 68.5 | Content text, not long reading |
| #66CDCD text on white | 1.87:1 | Fails | Lc 35.4 | Non-text elements, placeholder text |
| #66CDCD text on black | 11.17:1 | 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
#D6F0F0
oklch(93.6% 0.027 196.7)
-
Step 200
200
#B1E5E4
oklch(88.6% 0.053 194.8)
-
Step 300
300 (this color)
#66CDCD
oklch(78.7% 0.096 195.4)
-
Step 400
400
#00B7B8
oklch(70.6% 0.12 195.5)
-
Step 500
500
#009D9E
oklch(63.1% 0.108 195.6)
-
Step 600
600
#008485
oklch(55.6% 0.095 195.7)
-
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
#004C4C
oklch(37.7% 0.064 194.8)
-
Step 950
950
#002D2D
oklch(26.9% 0.046 194.8)
#66CDCD 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) | #C2C5CD | 0.100 |
| Deuteranopia (no green cones) | #B0B8CE | 0.093 |
| Tritanopia (no blue cones) | #1BD3CD | 0.037 |
| Achromatopsia (no color) | #BDBDBD | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66CDCD
#66CDCD
oklch(78.7% 0.096 195.4)
- #F1A0A5
#F1A0A5
oklch(78.7% 0.097 15.5)
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 #66CDCD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.022
- Dark Turquoise #00CED1 ΔE 0.039
- Seafoam Blue #78D1B6 ΔE 0.040
- Pale Teal #82CBB2 ΔE 0.041
- Aqua Blue #02D8E9 ΔE 0.049
- Medium Aquamarine #66CDAA ΔE 0.050
- Tiffany Blue #94D2BD ΔE 0.051
- Turquoise #40E0D0 ΔE 0.053
Use #66CDCD 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.