#66C7CD
Closest named color: Medium Turquoise (#48D1CC). oklch(77.3% 0.092 200.8), rgb(102, 199, 205).
Aa
Black text reads best on this color (10.61:1).
About this color
#66C7CD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 77%, its chroma 0.092 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Turquoise (#48D1CC), ΔE 0.033 away. Black text reads best on it, at 10.61:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 10.61:1 |
| White text | 1.97:1 |
Values
| HEX | #66C7CD |
| RGB | rgb(102, 199, 205) |
| HSL | hsl(183, 51%, 60%) |
| OKLCH | oklch(77.3% 0.092 200.8) |
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 #66C7CD | 1.97:1 | Fails | Lc -42.4 | Non-text elements, placeholder text |
| Black text on #66C7CD | 10.61:1 | AAA | Lc 65.9 | Content text, not long reading |
| #66C7CD text on white | 1.97:1 | Fails | Lc 38.0 | Non-text elements, placeholder text |
| #66C7CD text on black | 10.61:1 | AAA | Lc -64.4 | 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
#EDF8F9
oklch(97.1% 0.012 203.5)
-
Step 100
100
#D6F0F1
oklch(93.7% 0.027 199.5)
-
Step 200
200
#B2E4E7
oklch(88.5% 0.052 200.8)
-
Step 300
300 (this color)
#66C7CD
oklch(77.3% 0.092 200.8)
-
Step 400
400
#00B6BF
oklch(70.6% 0.12 201.1)
-
Step 500
500
#009CA4
oklch(63% 0.107 201.2)
-
Step 600
600
#00838A
oklch(55.5% 0.094 201.4)
-
Step 700
700
#006E74
oklch(49% 0.083 201.4)
-
Step 800
800
#005B5F
oklch(42.8% 0.073 200)
-
Step 900
900
#004B4F
oklch(37.5% 0.064 200.9)
-
Step 950
950
#002D30
oklch(27% 0.046 201.8)
#66C7CD 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) | #BBC0CE | 0.093 |
| Deuteranopia (no green cones) | #AAB3CE | 0.087 |
| Tritanopia (no blue cones) | #1FCDC9 | 0.040 |
| Achromatopsia (no color) | #B8B8B8 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66C7CD
#66C7CD
oklch(77.3% 0.092 200.8)
- #EA9E9C
#EA9E9C
oklch(77.3% 0.091 21)
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 #66C7CD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.033
- Dark Turquoise #00CED1 ΔE 0.040
- Pale Teal #82CBB2 ΔE 0.048
- Vivid Sky Blue #4CC9F0 ΔE 0.050
- Seafoam Blue #78D1B6 ΔE 0.052
- Aqua Blue #02D8E9 ΔE 0.056
- Sky Blue #87CEEB ΔE 0.057
- Light Cornflower Blue #98C1D9 ΔE 0.057
Use #66C7CD 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.