#66CFCB
Closest named color: Medium Turquoise (#48D1CC). oklch(79.1% 0.098 192), rgb(102, 207, 203).
Aa
Black text reads best on this color (11.35:1).
About this color
#66CFCB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 79%, its chroma 0.098 and its hue 192°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Turquoise (#48D1CC), ΔE 0.019 away. Black text reads best on it, at 11.35:1.
| Hue family | Teals and cyans |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 11.35:1 |
| White text | 1.84:1 |
Values
| HEX | #66CFCB |
| RGB | rgb(102, 207, 203) |
| HSL | hsl(178, 52%, 61%) |
| OKLCH | oklch(79.1% 0.098 192) |
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 #66CFCB | 1.84:1 | Fails | Lc -38.8 | Non-text elements, placeholder text |
| Black text on #66CFCB | 11.35:1 | AAA | Lc 69.3 | Content text, not long reading |
| #66CFCB text on white | 1.84:1 | Fails | Lc 34.6 | Non-text elements, placeholder text |
| #66CFCB text on black | 11.35:1 | AAA | Lc -68.0 | 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
#D5F0EF
oklch(93.5% 0.028 194)
-
Step 200
200
#B0E5E2
oklch(88.5% 0.054 191.9)
-
Step 300
300 (this color)
#66CFCB
oklch(79.1% 0.098 192)
-
Step 400
400
#00B8B4
oklch(70.7% 0.121 192)
-
Step 500
500
#009E9A
oklch(63.2% 0.109 191.6)
-
Step 600
600
#008582
oklch(55.7% 0.096 192)
-
Step 700
700
#006F6D
oklch(49% 0.084 192.6)
-
Step 800
800
#005B59
oklch(42.6% 0.073 192.2)
-
Step 900
900
#004C4A
oklch(37.6% 0.065 191.7)
-
Step 950
950
#002D2C
oklch(26.9% 0.046 192.5)
#66CFCB 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) | #C4C6CB | 0.102 |
| Deuteranopia (no green cones) | #B3B9CC | 0.097 |
| Tritanopia (no blue cones) | #1DD4CD | 0.035 |
| Achromatopsia (no color) | #BEBEBE | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66CFCB
#66CFCB
oklch(79.1% 0.098 192)
- #F2A1AA
#F2A1AA
oklch(79.1% 0.097 12.2)
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 #66CFCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.019
- Seafoam Blue #78D1B6 ΔE 0.034
- Pale Teal #82CBB2 ΔE 0.037
- Dark Turquoise #00CED1 ΔE 0.040
- Medium Aquamarine #66CDAA ΔE 0.046
- Tiffany Blue #94D2BD ΔE 0.047
- Turquoise #40E0D0 ΔE 0.047
- Aqua Blue #02D8E9 ΔE 0.049
Use #66CFCB 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.