#66CFC8
Closest named color: Medium Turquoise (#48D1CC). oklch(79% 0.098 189.6), rgb(102, 207, 200).
Aa
Black text reads best on this color (11.32:1).
About this color
#66CFC8 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 79%, its chroma 0.098 and its hue 190°. 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 11.32:1.
| Hue family | Teals and cyans |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 11.32:1 |
| White text | 1.85:1 |
Values
| HEX | #66CFC8 |
| RGB | rgb(102, 207, 200) |
| HSL | hsl(176, 52%, 61%) |
| OKLCH | oklch(79% 0.098 189.6) |
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 #66CFC8 | 1.85:1 | Fails | Lc -38.9 | Non-text elements, placeholder text |
| Black text on #66CFC8 | 11.32:1 | AAA | Lc 69.1 | Content text, not long reading |
| #66CFC8 text on white | 1.85:1 | Fails | Lc 34.7 | Non-text elements, placeholder text |
| #66CFC8 text on black | 11.32:1 | AAA | Lc -67.8 | 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
#ECF8F7
oklch(97% 0.013 191)
-
Step 100
100
#D6F0EE
oklch(93.6% 0.027 191.1)
-
Step 200
200
#B0E5E1
oklch(88.4% 0.055 190.5)
-
Step 300
300 (this color)
#66CFC8
oklch(79% 0.098 189.6)
-
Step 400
400
#00B8B1
oklch(70.6% 0.122 190)
-
Step 500
500
#009E98
oklch(63.1% 0.109 190)
-
Step 600
600
#00857F
oklch(55.6% 0.096 189.2)
-
Step 700
700
#00706B
oklch(49.2% 0.085 189.4)
-
Step 800
800
#005C58
oklch(42.8% 0.074 189.6)
-
Step 900
900
#004C49
oklch(37.6% 0.065 190.2)
-
Step 950
950
#002E2B
oklch(27.1% 0.047 188)
#66CFC8 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) | #C5C6C8 | 0.104 |
| Deuteranopia (no green cones) | #B4B9C9 | 0.098 |
| Tritanopia (no blue cones) | #22D4CD | 0.033 |
| Achromatopsia (no color) | #BEBEBE | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66CFC8
#66CFC8
oklch(79% 0.098 189.6)
- #F2A0AD
#F2A0AD
oklch(79% 0.099 9.2)
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 #66CFC8, 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 0.030
- Pale Teal #82CBB2 ΔE 0.034
- Dark Turquoise #00CED1 ΔE 0.040
- Medium Aquamarine #66CDAA ΔE 0.041
- Tiffany Blue #94D2BD ΔE 0.046
- Turquoise #40E0D0 ΔE 0.047
- Aqua Blue #02D8E9 ΔE 0.052
Use #66CFC8 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.