#66CED5
Closest named color: Medium Turquoise (#48D1CC). oklch(79.2% 0.097 201.3), rgb(102, 206, 213).
Aa
Black text reads best on this color (11.35:1).
About this color
#66CED5 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 79%, its chroma 0.097 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Turquoise (#48D1CC), ΔE 0.027 away. Black text reads best on it, at 11.35:1.
| Hue family | Teals and cyans |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 11.35:1 |
| White text | 1.84:1 |
Values
| HEX | #66CED5 |
| RGB | rgb(102, 206, 213) |
| HSL | hsl(184, 57%, 62%) |
| OKLCH | oklch(79.2% 0.097 201.3) |
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 #66CED5 | 1.84:1 | Fails | Lc -38.7 | Non-text elements, placeholder text |
| Black text on #66CED5 | 11.35:1 | AAA | Lc 69.3 | Content text, not long reading |
| #66CED5 text on white | 1.84:1 | Fails | Lc 34.6 | Non-text elements, placeholder text |
| #66CED5 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
#ECF8F9
oklch(97% 0.013 202.9)
-
Step 100
100
#D5F0F2
oklch(93.6% 0.028 202.1)
-
Step 200
200
#B0E4E8
oklch(88.4% 0.054 202.1)
-
Step 300
300 (this color)
#66CED5
oklch(79.2% 0.097 201.3)
-
Step 400
400
#00B6C0
oklch(70.7% 0.12 201.8)
-
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
#005A5F
oklch(42.5% 0.072 201.4)
-
Step 900
900
#004B50
oklch(37.6% 0.064 202.5)
-
Step 950
950
#002D30
oklch(27% 0.046 201.8)
#66CED5 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) | #C1C6D6 | 0.098 |
| Deuteranopia (no green cones) | #AFB9D6 | 0.091 |
| Tritanopia (no blue cones) | #02D5D0 | 0.043 |
| Achromatopsia (no color) | #BEBEBE | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66CED5
#66CED5
oklch(79.2% 0.097 201.3)
- #F3A2A0
#F3A2A0
oklch(79.1% 0.097 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 #66CED5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.027
- Dark Turquoise #00CED1 ΔE 0.041
- Aqua Blue #02D8E9 ΔE 0.043
- Sky Blue #87CEEB ΔE 0.046
- Vivid Sky Blue #4CC9F0 ΔE 0.048
- Seafoam Blue #78D1B6 ΔE 0.048
- Pale Teal #82CBB2 ΔE 0.050
- Turquoise #40E0D0 ΔE 0.055
Use #66CED5 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.