#66DFDD
Closest named color: Turquoise (#40E0D0). oklch(83.4% 0.108 193.8), rgb(102, 223, 221).
Aa
Black text reads best on this color (13.16:1).
About this color
#66DFDD is a light, moderately saturated teal or cyan. In OKLCH its lightness is 83%, its chroma 0.108 and its hue 194°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.031 away. Black text reads best on it, at 13.16:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 13.16:1 |
| White text | 1.59:1 |
Values
| HEX | #66DFDD |
| RGB | rgb(102, 223, 221) |
| HSL | hsl(179, 65%, 64%) |
| OKLCH | oklch(83.4% 0.108 193.8) |
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 #66DFDD | 1.59:1 | Fails | Lc -30.1 | Non-text elements, placeholder text |
| Black text on #66DFDD | 13.16:1 | AAA | Lc 77.1 | Fine for body text |
| #66DFDD text on white | 1.59:1 | Fails | Lc 26.7 | Dividers and decoration only |
| #66DFDD text on black | 13.16:1 | AAA | Lc -76.3 | Fine for body text |
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
#EBF9F8
oklch(97.1% 0.015 191.8)
-
Step 100
100
#D3F1F0
oklch(93.6% 0.031 194.2)
-
Step 200
200
#ABE6E4
oklch(88.4% 0.06 193.5)
-
Step 300
300 (this color)
#66DFDD
oklch(83.4% 0.108 193.8)
-
Step 400
400
#00B8B6
oklch(70.8% 0.121 193.4)
-
Step 500
500
#009D9C
oklch(63% 0.108 194)
-
Step 600
600
#008483
oklch(55.5% 0.095 193.8)
-
Step 700
700
#006F6E
oklch(49% 0.084 193.7)
-
Step 800
800
#005B5A
oklch(42.6% 0.073 193.5)
-
Step 900
900
#004C4B
oklch(37.7% 0.064 193.2)
-
Step 950
950
#002D2D
oklch(26.9% 0.046 194.8)
#66DFDD 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) | #D3D5DD | 0.114 |
| Deuteranopia (no green cones) | #BFC6DE | 0.107 |
| Tritanopia (no blue cones) | #00E5DE | 0.036 |
| Achromatopsia (no color) | #CDCDCD | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66DFDD
#66DFDD
oklch(83.4% 0.108 193.8)
- #FFB0B7
#FFB0B7
oklch(83.4% 0.093 13.4)
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 #66DFDD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.031
- Aqua Blue #02D8E9 ΔE 0.048
- Medium Turquoise #48D1CC ΔE 0.048
- Robin's Egg #6DEDFD ΔE 0.052
- Tiffany Blue #94D2BD ΔE 0.054
- Light Teal #90E4C1 ΔE 0.055
- Seafoam Blue #78D1B6 ΔE 0.055
- Celeste #A8DADC ΔE 0.060
Use #66DFDD 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.