#66FFE0
Closest named color: Aquamarine (#7FFFD4). oklch(91% 0.137 177.3), rgb(102, 255, 224).
Aa
Black text reads best on this color (16.94:1).
About this color
#66FFE0 is a very light, moderately saturated teal or cyan. In OKLCH its lightness is 91%, its chroma 0.137 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Aquamarine (#7FFFD4), ΔE 0.021 away. Black text reads best on it, at 16.94:1.
| Hue family | Teals and cyans |
| Lightness | very light (91%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Aquamarine (#7FFFD4) |
| Black text | 16.94:1 |
| White text | 1.23:1 |
Values
| HEX | #66FFE0 |
| RGB | rgb(102, 255, 224) |
| HSL | hsl(168, 100%, 70%) |
| OKLCH | oklch(91% 0.137 177.3) |
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 #66FFE0 | 1.23:1 | Fails | Lc -13.4 | Not readable |
| Black text on #66FFE0 | 16.94:1 | AAA | Lc 92.1 | Preferred for body text |
| #66FFE0 text on white | 1.23:1 | Fails | Lc 11.5 | Not readable |
| #66FFE0 text on black | 16.94:1 | AAA | Lc -92.5 | Preferred 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 200.
-
Step 50
50
#E6FBF5
oklch(97.1% 0.023 176.9)
-
Step 100
100
#C7F6E9
oklch(93.7% 0.051 176.5)
-
Step 200
200 (this color)
#66FFE0
oklch(91% 0.137 177.3)
-
Step 300
300
#00DFBF
oklch(80.8% 0.15 177.3)
-
Step 400
400
#00BB9F
oklch(70.8% 0.132 176.8)
-
Step 500
500
#00A088
oklch(63.1% 0.117 177)
-
Step 600
600
#008772
oklch(55.7% 0.104 176.6)
-
Step 700
700
#007160
oklch(49.1% 0.091 177.4)
-
Step 800
800
#005D4E
oklch(42.8% 0.079 176.7)
-
Step 900
900
#004D41
oklch(37.6% 0.069 177.7)
-
Step 950
950
#002E26
oklch(26.9% 0.05 177.5)
#66FFE0 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) | #F6F0DF | 0.145 |
| Deuteranopia (no green cones) | #DFE0E2 | 0.137 |
| Tritanopia (no blue cones) | #00FFF6 | 0.038 |
| Achromatopsia (no color) | #E7E7E7 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66FFE0
#66FFE0
oklch(91% 0.137 177.3)
- #FFD4E1
#FFD4E1
oklch(91% 0.051 358.1)
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 #66FFE0, closest first.
No curated palette has a color within ΔE 0.04 of #66FFE0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aquamarine #7FFFD4 ΔE 0.021
- Light Aqua #8CFFDB ΔE 0.027
- Light Aquamarine #7BFDC7 ΔE 0.032
- Light Turquoise #7EF4CC ΔE 0.033
- Bright Aqua #0BF9EA ΔE 0.039
- Bright Turquoise #0FFEF9 ΔE 0.042
- Bright Cyan #41FDFE ΔE 0.045
- Cyan #00FFFF ΔE 0.048
Use #66FFE0 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.