#66F9F2
Closest named color: Bright Cyan (#41FDFE). oklch(90.1% 0.126 190.8), rgb(102, 249, 242).
Aa
Black text reads best on this color (16.39:1).
About this color
#66F9F2 is a very light, moderately saturated teal or cyan. In OKLCH its lightness is 90%, its chroma 0.126 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Cyan (#41FDFE), ΔE 0.021 away. Black text reads best on it, at 16.39:1.
| Hue family | Teals and cyans |
| Lightness | very light (90%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Bright Cyan (#41FDFE) |
| Black text | 16.39:1 |
| White text | 1.28:1 |
Values
| HEX | #66F9F2 |
| RGB | rgb(102, 249, 242) |
| HSL | hsl(177, 92%, 69%) |
| OKLCH | oklch(90.1% 0.126 190.8) |
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 #66F9F2 | 1.28:1 | Fails | Lc -15.7 | Dividers and decoration only |
| Black text on #66F9F2 | 16.39:1 | AAA | Lc 90.0 | Fine for body text |
| #66F9F2 text on white | 1.28:1 | Fails | Lc 13.6 | Not readable |
| #66F9F2 text on black | 16.39:1 | AAA | Lc -90.3 | 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
#E6FAF9
oklch(97% 0.021 193.2)
-
Step 100
100
#C7F4F1
oklch(93.5% 0.046 191.4)
-
Step 200
200 (this color)
#66F9F2
oklch(90.1% 0.126 190.8)
-
Step 300
300
#00DDD6
oklch(81% 0.14 190.7)
-
Step 400
400
#00B8B2
oklch(70.6% 0.122 190.6)
-
Step 500
500
#009E99
oklch(63.1% 0.109 190.8)
-
Step 600
600
#008580
oklch(55.7% 0.096 190.1)
-
Step 700
700
#00706C
oklch(49.2% 0.085 190.4)
-
Step 800
800
#005B58
oklch(42.5% 0.073 190.9)
-
Step 900
900
#004C4A
oklch(37.6% 0.065 191.7)
-
Step 950
950
#002D2C
oklch(26.9% 0.046 192.5)
#66F9F2 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) | #ECEDF2 | 0.133 |
| Deuteranopia (no green cones) | #D4DCF3 | 0.124 |
| Tritanopia (no blue cones) | #00FFF6 | 0.030 |
| Achromatopsia (no color) | #E3E3E3 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66F9F2
#66F9F2
oklch(90.1% 0.126 190.8)
- #FFD1D6
#FFD1D6
oklch(90.2% 0.052 10.8)
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 #66F9F2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Cyan #41FDFE ΔE 0.021
- Bright Turquoise #0FFEF9 ΔE 0.028
- Bright Light Blue #26F7FD ΔE 0.030
- Cyan #00FFFF ΔE 0.031
- Bright Aqua #0BF9EA ΔE 0.034
- Robin's Egg #6DEDFD ΔE 0.041
- Robin Egg Blue #8AF1FE ΔE 0.041
- Light Aqua #8CFFDB ΔE 0.047
Use #66F9F2 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.