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Running Number
6,746,563
HEX
#66F1C3
RGB
102, 241, 195
HSL
160°,83%,67%
HSV
160°,58%,95%
CMYK
58%,0%,19%,5%
Brightness
76%
Type
Light
AA Normal Text: ≥ 4.5:1
AA Large Text: ≥ 3.0:1
AAA Normal Text: ≥ 7.0:1
AAA Large Text: ≥ 4.5:1
#66F1C3 sits at 160° on the color wheel, placing it in the spring green family of the cool half of the spectrum. With 83% saturation and 67% lightness, it reads as a richly saturated, light tone — an immediate, signal-grade voice that demands attention. Its RGB mix of 102, 241, 195 produces a 14.94:1 contrast ratio against black, which clears WCAG AAA for body text in that pairing.
In RGB space #66F1C3 is a clear variant of CSS turquoise — about 44 units away from #40E0D0. Designers reach for spring green hues at this saturation when the brief calls for bold, immediate signal, and at this lightness when they want a present, comfortable mid-canvas voice. On screen the cool cast tends to pair best with warm neutrals in the 25°-45° range to add life.
See how this color appears in real UI elements
Button (filled)
Badge
Progress Bar
Link Hover
Input Focus Ring
Checkbox Active
Toggle Switch On
Slider Thumb
Card Border
Icon Highlight
Tooltip Background
Modal Header
Tab Active
Alert Box
Timeline Dot
Loading Spinner
Dropdown Selected
Table Row Highlight
Calendar Date
Mobile Device
See how to use #66F1C3 in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#66f1c3";💡 Click any tab to see how to use #66f1c3 in different programming languages