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💡 Click on any color value below to copy it to clipboard
Running Number
4,250,103
HEX
#40D9F7
RGB
64, 217, 247
HSL
190°,92%,61%
HSV
190°,74%,97%
CMYK
74%,12%,0%,3%
Brightness
68%
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
#40D9F7 sits at 190° on the color wheel, placing it in the cyan family of the cool half of the spectrum. With 92% saturation and 61% lightness, it reads as a fully saturated, light tone — an immediate, signal-grade voice that demands attention. Its RGB mix of 64, 217, 247 produces a 12.49:1 contrast ratio against black, which clears WCAG AAA for body text in that pairing.
In RGB space #40D9F7 is a clear variant of CSS turquoise — about 40 units away from #40E0D0. Designers reach for cyan 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 #40D9F7 in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#40d9f7";💡 Click any tab to see how to use #40d9f7 in different programming languages