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Running Number
5,371,593
HEX
#51F6C9
RGB
81, 246, 201
HSL
164°,90%,64%
HSV
164°,67%,96%
CMYK
67%,0%,18%,4%
Brightness
75%
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
#51F6C9 sits at 164° on the color wheel, placing it in the spring green family of the cool half of the spectrum. With 90% saturation and 64% lightness, it reads as a fully saturated, light tone — an immediate, signal-grade voice that demands attention. Its RGB mix of 81, 246, 201 produces a 15.38:1 contrast ratio against black, which clears WCAG AAA for body text in that pairing.
In RGB space #51F6C9 is a clear variant of CSS turquoise — about 29 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 #51F6C9 in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#51f6c9";💡 Click any tab to see how to use #51f6c9 in different programming languages