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💡 Click on any color value below to copy it to clipboard
Running Number
4,157,265
HEX
#3F6F51
RGB
63, 111, 81
HSL
143°,28%,34%
HSV
143°,43%,44%
CMYK
43%,0%,27%,56%
Brightness
37%
Type
Dark
AA Normal Text: ≥ 4.5:1
AA Large Text: ≥ 3.0:1
AAA Normal Text: ≥ 7.0:1
AAA Large Text: ≥ 4.5:1
#3F6F51 sits at 143° on the color wheel, placing it in the spring green family of the cool half of the spectrum. With 28% saturation and 34% lightness, it reads as a softly muted, shadowed tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 63, 111, 81 produces a 5.83:1 contrast ratio against white, which clears WCAG AA for body text in that pairing.
In RGB space #3F6F51 is a clear variant of CSS sea green — about 33 units away from #2E8B57. Designers reach for spring green hues at this saturation when the brief calls for restraint and atmosphere, 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 #3F6F51 in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#3f6f51";💡 Click any tab to see how to use #3f6f51 in different programming languages