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Running Number
3,837,783
HEX
#3A8F57
RGB
58, 143, 87
HSL
140°,42%,39%
HSV
140°,59%,56%
CMYK
59%,0%,39%,44%
Brightness
44%
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
#3A8F57 sits at 140° on the color wheel, placing it in the spring green family of the cool half of the spectrum. With 42% saturation and 39% lightness, it reads as a moderately saturated, shadowed tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 58, 143, 87 produces a 5.25:1 contrast ratio against black, which clears WCAG AA for body text in that pairing.
In RGB space #3A8F57 is a close cousin of CSS sea green — about 13 units away from #2E8B57. Designers reach for spring green hues at this saturation when the brief calls for a conversational, mid-energy register, 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 #3A8F57 in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#3a8f57";💡 Click any tab to see how to use #3a8f57 in different programming languages