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💡 Click on any color value below to copy it to clipboard
Running Number
4,242,203
HEX
#40BB1B
RGB
64, 187, 27
HSL
106°,75%,42%
HSV
106°,86%,73%
CMYK
66%,0%,86%,27%
Brightness
52%
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
#40BB1B sits at 106° on the color wheel, placing it in the green family of the cool half of the spectrum. With 75% saturation and 42% lightness, it reads as a richly saturated, shadowed tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 64, 187, 27 produces a 8.34:1 contrast ratio against black, which clears WCAG AAA for body text in that pairing.
In RGB space #40BB1B is a clear variant of CSS forest green — about 57 units away from #228B22. Designers reach for 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 #40BB1B in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#40bb1b";💡 Click any tab to see how to use #40bb1b in different programming languages