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Running Number
6,731,281
HEX
#66B611
RGB
102, 182, 17
HSL
89°,83%,39%
HSV
89°,91%,71%
CMYK
44%,0%,91%,29%
Brightness
55%
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
#66B611 sits at 89° on the color wheel, placing it in the chartreuse family of the neutral half of the spectrum. With 83% saturation and 39% lightness, it reads as a richly saturated, shadowed tone — an immediate, signal-grade voice that demands attention. Its RGB mix of 102, 182, 17 produces a 8.26:1 contrast ratio against black, which clears WCAG AAA for body text in that pairing.
In RGB space #66B611 is a clear variant of CSS olive drab — about 44 units away from #6B8E23. Designers reach for chartreuse 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 balanced cast tends to pair best with either warm or cool accents depending on the surrounding palette.
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 #66B611 in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#66b611";💡 Click any tab to see how to use #66b611 in different programming languages