Bright Green
An aggressive high-voltage neon lime green
This electric, high-saturation lime is aggressive and demands immediate attention. Due to its intensity, #66ff00 works best as a sharp 10% accent color rather than a primary background shade. It pairs surprisingly well with deep charcoal grays for a modern tech aesthetic. Because black text offers excellent readability against this hex code, it remains a smart choice for bold, high-contrast call-to-action buttons.
Questions about Bright Green
What is the hex code for Bright Green?
Bright Green is #66ff00. In RGB that is rgb(102, 255, 0), in HSL hsl(96, 100%, 50%) and in CMYK 60%, 0%, 100%, 0%.
Why is #66ff00 so difficult to use as a primary background color?
This neon lime is extremely aggressive and quickly causes eye fatigue when applied to large areas. It works most effectively as a strategic 10% accent to highlight specific elements like call-to-action buttons or status indicators rather than filling an entire interface.
What colors pair best with the intensity of #66ff00?
To ground this high-energy shade, pair it with deep, neutral tones like charcoal or matte black. These dark, muted colors create a sophisticated tech-forward aesthetic that allows the brightness of #66ff00 to stand out without overwhelming the viewer.
Is Bright Green readable on white or black?
Bright Green has a 1.32:1 contrast ratio on white and 15.86:1 on black. WCAG asks for 4.5:1 for body text and 3:1 for large text, so on white it is too faint for text and on black it works for body text. Try other pairs in the contrast checker.