Atomic Lime
#b9ff03
Neon-lime contrast for atomic callouts, not soft cream
About Atomic Lime
This one doesn't announce itself like Banana Bandanna does, and it doesn't rely on context the way Crash Dummy does. Atomic Lime sits at that rare intersection where saturation and lightness peak together, it's got the punch of true neon but lands softer, almost electric without the aggression. On screen it reads as pure signal, the kind of green that actually feels alive instead of just bright.
You'll reach for it in live-event dashboards, real-time alerts, and notification badges where motion and energy matter. Trading platforms use it for gainers. Navigation apps layer it into active routes. It works especially well on dark interfaces because the green undertone keeps it from feeling yellow-warm; there's a coolness in there that reads as technical, present, intentional. It's the green you pick when you need something to feel active without feeling like a warning.
The trade-off is real though. Pair it with medium grays or muted backgrounds and it'll feel out of place, almost wrong. It wants either deep darks or clean white, somewhere it can breathe. Oversaturate your whole layout with it and you'll lose the impact fast.
Code snippets
Copy this color into your project.
Contrast checker
WCAG 2.1 contrast ratios. AA requires 4.5:1 for normal text, 3:1 for large. AAA requires 7:1 / 4.5:1.
On White #ffffff
On Gray 100 #f5f5f5
On Gray 900 #18181b
On Black #000000
Variations
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