Nuclear Acid

#ecf474

Lighter, greener chartreuse for clinical UI contrast

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About Nuclear Acid

I keep seeing Nuclear Acid as that neon-ish lime spill you'd catch on a lab label or a reflective safety stripe, but softened enough to sit in UI without looking like a highlighter tip. Compared to 's almost-milky near-white, this holds its green longer and reads cleaner at a glance. And unlike 's punchy chartreuse glare, Nuclear Acid feels more contained, with a slightly calmer, acidic edge.

Use it when you need light, alert-adjacent emphasis in dashboards and logistics interfaces that track lots of small state changes, like step progress and filter confirmations. It also works well for green-tinted progress banners in media admin panels, where you want "active" to show up fast without turning the whole layout yellow. I like it on pill highlights, active chips, and selected segments over very pale neutrals.

Quirk: because it's lighter and more saturated than 's "almost-neutral," pair it with a deeper green or a cool gray border so edges don't blur into the background. It's the one I reach for when green needs to feel sharp but not shouty.

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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

Aa
1.18:1Fail

On Gray 100 #f5f5f5

Aa
1.08:1Fail

On Gray 900 #18181b

Aa
14.98:1AAA

On Black #000000

Aa
17.76:1AAA

Variations

Shades

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Tints

Lighter variations, created by mixing toward white.

Tones

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Hues

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Temperatures

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Color harmonies

Complementary
Analogous
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Tetradic

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Similar colors

#f5f171
#f6f677
#faee66

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