Mortal Yellow
#dead00
Brighter chartreuse-yellow for high-contrast green layouts
About Mortal Yellow
On my screen, Mortal Yellow looks like a chalky yellow-green sticker that's been left in the sun a little too long. It's not the heavy warning-stamp weight of Deadly Mustard, and it's not the clean, honeyed lift of Honeycomb. Instead, it comes off bright but slightly dusty, with a green-leaning undertone that keeps it feeling earthy, not butter-gold.
Design-wise, this is the shade I grab when a green UI needs a yellow accent that still reads "in-family" and stays legible on real product imagery. It works well for CPG label callouts, warehouse scan states in inventory dashboards, and the small attention targets you want in dashboards and finance apps without tipping into metallic gold. Compared to Gold Tooth, Mortal Yellow is lighter and less saturated, so it doesn't feel fluorescent or deli-counter shiny.
Quirk: because it has that green-tinted warmth, it can get a little flat beside very crisp creams. If it dulls out, pair it with cleaner whites or a deeper green anchor so it doesn't blend into the background.
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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Lighter variations, created by mixing toward white.
Tones
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Temperatures
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