Munsell Yellow
#efcc00
Mellow lemon chartreuse for precise, soft contrast
About Munsell Yellow
On my screen, Munsell Yellow reads like a clean, warm primrose light that feels more present than Egg Toast, but less "workday punch" than Broom. It has a bright, saturated core without drifting fully candy-like, and that balance is what makes it sit confidently in a UI without looking tentative.
Compared with Golden Ticket, it turns up the brightness and the yellow-face value, while holding a clearer, greener-free warmth. Use it for onboarding steps, notification badges, and ecommerce promo labels where you want instant "look here" attention that still feels controlled. I also like it for classroom progress graphics, plant-care brand tiles, and marketing thumbnails that need a single strong highlight over white or light gray.
One quirk: keep an eye on cream backgrounds. Pairing it with a slightly deeper green, olive, or a neutral charcoal border keeps the edge crisp instead of softening into the page.
Code snippets
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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
On Gray 100 #f5f5f5
On Gray 900 #18181b
On Black #000000
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