#21DFE4 Hex Color
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This electric cyan is highly saturated and glows with a sharp, artificial intensity. Because #21dfe4 is so vivid, it works best as a 10% accent rather than a dominant background color. It pairs surprisingly well with dark charcoal or deep navy, which grounds its aggressive coolness. Accessibility is straightforward here, as it offers excellent contrast when paired with black text for small, readable UI elements.
Questions about #21dfe4
What is #21dfe4 in RGB, HSL and CMYK?
In RGB, #21dfe4 is rgb(33, 223, 228), in HSL hsl(182, 78%, 51%) and in CMYK 86%, 2%, 0%, 11%.
How can I use #21dfe4 effectively in a design without it becoming overwhelming?
Treat #21dfe4 as a high-impact accent color, using it for no more than 10% of your total layout. It works exceptionally well when paired against charcoal or deep navy backgrounds to ground its aggressive and artificial intensity.
Is #21dfe4 readable on white or black?
#21dfe4 has a 1.64:1 contrast ratio on white and 12.74:1 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.