#40EFF1 Hex Color
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This highly saturated cyan is electric and intense, functioning best as an accent rather than a full background. The hex code #40eff1 carries a sharp, artificial chill that demands attention in technology or UI branding. Because black text maintains excellent readability against this bright tone, it creates high-impact contrast for iconography and calls-to-action that need to pop against darker, more muted color palettes.
Questions about #40eff1
What is #40eff1 in RGB, HSL and CMYK?
In RGB, #40eff1 is rgb(64, 239, 241), in HSL hsl(181, 86%, 60%) and in CMYK 73%, 1%, 0%, 5%.
Where should I use #40eff1 in a design project?
Use #40eff1 sparingly as a high-impact accent for calls-to-action, status indicators, or small iconography. It is too intense for large backgrounds but excels at creating visual tension when paired with dark, neutral tones like charcoal or deep navy.
Is #40eff1 readable on white or black?
#40eff1 has a 1.41:1 contrast ratio on white and 14.83:1 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.