#EFEF23 Hex Color
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Highly saturated and warm, #efef23 is a luminous yellow that adds urgency to sale graphics, budget branding, and construction signage. Its bright finish suggests enthusiasm and opportunity, with spontaneous energy suited to bold campaigns. Use it as a small accent against charcoal or navy rather than a full background. The hex code #efef23 provides excellent contrast for black text.
Questions about #efef23
What is #efef23 in RGB, HSL and CMYK?
In RGB, #efef23 is rgb(239, 239, 35), in HSL hsl(60, 86%, 54%) and in CMYK 0%, 0%, 85%, 6%.
What colors pair well with #efef23?
Is #efef23 a warm or cool yellow?
#efef23 reads as a warm yellow because its vivid base creates a golden, energetic impression rather than a greenish, lemon-cool one; that warmth suits urgent calls to action, playful campaigns, and high-visibility accents.
Is #efef23 readable on white or black?
#efef23 has a 1.23:1 contrast ratio on white and 17.04:1 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.