#66DD25 Hex Color
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The hex code #66dd25 is a bright, highly saturated lime green with a fresh yellow undertone. Its glowing energy fits sports, gaming, energy drinks, gardening, and sustainability branding. Use it as a bold accent with charcoal or navy rather than a full background. Black text offers strong contrast, supporting readable labels and interface elements.
Questions about #66dd25
What is #66dd25 in RGB, HSL and CMYK?
In RGB, #66dd25 is rgb(102, 221, 37), in HSL hsl(99, 73%, 51%) and in CMYK 54%, 0%, 83%, 13%.
Is #66dd25 a warm or cool color?
#66dd25 reads as a warm lime green because its strong green base is shifted toward yellow. That yellow undertone gives it a fresh, energetic feel, especially beside cooler navy or blue-gray neutrals.
What colors pair well with #66dd25?
For a balanced palette, pair #66dd25 with charcoal or navy, using the lime as an accent rather than a large background. Dark neutrals calm its high saturation, while black text keeps labels and controls readable.
Where does #66dd25 work best?
Use #66dd25 as a high-impact accent in sports graphics, gaming interfaces, energy-focused campaigns, garden products, and sustainability visuals. Its brightness draws attention to buttons, badges, and highlights, but large areas can feel visually intense.
Is #66dd25 readable on white or black?
#66dd25 has a 1.75:1 contrast ratio on white and 11.93:1 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.