#40B300 Hex Color
Bright, energetic green with sunny warmth
A highly saturated, medium-bright green with a noticeable yellow undertone, #40b300 feels energetic and direct. It works best as a small accent for calls to action, sustainability brands, pharmacy interfaces, or garden products rather than a full-page background. Use black text for strong readability, as this hex code provides about 7.7:1 contrast.
Questions about #40b300
What is #40b300 in RGB, HSL and CMYK?
In RGB, #40b300 is rgb(64, 179, 0), in HSL hsl(99, 100%, 35%) and in CMYK 64%, 0%, 100%, 30%.
What colors pair well with #40b300?
Is #40b300 a warm or cool green?
#40b300 reads as a warm green because its noticeable yellow undertone shifts it away from blue-green hues, giving the shade an energetic, lively character that suits action accents and nature-focused designs needing more visual punch.
Is #40b300 readable on white or black?
#40b300 has a 2.73:1 contrast ratio on white and 7.66:1 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.