About Bright Green
Bright Green is a vivid, mid-toned yellow-green at #66ff00, sitting closest to chartreuse on the color wheel. In color psychology it reads as edgy, electric, and unconventional — a bright presence, and it brings noticeable energy to a layout.
For text on Bright Green, black performs best at 15.87:1 — passing WCAG AAA. In a palette it suits accent roles.
Contrast Accessibility
With white
1.32:1
With black
15.87:1
Color Conversions
#66ff00
rgb(102, 255, 0)
hsl(96°, 100%, 50%)
oklch(0.882 0.275 138.5)
cmyk(6000%, 0%, 10000%, 0%)
Tint & Shade Scale
A 10-step scale from light to dark, anchored to the base color at step 500. Click any swatch to copy its hex.
Tone Scale
Color mixed with gray — reduces saturation without changing lightness. Click any swatch to copy its hex.
Temperature
Hue shifted cooler and warmer in equal steps. Click any swatch to copy its hex.
Color Psychology
Adds: cheerfulness, energy, youthfulness, boldness, intensity, approachability, openness · Reduces: formality
Palette Narrative
A thoughtfully curated palette evoking cheerful, edgy, electric. Well-suited for bold and disruptive brand contexts. A focused selection that communicates intent clearly.
Inspired Palettes
Shades
Lightness variations keeping hue and chroma intact
Monochromatic
Single hue with varied lightness and chroma
Complementary
Opposite hues on the color wheel for maximum contrast
Triadic
Three evenly spaced hues for vibrant balance
Analogous
Neighboring hues for natural, serene combinations
Split Complementary
Complement split into two flanking hues
Generic Gradient
Smooth lightness ramp from dark to light
Matching Gradient
Lightness ramp with a gentle hue drift
Skip Gradient
Alternating light and dark steps for rhythm
9 of 28 palettes from #66ff00
Similar Colors
Green Slime
#65FF00deltaE 0.0Poisoning Green
#66FF11deltaE 0.0Bright Lime Green
#65FE08deltaE 0.0Venomous Green
#66FF22deltaE 0.0Fertility Green
#66FC00deltaE 0.0Poisonous
#55FF11deltaE 0.0