Contrast Accessibility
With white
3.29:1
With black
6.39:1
Color Conversions
#669699
rgb(102, 150, 153)
hsl(184°, 20%, 50%)
oklch(0.640 0.052 200.9)
cmyk(3300%, 200%, 0%, 4000%)
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: sophistication, nostalgia, heritage, subtlety, refinement · Reduces: energy, urgency, visual intensity
Palette Narrative
A vintage palette evoking balanced, clean, clear. Well-suited for heritage and high_tech 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 #669699
Similar Colors
Desaturated Cyan
#669999deltaE 0.0RAL 210 60 15 - Baltic blue
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#6C9898deltaE 0.0Clear Brook
#60949BdeltaE 0.0Green Turquoise
#679591deltaE 0.0RAL 200 60 15 - Woad indigo
#6E9898deltaE 0.0