Deep Blue
A vivid, cool dark blue.
#000099
rgb(0, 0, 153)
Color formats
HEX
#000099
RGB
rgb(0, 0, 153)
HSL
hsl(240, 100%, 30%)
HSV
hsv(240, 100%, 60%)
CMYK
cmyk(100%, 100%, 0%, 40%)
Color shades
Lighter tints and darker shades of Deep Blue.
Lightest
#6666FF
Lighter
#0000FF
Base
#000099
Darker
#000033
Darkest
#000000
Complementary
The opposite hue on the color wheel.
Analogous
Neighbouring hues that harmonise.
Contrast & readability
Where Deep Blue works
Deep Blue (#000099) is a vivid, cool dark blue. Its mid-range lightness makes it a flexible choice for buttons, fills and accents that need to read clearly without overpowering a layout. Its cool undertone lends a calm, trustworthy feel that suits clean, professional interfaces.
Observe the spectrum
More colors related to Deep Blue — or browse all blues.
Color tools
Color Format Converter
Convert any color between HEX, RGB, HSL, HSV, CMYK and OKLCH instantly — and copy ready-to-paste CSS, SCSS or Tailwind.
Color Picker
Pick any color visually and copy accurate HEX, RGB, HSL and CMYK codes — no signup.
Palette Generator
Generate harmonious color palettes from any base color — complementary, analogous, triadic and more, with instant CSS export.
Contrast Checker
Test color contrast against WCAG 2.1 AA/AAA — live pass/fail, font-size rules, and a real component preview.
Shade & Tint Generator
Generate 10–12 step tints and shades from any color — perfect 50–950 UI ramps with CSS and Tailwind export.
Complementary Color Finder
Find the perfect complementary (180° opposite) color for any shade, with HEX/RGB/HSL and contrast info.