Cerulean Blue
A moderately saturated, cool medium blue.
#2A52BE
rgb(42, 82, 190)
Color formats
HEX
#2A52BE
RGB
rgb(42, 82, 190)
HSL
hsl(223.8, 63.8%, 45.5%)
HSV
hsv(223.8, 77.9%, 74.5%)
CMYK
cmyk(77.9%, 56.8%, 0%, 25.5%)
Color shades
Lighter tints and darker shades of Cerulean Blue.
Lightest
#C2CFF2
Lighter
#6F8DDF
Base
#2A52BE
Darker
#182E6B
Darkest
#050A17
Complementary
The opposite hue on the color wheel.
Analogous
Neighbouring hues that harmonise.
Contrast & readability
Where Cerulean Blue works
Cerulean Blue (#2A52BE) is a moderately saturated, cool medium 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 Cerulean 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.