/
Colorbook
Sign in Sign up

Color Information

Blue

Complete color analysis with professional format conversions, accessibility metrics, and harmonious color combinations for your design projects.

HEX Format
#378BCA
RGB Values
55, 139, 202
HSL Values
206°, 58%, 50%
CMYK Values
73%, 31%, 0%, 21%

Color Variations & Tints

  • #72ADDA

    Lightness: 65%

  • #5EA1D4

    Lightness: 60%

  • #4A95CF

    Lightness: 55%

  • #378BCA

    Lightness: 50%

    Current color

  • #307CB5

    Lightness: 45%

  • #2B6EA1

    Lightness: 40%

  • #25608D

    Lightness: 35%

Accessibility

White Text
3.7
FAIL
Black Text
5.7
PASS
WCAG AA
PASS
WCAG AAA
FAIL

Accessibility Guide

Contrast Ratios
Higher values (4.5+) ensure better readability for users with visual impairments.
WCAG AA Standard
Minimum requirement: 4.5:1 contrast for normal text, 3:1 for large text.
WCAG AAA Standard
Enhanced level: 7:1 contrast for normal text, 4.5:1 for large text.

Color Harmonies

  • Complementary

    Colors opposite on the color wheel, creating high contrast

  • Triadic

    Three evenly spaced colors forming a triangle on the color wheel

  • Analogous

    Adjacent colors on the color wheel, creating harmony and unity

Be picky and fine tune your color: colors very near to #378BCA

Systematic progression of extremely similar colors. Each color represents a precise step in lightness variation.

Current: #378BCA

Discover More Colors

Explore a randomly curated selection of colors. Each refresh brings new inspiration for your palette.