/
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
#1537FD
RGB Values
21, 55, 253
HSL Values
231°, 98%, 54%
CMYK Values
92%, 78%, 0%, 1%

Color Variations & Tints

  • #627AFD

    Lightness: 69%

  • #4964FD

    Lightness: 64%

  • #304FFD

    Lightness: 59%

  • #1537FD

    Lightness: 54%

    Current color

  • #0227F7

    Lightness: 49%

  • #0223DE

    Lightness: 44%

  • #021FC5

    Lightness: 39%

Accessibility

White Text
7.0
PASS
Black Text
3.0
FAIL
WCAG AA
PASS
WCAG AAA
PASS

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 #1537FD

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

Current: #1537FD

Discover More Colors

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