#1F51BD Color

#1F51BD is rgb(31, 81, 189) in RGB and hsl(221, 72%, 43%) in HSL. The closest CSS named color is RoyalBlue. White text is most readable on this background.

#1F51BD
HEX#1F51BD
RGBrgb(31, 81, 189)
HSLhsl(221, 72%, 43%)
HSVhsv(221, 84%, 74%)
OKLCHoklch(47.1% 0.179 262.8)
CMYKcmyk(84%, 57%, 0%, 26%)

Text Contrast & Accessibility

WCAG contrast ratios for text on a #1F51BD background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1.

TextWhite text7.07:1AA normal ✓AA large ✓AAA normal ✓
TextBlack text2.97:1AA normal ✗AA large ✗AAA normal ✗

Color Harmonies

Colors that pair well with #1F51BD based on color wheel relationships. Click any swatch for its full breakdown.

Base#1F51BDComplementary#BD8B1FAnalogous#1FA0BDAnalogous#3C1FBDTriadic#BD1F51Triadic#51BD1F

Tints & Shades

Lighter tints and darker shades of #1F51BD, useful for hover states, backgrounds, and text variants.

Use #1F51BD in Our Tools

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