#0166CB Color

#0166CB is rgb(1, 102, 203) in RGB and hsl(210, 99%, 40%) in HSL. The closest CSS named color is RoyalBlue. White text is most readable on this background.

#0166CB

HEX#0166CB

RGBrgb(1, 102, 203)

HSLhsl(210, 99%, 40%)

HSVhsv(210, 100%, 80%)

OKLCHoklch(52.1% 0.176 255.7)

CMYKcmyk(100%, 50%, 0%, 20%)

Text Contrast & Accessibility

WCAG contrast ratios for text on a #0166CB background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1.

TextWhite text5.58:1AA normal ✓AA large ✓AAA normal ✗

TextBlack text3.76:1AA normal ✗AA large ✓AAA normal ✗

Color Harmonies

Colors that pair well with #0166CB based on color wheel relationships. Click any swatch for its full breakdown.

Base#0166CB Complementary#CB6601 Analogous#01CBCB Analogous#0101CB Triadic#CB0166 Triadic#66CB01

Tints & Shades

Lighter tints and darker shades of #0166CB, useful for hover states, backgrounds, and text variants.

Tints

#017AF4 #2591FE #4DA6FE #76BAFE #9FCFFF #CCE5FF

Shades

#0159B2 #014C98 #01407F #003060 #002447 #00172E

Use #0166CB in Our Tools

Hex to RGB Hex to HSL Hex to CMYK Hex to Pantone RGBA to Hex