#666FD1 Color

#666FD1 is rgb(102, 111, 209) in RGB and hsl(235, 54%, 61%) in HSL. The closest CSS named color is SlateBlue. Black text is most readable on this background.

#666FD1

HEX#666FD1

RGBrgb(102, 111, 209)

HSLhsl(235, 54%, 61%)

HSVhsv(235, 51%, 82%)

OKLCHoklch(58.2% 0.149 276.8)

CMYKcmyk(51%, 47%, 0%, 18%)

Text Contrast & Accessibility

WCAG contrast ratios for text on a #666FD1 background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1.

TextWhite text4.41:1AA normal ✗AA large ✓AAA normal ✗

TextBlack text4.76:1AA normal ✓AA large ✓AAA normal ✗

Color Harmonies

Colors that pair well with #666FD1 based on color wheel relationships. Click any swatch for its full breakdown.

Base#666FD1 Complementary#D1C866 Analogous#66A5D1 Analogous#9366D1 Triadic#D1666F Triadic#6FD166

Tints & Shades

Lighter tints and darker shades of #666FD1, useful for hover states, backgrounds, and text variants.

Tints

#7981D7 #9197DE #A5AAE4 #B8BCEA #CCCFF0 #E4E5F7

Shades

#4651C8 #353FB1 #2B3491 #21276E #171C4F #0E112F

Use #666FD1 in Our Tools

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