#1B00B3 Color
#1B00B3 is rgb(27, 0, 179) in RGB and hsl(249, 100%, 35%) in HSL. The closest CSS named color is MediumBlue. White text is most readable on this background.
#1B00B3
HEX
#1B00B3RGB
rgb(27, 0, 179)HSL
hsl(249, 100%, 35%)HSV
hsv(249, 100%, 70%)OKLCH
oklch(35.5% 0.235 269)CMYK
cmyk(85%, 100%, 0%, 30%)Text Contrast & Accessibility
WCAG contrast ratios for text on a #1B00B3 background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1.
TextWhite text12.37:1AA normal ✓AA large ✓AAA normal ✓
TextBlack text1.7:1AA normal ✗AA large ✗AAA normal ✗
Color Harmonies
Colors that pair well with #1B00B3 based on color wheel relationships. Click any swatch for its full breakdown.
Tints & Shades
Lighter tints and darker shades of #1B00B3, useful for hover states, backgrounds, and text variants.