Colour

#0000FF

#0000FF
Blue
Dark
Named: Blue

#0000FF is the CSS colour blue with RGB values 0, 0, 255 and HSL 240°, 100%, 50%. It is a dark colour, so white text on it reaches 8.6:1 contrast (AAA for normal text). The nearest named colour is Blue.

Colour values

#0000FF#0000FF

HEX#0000FF

HEX (short)#00F

RGBrgb(0, 0, 255)

RGB (0–1)0, 0, 1

RGB percentages0%, 0%, 100%

HSLhsl(240, 100%, 50%)

HSV / HSBhsv(240, 100%, 100%)

CMYK100%, 100%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer255

CSS custom property--colour: #0000FF;

Brightness & contrast

Relative luminance0.0722WCAG 2.x, 0 is black and 1 is white

Perceived brightness86.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 8.59:1

Contrast with white8.59:1WCAG normal text: AAA

Contrast with black2.44:1WCAG normal text: Fail

Greyscale equivalent#121212

Inverted#FFFF00

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0059FFno red cones; affects about 1% of men; ΔE 43.2 from the original

Deuteranopia#003DFBno green cones; the most common form, about 1% of men; ΔE 25 from the original

Tritanopia#006B96no blue cones; rare, and affects men and women equally; ΔE 118.1 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text8.59:1WCAG large text: AAA

Contrast with black, large text2.44:1WCAG large text: Fail

Named colours

Blue · ΔE 0 Medium blue · ΔE 21.6 Blue violet · ΔE 35.8 Dark violet · ΔE 38.3 Dark orchid · ΔE 51 Dark blue · ΔE 51.7

This is a named CSS colourBlue (#0000FF)exact match

Hue familyblue

CSS keyword usableblue

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#FFFF00

Analogous#0080FF, #8000FF

Triadic#FF0000, #00FF00

Split complementary#FF8000, #80FF00

Tetradic#FF0080, #FFFF00, #00FF80

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#CCCCFF

Lighter +30%#9999FF

Lighter +20%#6666FF

Lighter +10%#3333FF

Darker −10%#0000CC

Darker −20%#000099

Darker −30%#000066

Darker −40%#000033

More saturated +25%#0000FF

Less saturated −25%#2020DF

Channel breakdown

B255

Red0 (0%)

Green0 (0%)

Blue255 (100%)

Hue240°

Saturation (HSL)100%

Lightness50%

Dominant channelBlue

Hex per channelR 00 · G 00 · B FF

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#0000FF

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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