Colour

#003FB3

#003FB3
Blue
Dark
Nearest: Slate blue

#003FB3 is a blue with RGB values 0, 63, 179 and HSL 219°, 100%, 35%. It is a dark colour, so white text on it reaches 8.9:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#003FB3#003FB3

HEX#003FB3

RGBrgb(0, 63, 179)

RGB (0–1)0, 0.2471, 0.702

RGB percentages0%, 24.7%, 70.2%

HSLhsl(218.9, 100%, 35.1%)

HSV / HSBhsv(218.9, 100%, 70.2%)

CMYK100%, 64.8%, 0%, 29.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,307

CSS custom property--colour: #003FB3;

Brightness & contrast

Relative luminance0.0681WCAG 2.x, 0 is black and 1 is white

Perceived brightness77.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 8.89:1

Contrast with white8.89:1WCAG normal text: AAA

Contrast with black2.36:1WCAG normal text: Fail

Greyscale equivalent#3A3A3A

Inverted#FFC04C

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0052B7no red cones; affects about 1% of men; ΔE 14.1 from the original

Deuteranopia#0042B1no green cones; the most common form, about 1% of men; ΔE 3.6 from the original

Tritanopia#005E73no blue cones; rare, and affects men and women equally; ΔE 66.4 from the original

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

Contrast with white, large text8.89:1WCAG large text: AAA

Contrast with black, large text2.36:1WCAG large text: Fail

Named colours

Slate blue · ΔE 16.7 Royal blue · ΔE 17.2 Rebecca purple · ΔE 21.9 Midnight blue · ΔE 22.3 Medium slateblue · ΔE 23 Dark slateblue · ΔE 24

Nearest named CSS colourSlate blue (#6A5ACD)ΔE 16.72, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#B37400

Analogous#0099B3, #1A00B3

Triadic#B3003F, #3FB300

Split complementary#B31A00, #99B300

Tetradic#B30099, #B37400, #00B31A

Tints, shades & saturation

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

Lighter +40%#80ADFF

Lighter +30%#4D8CFF

Lighter +20%#1A6BFF

Lighter +10%#0051E6

Darker −10%#002D80

Darker −20%#001B4D

Darker −30%#00091A

Darker −40%#000000

More saturated +25%#003FB3

Less saturated −25%#16469D

Channel breakdown

G63

B179

Red0 (0%)

Green63 (24.7%)

Blue179 (70.2%)

Hue218.88°

Saturation (HSL)100%

Lightness35.1%

Dominant channelBlue

Hex per channelR 00 · G 3F · B B3

Keep nerding

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

#003FB3

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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