Colour

#00308B

#00308B
Blue
Dark
Nearest: Midnight blue

#00308B is a blue with RGB values 0, 48, 139 and HSL 219°, 100%, 27%. It is a dark colour, so white text on it reaches 11.7:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#00308B#00308B

HEX#00308B

RGBrgb(0, 48, 139)

RGB (0–1)0, 0.1882, 0.5451

RGB percentages0%, 18.8%, 54.5%

HSLhsl(219.3, 100%, 27.3%)

HSV / HSBhsv(219.3, 100%, 54.5%)

CMYK100%, 65.5%, 0%, 45.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,427

CSS custom property--colour: #00308B;

Brightness & contrast

Relative luminance0.03978WCAG 2.x, 0 is black and 1 is white

Perceived brightness59.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 11.7:1

Contrast with white11.7:1WCAG normal text: AAA

Contrast with black1.8:1WCAG normal text: Fail

Greyscale equivalent#2C2C2C

Inverted#FFCF74

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#003E8Eno red cones; affects about 1% of men; ΔE 10.9 from the original

Deuteranopia#003289no green cones; the most common form, about 1% of men; ΔE 2.9 from the original

Tritanopia#004859no blue cones; rare, and affects men and women equally; ΔE 54.2 from the original

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

Contrast with white, large text11.7:1WCAG large text: AAA

Contrast with black, large text1.8:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 11 Dark slateblue · ΔE 14 Rebecca purple · ΔE 21.1 Slate blue · ΔE 24.6 Indigo · ΔE 26.7 Royal blue · ΔE 26.7

Nearest named CSS colourMidnight blue (#191970)ΔE 11.04, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#8B5B00

Analogous#00768B, #15008B

Triadic#8B0030, #308B00

Split complementary#8B1500, #768B00

Tetradic#8B0076, #8B5B00, #008B15

Tints, shades & saturation

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

Lighter +40%#5892FF

Lighter +30%#2570FF

Lighter +20%#0053F1

Lighter +10%#0042BE

Darker −10%#001E58

Darker −20%#000D25

Darker −30%#000000

Darker −40%#000000

More saturated +25%#00308B

Less saturated −25%#11357A

Channel breakdown

G48

B139

Red0 (0%)

Green48 (18.8%)

Blue139 (54.5%)

Hue219.28°

Saturation (HSL)100%

Lightness27.25%

Dominant channelBlue

Hex per channelR 00 · G 30 · B 8B

Keep nerding

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#00308B

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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