Colour

#1F2879

#1F2879
Blue
Dark
Nearest: Midnight blue

#1F2879 is a blue with RGB values 31, 40, 121 and HSL 234°, 59%, 30%. It is a dark colour, so white text on it reaches 12.8:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#1F2879#1F2879

HEX#1F2879

RGBrgb(31, 40, 121)

RGB (0–1)0.1216, 0.1569, 0.4745

RGB percentages12.2%, 15.7%, 47.5%

HSLhsl(234, 59.2%, 29.8%)

HSV / HSBhsv(234, 74.4%, 47.5%)

CMYK74.4%, 66.9%, 0%, 52.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer2,041,977

CSS custom property--colour: #1F2879;

Brightness & contrast

Relative luminance0.03189WCAG 2.x, 0 is black and 1 is white

Perceived brightness53.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 12.82:1

Contrast with white12.82:1WCAG normal text: AAA

Contrast with black1.64:1WCAG normal text: Fail

Greyscale equivalent#2C2C2C

Inverted#E0D786

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#00367Cno red cones; affects about 1% of men; ΔE 12.3 from the original

Deuteranopia#002E77no green cones; the most common form, about 1% of men; ΔE 8 from the original

Tritanopia#003D4Cno blue cones; rare, and affects men and women equally; ΔE 50 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text12.82:1WCAG large text: AAA

Contrast with black, large text1.64:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 8 Dark slateblue · ΔE 11.3 Rebecca purple · ΔE 20.8 Indigo · ΔE 26.5 Slate blue · ΔE 28.6 Navy · ΔE 28.8

Nearest named CSS colourMidnight blue (#191970)ΔE 7.95, clearly different but related

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#79701F

Analogous#1F5579, #431F79

Triadic#791F28, #28791F

Split complementary#79431F, #55791F

Tetradic#791F55, #79701F, #1F7943

Tints, shades & saturation

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

Lighter +40%#848EE0

Lighter +30%#5C68D5

Lighter +20%#3443CA

Lighter +10%#2935A2

Darker −10%#151B50

Darker −20%#0A0D28

Darker −30%#000000

Darker −40%#000000

More saturated +25%#0C198C

Less saturated −25%#323766

Channel breakdown

R31

G40

B121

Red31 (12.2%)

Green40 (15.7%)

Blue121 (47.5%)

Hue234°

Saturation (HSL)59.21%

Lightness29.8%

Dominant channelBlue

Hex per channelR 1F · G 28 · B 79

Keep nerding

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#1F2879

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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