Colour

#1B3765

#1B3765
Blue
Dark
Nearest: Dark slateblue

#1B3765 is a blue with RGB values 27, 55, 101 and HSL 217°, 58%, 25%. It is a dark colour, so white text on it reaches 11.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1B3765#1B3765

HEX#1B3765

RGBrgb(27, 55, 101)

RGB (0–1)0.1059, 0.2157, 0.3961

RGB percentages10.6%, 21.6%, 39.6%

HSLhsl(217.3, 57.8%, 25.1%)

HSV / HSBhsv(217.3, 73.3%, 39.6%)

CMYK73.3%, 45.5%, 0%, 60.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,783,653

CSS custom property--colour: #1B3765;

Brightness & contrast

Relative luminance0.03905WCAG 2.x, 0 is black and 1 is white

Perceived brightness56.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 11.79:1

Contrast with white11.79:1WCAG normal text: AAA

Contrast with black1.78:1WCAG normal text: Fail

Greyscale equivalent#343434

Inverted#E4C89A

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#213B67no red cones; affects about 1% of men; ΔE 2.4 from the original

Deuteranopia#143464no green cones; the most common form, about 1% of men; ΔE 2.1 from the original

Tritanopia#004249no blue cones; rare, and affects men and women equally; ΔE 30.4 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text11.79:1WCAG large text: AAA

Contrast with black, large text1.78:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 23.9 Steel blue · ΔE 31.1 Midnight blue · ΔE 32.5 Dark slate grey · ΔE 33.2 Slate grey · ΔE 36.5 Dim grey · ΔE 37.4

Nearest named CSS colourDark slateblue (#483D8B)ΔE 23.91, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#65491B

Analogous#1B5C65, #241B65

Triadic#651B37, #37651B

Split complementary#65241B, #5C651B

Tetradic#651B5C, #65491B, #1B6524

Tints, shades & saturation

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

Lighter +40%#7399D9

Lighter +30%#4A7CCF

Lighter +20%#3163B5

Lighter +10%#264D8D

Darker −10%#10213D

Darker −20%#050B15

Darker −30%#000000

Darker −40%#000000

More saturated +25%#0B3375

Less saturated −25%#2B3B55

Channel breakdown

R27

G55

B101

Red27 (10.6%)

Green55 (21.6%)

Blue101 (39.6%)

Hue217.3°

Saturation (HSL)57.81%

Lightness25.1%

Dominant channelBlue

Hex per channelR 1B · G 37 · B 65

Keep nerding

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#1B3765

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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