Colour

#1B255D

#1B255D
Blue
Dark
Nearest: Dark slateblue

#1B255D is a blue with RGB values 27, 37, 93 and HSL 231°, 55%, 24%. It is a dark colour, so white text on it reaches 14.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1B255D#1B255D

HEX#1B255D

RGBrgb(27, 37, 93)

RGB (0–1)0.1059, 0.1451, 0.3647

RGB percentages10.6%, 14.5%, 36.5%

HSLhsl(230.9, 55%, 23.5%)

HSV / HSBhsv(230.9, 71%, 36.5%)

CMYK71%, 60.2%, 0%, 63.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,779,037

CSS custom property--colour: #1B255D;

Brightness & contrast

Relative luminance0.02346WCAG 2.x, 0 is black and 1 is white

Perceived brightness44.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 14.29:1

Contrast with white14.29:1WCAG normal text: AAA

Contrast with black1.47:1WCAG normal text: Fail

Greyscale equivalent#272727

Inverted#E4DAA2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#002D5Fno red cones; affects about 1% of men; ΔE 8.6 from the original

Deuteranopia#00275Cno green cones; the most common form, about 1% of men; ΔE 5.3 from the original

Tritanopia#00333Dno blue cones; rare, and affects men and women equally; ΔE 36.9 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text14.29:1WCAG large text: AAA

Contrast with black, large text1.47:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 18.2 Midnight blue · ΔE 21.3 Rebecca purple · ΔE 33.1 Indigo · ΔE 39.9 Steel blue · ΔE 40.9 Slate blue · ΔE 41.2

Nearest named CSS colourDark slateblue (#483D8B)ΔE 18.17, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#5D531B

Analogous#1B465D, #321B5D

Triadic#5D1B25, #255D1B

Split complementary#5D321B, #465D1B

Tetradic#5D1B46, #5D531B, #1B5D32

Tints, shades & saturation

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

Lighter +40%#6F7ED5

Lighter +30%#475BCA

Lighter +20%#3244AC

Lighter +10%#263585

Darker −10%#101535

Darker −20%#04060E

Darker −30%#000000

Darker −40%#000000

More saturated +25%#0C1B6C

Less saturated −25%#2A2F4E

Channel breakdown

R27

G37

B93

Red27 (10.6%)

Green37 (14.5%)

Blue93 (36.5%)

Hue230.91°

Saturation (HSL)55%

Lightness23.53%

Dominant channelBlue

Hex per channelR 1B · G 25 · B 5D

Keep nerding

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

#1B255D

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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