Recognised as Colour

#1B5DDB

#1B5DDB
Blue
Dark
Nearest: Royal blue

#1B5DDB is a blue with RGB values 27, 93, 219 and HSL 219°, 78%, 48%. It is a dark colour, so white text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#1B5DDB#1B5DDB

HEX#1B5DDB

RGBrgb(27, 93, 219)

RGB (0–1)0.1059, 0.3647, 0.8588

RGB percentages10.6%, 36.5%, 85.9%

HSLhsl(219.4, 78%, 48.2%)

HSV / HSBhsv(219.4, 87.7%, 85.9%)

CMYK87.7%, 57.5%, 0%, 14.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,793,499

CSS custom property--colour: #1B5DDB;

Brightness & contrast

Relative luminance0.13176WCAG 2.x, 0 is black and 1 is white

Perceived brightness103.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.78:1

Contrast with white5.78:1WCAG normal text: AA

Contrast with black3.64:1WCAG normal text: Fail

Greyscale equivalent#585858

Inverted#E4A224

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#006FDFno red cones; affects about 1% of men; ΔE 13.3 from the original

Deuteranopia#005DD9no green cones; the most common form, about 1% of men; ΔE 1.9 from the original

Tritanopia#007D93no blue cones; rare, and affects men and women equally; ΔE 69.9 from the original

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

Contrast with white, large text5.78:1WCAG large text: AAA

Contrast with black, large text3.64:1WCAG large text: AA

Named colours

Royal blue · ΔE 6.8 Slate blue · ΔE 14.5 Medium slateblue · ΔE 16.4 Medium purple · ΔE 24.6 Dodgerblue · ΔE 25.2 Rebecca purple · ΔE 28.8

Nearest named CSS colourRoyal blue (#4169E1)ΔE 6.81, clearly different but related

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#DB991B

Analogous#1BBDDB, #391BDB

Triadic#DB1B5D, #5DDB1B

Split complementary#DB391B, #BDDB1B

Tetradic#DB1BBD, #DB991B, #1BDB39

Tints, shades & saturation

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

Lighter +40%#CADAF8

Lighter +30%#9CBAF3

Lighter +20%#6F9AED

Lighter +10%#417BE8

Darker −10%#154AAE

Darker −20%#103680

Darker −30%#0A2353

Darker −40%#051025

More saturated +25%#0055F6

Less saturated −25%#3A67BC

Channel breakdown

R27

G93

B219

Red27 (10.6%)

Green93 (36.5%)

Blue219 (85.9%)

Hue219.38°

Saturation (HSL)78.05%

Lightness48.24%

Dominant channelBlue

Hex per channelR 1B · G 5D · B DB

Keep nerding

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

#1B5DDB

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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