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Colour

#1B3B6C

  • #1B3B6C
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1B3B6C is a blue with RGB values 27, 59, 108 and HSL 216°, 60%, 26%. It is a dark colour, so white text on it reaches 11.1:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1B3B6C#1B3B6C
HEX#1B3B6C
RGBrgb(27, 59, 108)
RGB (0–1)0.1059, 0.2314, 0.4235
RGB percentages10.6%, 23.1%, 42.4%
HSLhsl(216.3, 60%, 26.5%)
HSV / HSBhsv(216.3, 75%, 42.4%)
CMYK75%, 45.4%, 0%, 57.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,784,684
CSS custom property--colour: #1B3B6C;

Brightness & contrast

Relative luminance0.04444WCAG 2.x, 0 is black and 1 is white
Perceived brightness59.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.12:1
Contrast with white11.12:1WCAG normal text: AAA
Contrast with black1.89:1WCAG normal text: Fail
Greyscale equivalent#383838
Inverted#E4C493

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#23406Eno red cones; affects about 1% of men; ΔE 3.2 from the original
Deuteranopia#15386Bno green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#00464Eno blue cones; rare, and affects men and women equally; ΔE 31.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.12:1WCAG large text: AAA
Contrast with black, large text1.89:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 22.6Steel blue · ΔE 29.4Midnight blue · ΔE 31.9Dark slate grey · ΔE 34.3Slate grey · ΔE 36.2Dim grey · ΔE 38
Nearest named CSS colourDark slateblue (#483D8B)ΔE 22.56, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6C4C1B
Analogous#1B646C, #241B6C
Triadic#6C1B3B, #3B6C1B
Split complementary#6C241B, #636C1B
Tetradic#6C1B64, #6C4C1B, #1B6C24

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#769FDD
Lighter +30%#4D82D3
Lighter +20%#2F68BE
Lighter +10%#255195
Darker −10%#112543
Darker −20%#070E1A
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0A377D
Less saturated −25%#2C3F5B

Channel breakdown

R27
G59
B108
Red27 (10.6%)
Green59 (23.1%)
Blue108 (42.4%)
Hue216.3°
Saturation (HSL)60%
Lightness26.47%
Dominant channelBlue
Hex per channelR 1B · G 3B · B 6C

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Every value on this page was computed from “1b3b6c” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.