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Colour

#1B4682

  • #1B4682
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1B4682 is a blue with RGB values 27, 70, 130 and HSL 215°, 66%, 31%. It is a dark colour, so white text on it reaches 9.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1B4682#1B4682
HEX#1B4682
RGBrgb(27, 70, 130)
RGB (0–1)0.1059, 0.2745, 0.5098
RGB percentages10.6%, 27.5%, 51%
HSLhsl(215, 65.6%, 30.8%)
HSV / HSBhsv(215, 79.2%, 51%)
CMYK79.2%, 46.2%, 0%, 49%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,787,522
CSS custom property--colour: #1B4682;

Brightness & contrast

Relative luminance0.06225WCAG 2.x, 0 is black and 1 is white
Perceived brightness70.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.35:1
Contrast with white9.35:1WCAG normal text: AAA
Contrast with black2.25:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#E4B97D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#274C84no red cones; affects about 1% of men; ΔE 3.9 from the original
Deuteranopia#124281no green cones; the most common form, about 1% of men; ΔE 2.8 from the original
Tritanopia#00545Dno blue cones; rare, and affects men and women equally; ΔE 37.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.35:1WCAG large text: AAA
Contrast with black, large text2.25:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 18.4Steel blue · ΔE 26.2Midnight blue · ΔE 29.8Cornflower blue · ΔE 33.9Rebecca purple · ΔE 36.1Slate grey · ΔE 37.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 18.44, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#82571B
Analogous#1B7A82, #231B82
Triadic#821B46, #46821B
Split complementary#82231B, #7A821B
Tetradic#821B7A, #82571B, #1B8223

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#84ACE5
Lighter +30%#5990DD
Lighter +20%#2F74D4
Lighter +10%#245DAC
Darker −10%#122F58
Darker −20%#09192E
Darker −30%#010203
Darker −40%#000000
More saturated +25%#074396
Less saturated −25%#2F496E

Channel breakdown

R27
G70
B130
Red27 (10.6%)
Green70 (27.5%)
Blue130 (51%)
Hue214.95°
Saturation (HSL)65.61%
Lightness30.78%
Dominant channelBlue
Hex per channelR 1B · G 46 · B 82

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Every value on this page was computed from “1b4682” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.