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Recognised as Colour

#1B3649

  • #1B3649
  • Blue
  • Dark
  • Nearest: Dark slate grey

#1B3649 is a blue with RGB values 27, 54, 73 and HSL 205°, 46%, 20%. It is a dark colour, so white text on it reaches 12.6:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1B3649#1B3649
HEX#1B3649
RGBrgb(27, 54, 73)
RGB (0–1)0.1059, 0.2118, 0.2863
RGB percentages10.6%, 21.2%, 28.6%
HSLhsl(204.8, 46%, 19.6%)
HSV / HSBhsv(204.8, 63%, 28.6%)
CMYK63%, 26%, 0%, 71.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,783,369
CSS custom property--colour: #1B3649;

Brightness & contrast

Relative luminance0.03352WCAG 2.x, 0 is black and 1 is white
Perceived brightness50.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.57:1
Contrast with white12.57:1WCAG normal text: AAA
Contrast with black1.67:1WCAG normal text: Fail
Greyscale equivalent#323232
Inverted#E4C9B6

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2E364Ano red cones; affects about 1% of men; ΔE 6.3 from the original
Deuteranopia#273149no green cones; the most common form, about 1% of men; ΔE 7 from the original
Tritanopia#003B3Cno blue cones; rare, and affects men and women equally; ΔE 15.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.57:1WCAG large text: AAA
Contrast with black, large text1.67:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 16.9Black · ΔE 26.3Dim grey · ΔE 27.6Slate grey · ΔE 31.8Light slate grey · ΔE 34.7Steel blue · ΔE 35.6
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 16.89, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#492E1B
Analogous#1B4945, #1B1F49
Triadic#491B36, #36491B
Split complementary#491B1F, #49451B
Tetradic#451B49, #492E1B, #1F491B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#69A0C7
Lighter +30%#4489B9
Lighter +20%#376D93
Lighter +10%#29526E
Darker −10%#0D1A24
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0F3856
Less saturated −25%#28343D

Channel breakdown

R27
G54
B73
Red27 (10.6%)
Green54 (21.2%)
Blue73 (28.6%)
Hue204.78°
Saturation (HSL)46%
Lightness19.61%
Dominant channelBlue
Hex per channelR 1B · G 36 · B 49

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Every value on this page was computed from “1b3649” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.