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Recognised as Colour

#1B3247

  • #1B3247
  • Blue
  • Dark
  • Nearest: Dark slate grey

#1B3247 is a blue with RGB values 27, 50, 71 and HSL 209°, 45%, 19%. It is a dark colour, so white text on it reaches 13.2:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1B3247#1B3247
HEX#1B3247
RGBrgb(27, 50, 71)
RGB (0–1)0.1059, 0.1961, 0.2784
RGB percentages10.6%, 19.6%, 27.8%
HSLhsl(208.6, 44.9%, 19.2%)
HSV / HSBhsv(208.6, 62%, 27.8%)
CMYK62%, 29.6%, 0%, 72.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,782,343
CSS custom property--colour: #1B3247;

Brightness & contrast

Relative luminance0.02969WCAG 2.x, 0 is black and 1 is white
Perceived brightness47.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.18:1
Contrast with white13.18:1WCAG normal text: AAA
Contrast with black1.59:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#E4CDB8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#293348no red cones; affects about 1% of men; ΔE 4.3 from the original
Deuteranopia#232E47no green cones; the most common form, about 1% of men; ΔE 5.3 from the original
Tritanopia#003739no blue cones; rare, and affects men and women equally; ΔE 16.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text13.18:1WCAG large text: AAA
Contrast with black, large text1.59:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 19.3Black · ΔE 25.5Dim grey · ΔE 29.2Slate grey · ΔE 33.3Light slate grey · ΔE 36.3Steel blue · ΔE 36.5
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 19.35, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#47301B
Analogous#1B4746, #1B1C47
Triadic#471B32, #32471B
Split complementary#471B1C, #47461B
Tetradic#461B47, #47301B, #1C471B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6899C6
Lighter +30%#4580B6
Lighter +20%#376691
Lighter +10%#294C6C
Darker −10%#0D1822
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0F3353
Less saturated −25%#27313B

Channel breakdown

R27
G50
B71
Red27 (10.6%)
Green50 (19.6%)
Blue71 (27.8%)
Hue208.64°
Saturation (HSL)44.9%
Lightness19.22%
Dominant channelBlue
Hex per channelR 1B · G 32 · B 47

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Every value on this page was computed from “1b3247” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.