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Recognised as Colour

#1B3948

  • #1B3948
  • Blue
  • Dark
  • Nearest: Dark slate grey

#1B3948 is a blue with RGB values 27, 57, 72 and HSL 200°, 45%, 19%. It is a dark colour, so white text on it reaches 12.2:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1B3948#1B3948
HEX#1B3948
RGBrgb(27, 57, 72)
RGB (0–1)0.1059, 0.2235, 0.2824
RGB percentages10.6%, 22.4%, 28.2%
HSLhsl(200, 45.5%, 19.4%)
HSV / HSBhsv(200, 62.5%, 28.2%)
CMYK62.5%, 20.8%, 0%, 71.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,784,136
CSS custom property--colour: #1B3948;

Brightness & contrast

Relative luminance0.03627WCAG 2.x, 0 is black and 1 is white
Perceived brightness52.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.17:1
Contrast with white12.17:1WCAG normal text: AAA
Contrast with black1.73:1WCAG normal text: Fail
Greyscale equivalent#343434
Inverted#E4C6B7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#323849no red cones; affects about 1% of men; ΔE 8.3 from the original
Deuteranopia#2B3348no green cones; the most common form, about 1% of men; ΔE 9 from the original
Tritanopia#003D3Eno blue cones; rare, and affects men and women equally; ΔE 12.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.17:1WCAG large text: AAA
Contrast with black, large text1.73:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 13.8Dim grey · ΔE 26.1Black · ΔE 26.4Slate grey · ΔE 30.8Light slate grey · ΔE 33.8Gray · ΔE 34.2
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 13.79, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#482A1B
Analogous#1B4841, #1B2348
Triadic#481B39, #39481B
Split complementary#481B23, #48411B
Tetradic#411B48, #482A1B, #23481B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#68A7C7
Lighter +30%#4591B7
Lighter +20%#377492
Lighter +10%#29566D
Darker −10%#0D1C23
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0F3D54
Less saturated −25%#27353C

Channel breakdown

R27
G57
B72
Red27 (10.6%)
Green57 (22.4%)
Blue72 (28.2%)
Hue200°
Saturation (HSL)45.45%
Lightness19.41%
Dominant channelBlue
Hex per channelR 1B · G 39 · B 48

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Every value on this page was computed from “1b3948” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.