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Recognised as Colour

#1B1F27

  • #1B1F27
  • Blue
  • Dark
  • Nearest: Black

#1B1F27 is a blue with RGB values 27, 31, 39 and HSL 220°, 18%, 13%. It is a dark colour, so white text on it reaches 16.5:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#1B1F27#1B1F27
HEX#1B1F27
RGBrgb(27, 31, 39)
RGB (0–1)0.1059, 0.1216, 0.1529
RGB percentages10.6%, 12.2%, 15.3%
HSLhsl(220, 18.2%, 12.9%)
HSV / HSBhsv(220, 30.8%, 15.3%)
CMYK30.8%, 20.5%, 0%, 84.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,777,447
CSS custom property--colour: #1B1F27;

Brightness & contrast

Relative luminance0.01359WCAG 2.x, 0 is black and 1 is white
Perceived brightness30.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.51:1
Contrast with white16.51:1WCAG normal text: AAA
Contrast with black1.27:1WCAG normal text: Fail
Greyscale equivalent#1F1F1F
Inverted#E4E0D8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1C1F27no red cones; affects about 1% of men; ΔE 0.4 from the original
Deuteranopia#1B1E27no green cones; the most common form, about 1% of men; ΔE 1 from the original
Tritanopia#182122no blue cones; rare, and affects men and women equally; ΔE 5.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.51:1WCAG large text: AAA
Contrast with black, large text1.27:1WCAG large text: Fail

Named colours

Black · ΔE 13.1Dark slate grey · ΔE 23.2Dim grey · ΔE 33.3Slate grey · ΔE 41.5Gray · ΔE 42.3Light slate grey · ΔE 44.6
Nearest named CSS colourBlack (#000000)ΔE 13.15, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#27231B
Analogous#1B2527, #1D1B27
Triadic#271B1F, #1F271B
Split complementary#271D1B, #25271B
Tetradic#271B25, #27231B, #1B271D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#71809D
Lighter +30%#5A6781
Lighter +20%#454F63
Lighter +10%#303745
Darker −10%#060709
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#131C2F
Less saturated −25%#212121

Channel breakdown

R27
G31
B39
Red27 (10.6%)
Green31 (12.2%)
Blue39 (15.3%)
Hue220°
Saturation (HSL)18.18%
Lightness12.94%
Dominant channelBlue
Hex per channelR 1B · G 1F · B 27

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Every value on this page was computed from “1b1f27” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.