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Recognised as Colour

#1F3848

  • #1F3848
  • Blue
  • Dark
  • Nearest: Dark slate grey

#1F3848 is a blue with RGB values 31, 56, 72 and HSL 203°, 40%, 20%. 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

#1F3848#1F3848
HEX#1F3848
RGBrgb(31, 56, 72)
RGB (0–1)0.1216, 0.2196, 0.2824
RGB percentages12.2%, 22%, 28.2%
HSLhsl(203.4, 39.8%, 20.2%)
HSV / HSBhsv(203.4, 56.9%, 28.2%)
CMYK56.9%, 22.2%, 0%, 71.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,046,024
CSS custom property--colour: #1F3848;

Brightness & contrast

Relative luminance0.03588WCAG 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 12.23:1
Contrast with white12.23:1WCAG normal text: AAA
Contrast with black1.72:1WCAG normal text: Fail
Greyscale equivalent#343434
Inverted#E0C7B7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#313849no red cones; affects about 1% of men; ΔE 6.4 from the original
Deuteranopia#2B3348no green cones; the most common form, about 1% of men; ΔE 7.2 from the original
Tritanopia#093C3Dno blue cones; rare, and affects men and women equally; ΔE 13.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.23:1WCAG large text: AAA
Contrast with black, large text1.72:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 14.8Dim grey · ΔE 26Black · ΔE 26Slate grey · ΔE 30.7Light slate grey · ΔE 33.8Gray · ΔE 34.1
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 14.78, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#482F1F
Analogous#1F4843, #1F2448
Triadic#481F38, #38481F
Split complementary#481F24, #48431F
Tetradic#431F48, #482F1F, #24481F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#71A2C2
Lighter +30%#4D8BB3
Lighter +20%#3E6F8F
Lighter +10%#2E546C
Darker −10%#101C24
Darker −20%#000101
Darker −30%#000000
Darker −40%#000000
More saturated +25%#123B55
Less saturated −25%#2C353B

Channel breakdown

R31
G56
B72
Red31 (12.2%)
Green56 (22%)
Blue72 (28.2%)
Hue203.41°
Saturation (HSL)39.81%
Lightness20.2%
Dominant channelBlue
Hex per channelR 1F · G 38 · B 48

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Every value on this page was computed from “1f3848” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.