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Recognised as Colour

#1C3347

  • #1C3347
  • Blue
  • Dark
  • Nearest: Dark slate grey

#1C3347 is a blue with RGB values 28, 51, 71 and HSL 208°, 43%, 19%. It is a dark colour, so white text on it reaches 13:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1C3347#1C3347
HEX#1C3347
RGBrgb(28, 51, 71)
RGB (0–1)0.1098, 0.2, 0.2784
RGB percentages11%, 20%, 27.8%
HSLhsl(207.9, 43.4%, 19.4%)
HSV / HSBhsv(207.9, 60.6%, 27.8%)
CMYK60.6%, 28.2%, 0%, 72.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,848,135
CSS custom property--colour: #1C3347;

Brightness & contrast

Relative luminance0.03069WCAG 2.x, 0 is black and 1 is white
Perceived brightness48.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.01:1
Contrast with white13.01:1WCAG normal text: AAA
Contrast with black1.61:1WCAG normal text: Fail
Greyscale equivalent#303030
Inverted#E3CCB8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2B3348no red cones; affects about 1% of men; ΔE 5.1 from the original
Deuteranopia#252F47no green cones; the most common form, about 1% of men; ΔE 5.6 from the original
Tritanopia#03383Ano blue cones; rare, and affects men and women equally; ΔE 16 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text13.01:1WCAG large text: AAA
Contrast with black, large text1.61:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 18.5Black · ΔE 25.4Dim grey · ΔE 28.5Slate grey · ΔE 32.8Light slate grey · ΔE 35.8Steel blue · ΔE 36.4
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 18.5, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#47301C
Analogous#1C4746, #1C1D47
Triadic#471C33, #33471C
Split complementary#471C1E, #47461C
Tetradic#461C47, #47301C, #1D471C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6B9BC4
Lighter +30%#4782B5
Lighter +20%#396890
Lighter +10%#2A4D6C
Darker −10%#0E1922
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#103453
Less saturated −25%#28323B

Channel breakdown

R28
G51
B71
Red28 (11%)
Green51 (20%)
Blue71 (27.8%)
Hue207.91°
Saturation (HSL)43.43%
Lightness19.41%
Dominant channelBlue
Hex per channelR 1C · G 33 · B 47

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Every value on this page was computed from “1c3347” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.