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Recognised as Colour

#47579B

  • #47579B
  • Blue
  • Dark
  • Nearest: Dark slateblue

#47579B is a blue with RGB values 71, 87, 155 and HSL 229°, 37%, 44%. It is a dark colour, so white text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#47579B#47579B
HEX#47579B
RGBrgb(71, 87, 155)
RGB (0–1)0.2784, 0.3412, 0.6078
RGB percentages27.8%, 34.1%, 60.8%
HSLhsl(228.6, 37.2%, 44.3%)
HSV / HSBhsv(228.6, 54.2%, 60.8%)
CMYK54.2%, 43.9%, 0%, 39.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,675,483
CSS custom property--colour: #47579B;

Brightness & contrast

Relative luminance0.10523WCAG 2.x, 0 is black and 1 is white
Perceived brightness93.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.76:1
Contrast with white6.76:1WCAG normal text: AA
Contrast with black3.1:1WCAG normal text: Fail
Greyscale equivalent#595959
Inverted#B8A864

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3A5F9Eno red cones; affects about 1% of men; ΔE 7.1 from the original
Deuteranopia#31589Ano green cones; the most common form, about 1% of men; ΔE 5.7 from the original
Tritanopia#1E6671no blue cones; rare, and affects men and women equally; ΔE 41.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.76:1WCAG large text: AAA
Contrast with black, large text3.1:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 14.5Steel blue · ΔE 23.9Cornflower blue · ΔE 25.8Slate blue · ΔE 29.4Medium purple · ΔE 29.9Royal blue · ΔE 30.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 14.54, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9B8B47
Analogous#47819B, #61479B
Triadic#9B4757, #579B47
Split complementary#9B6147, #819B47
Tetradic#9B4781, #9B8B47, #479B61

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C8CEE6
Lighter +30%#A5AED6
Lighter +20%#828FC6
Lighter +10%#5F70B6
Darker −10%#374378
Darker −20%#273055
Darker −30%#171C32
Darker −40%#07080F
More saturated +25%#2B46B7
Less saturated −25%#63687F

Channel breakdown

R71
G87
B155
Red71 (27.8%)
Green87 (34.1%)
Blue155 (60.8%)
Hue228.57°
Saturation (HSL)37.17%
Lightness44.31%
Dominant channelBlue
Hex per channelR 47 · G 57 · B 9B

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Every value on this page was computed from “47579b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.