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Recognised as Colour

#4740BB

  • #4740BB
  • Blue
  • Dark
  • Nearest: Slate blue

#4740BB is a blue with RGB values 71, 64, 187 and HSL 243°, 49%, 49%. It is a dark colour, so white text on it reaches 7.7:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#4740BB#4740BB
HEX#4740BB
RGBrgb(71, 64, 187)
RGB (0–1)0.2784, 0.251, 0.7333
RGB percentages27.8%, 25.1%, 73.3%
HSLhsl(243.4, 49%, 49.2%)
HSV / HSBhsv(243.4, 65.8%, 73.3%)
CMYK62%, 65.8%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,669,627
CSS custom property--colour: #4740BB;

Brightness & contrast

Relative luminance0.08594WCAG 2.x, 0 is black and 1 is white
Perceived brightness88.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.72:1
Contrast with white7.72:1WCAG normal text: AAA
Contrast with black2.72:1WCAG normal text: Fail
Greyscale equivalent#4A4A4A
Inverted#B8BF44

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0058BFno red cones; affects about 1% of men; ΔE 21.1 from the original
Deuteranopia#004EB9no green cones; the most common form, about 1% of men; ΔE 16.3 from the original
Tritanopia#006078no blue cones; rare, and affects men and women equally; ΔE 69.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.72:1WCAG large text: AAA
Contrast with black, large text2.72:1WCAG large text: Fail

Named colours

Slate blue · ΔE 12.4Medium slateblue · ΔE 17.1Rebecca purple · ΔE 17.2Royal blue · ΔE 18.4Indigo · ΔE 21.8Navy · ΔE 23.6
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 12.38, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B4BB40
Analogous#4077BB, #8440BB
Triadic#BB4740, #40BB47
Split complementary#BB8440, #77BB40
Tetradic#BB4077, #B4BB40, #40BB84

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D8D6F1
Lighter +30%#B3B0E4
Lighter +20%#8E8AD7
Lighter +10%#6A64CA
Darker −10%#393395
Darker −20%#2A266F
Darker −30%#1C1949
Darker −40%#0D0C23
More saturated +25%#2B21DA
Less saturated −25%#635F9C

Channel breakdown

R71
G64
B187
Red71 (27.8%)
Green64 (25.1%)
Blue187 (73.3%)
Hue243.41°
Saturation (HSL)49%
Lightness49.22%
Dominant channelBlue
Hex per channelR 47 · G 40 · B BB

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Every value on this page was computed from “4740bb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.