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Recognised as Colour

#57478F

  • #57478F
  • Blue
  • Dark
  • Nearest: Dark slateblue

#57478F is a blue with RGB values 87, 71, 143 and HSL 253°, 34%, 42%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#57478F#57478F
HEX#57478F
RGBrgb(87, 71, 143)
RGB (0–1)0.3412, 0.2784, 0.5608
RGB percentages34.1%, 27.8%, 56.1%
HSLhsl(253.3, 33.6%, 42%)
HSV / HSBhsv(253.3, 50.3%, 56.1%)
CMYK39.2%, 50.3%, 0%, 43.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,719,951
CSS custom property--colour: #57478F;

Brightness & contrast

Relative luminance0.08516WCAG 2.x, 0 is black and 1 is white
Perceived brightness86.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.77:1
Contrast with white7.77:1WCAG normal text: AAA
Contrast with black2.7:1WCAG normal text: Fail
Greyscale equivalent#505050
Inverted#A8B870

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2B5492no red cones; affects about 1% of men; ΔE 17.4 from the original
Deuteranopia#2D518Dno green cones; the most common form, about 1% of men; ΔE 16.9 from the original
Tritanopia#495564no blue cones; rare, and affects men and women equally; ΔE 37.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.77:1WCAG large text: AAA
Contrast with black, large text2.7:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 6.2Rebecca purple · ΔE 20.6Midnight blue · ΔE 23.6Slate blue · ΔE 25.2Medium purple · ΔE 26.4Royal blue · ΔE 30.4
Nearest named CSS colourDark slateblue (#483D8B)ΔE 6.21, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7F8F47
Analogous#475B8F, #7B478F
Triadic#8F5747, #478F57
Split complementary#8F7B47, #5B8F47
Tetradic#8F475B, #7F8F47, #478F7B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C8C2E0
Lighter +30%#AA9FD0
Lighter +20%#8C7DBF
Lighter +10%#6E5BAE
Darker −10%#42366D
Darker −20%#2E254B
Darker −30%#191429
Darker −40%#040307
More saturated +25%#482CAA
Less saturated −25%#666274

Channel breakdown

R87
G71
B143
Red87 (34.1%)
Green71 (27.8%)
Blue143 (56.1%)
Hue253.33°
Saturation (HSL)33.64%
Lightness41.96%
Dominant channelBlue
Hex per channelR 57 · G 47 · B 8F

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Every value on this page was computed from “57478f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.