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Recognised as Colour

#39578B

  • #39578B
  • Blue
  • Dark
  • Nearest: Steel blue

#39578B is a blue with RGB values 57, 87, 139 and HSL 218°, 42%, 38%. It is a dark colour, so white text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Steel blue.

Colour values

#39578B#39578B
HEX#39578B
RGBrgb(57, 87, 139)
RGB (0–1)0.2235, 0.3412, 0.5451
RGB percentages22.4%, 34.1%, 54.5%
HSLhsl(218, 41.8%, 38.4%)
HSV / HSBhsv(218, 59%, 54.5%)
CMYK59%, 37.4%, 0%, 45.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,757,963
CSS custom property--colour: #39578B;

Brightness & contrast

Relative luminance0.0955WCAG 2.x, 0 is black and 1 is white
Perceived brightness87.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.22:1
Contrast with white7.22:1WCAG normal text: AAA
Contrast with black2.91:1WCAG normal text: Fail
Greyscale equivalent#545454
Inverted#C6A874

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#415B8Dno red cones; affects about 1% of men; ΔE 2.4 from the original
Deuteranopia#37548Ano green cones; the most common form, about 1% of men; ΔE 1.9 from the original
Tritanopia#00636Ano blue cones; rare, and affects men and women equally; ΔE 34.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.22:1WCAG large text: AAA
Contrast with black, large text2.91:1WCAG large text: Fail

Named colours

Steel blue · ΔE 18.2Dark slateblue · ΔE 23.6Slate grey · ΔE 27.9Light slate grey · ΔE 29.4Cornflower blue · ΔE 30.4Dim grey · ΔE 33.6
Nearest named CSS colourSteel blue (#4682B4)ΔE 18.2, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8B6D39
Analogous#39808B, #44398B
Triadic#8B3957, #578B39
Split complementary#8B4439, #808B39
Tetradic#8B3980, #8B6D39, #398B44

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B1C2DF
Lighter +30%#8DA5D0
Lighter +20%#6989C1
Lighter +10%#486EAF
Darker −10%#2A4067
Darker −20%#1B2A43
Darker −30%#0D131E
Darker −40%#000000
More saturated +25%#2050A3
Less saturated −25%#525E72

Channel breakdown

R57
G87
B139
Red57 (22.4%)
Green87 (34.1%)
Blue139 (54.5%)
Hue218.05°
Saturation (HSL)41.84%
Lightness38.43%
Dominant channelBlue
Hex per channelR 39 · G 57 · B 8B

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Every value on this page was computed from “39578b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.