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Recognised as Colour

#4F577A

  • #4F577A
  • Blue
  • Dark
  • Nearest: Slate grey

#4F577A is a blue with RGB values 79, 87, 122 and HSL 229°, 21%, 39%. It is a dark colour, so white text on it reaches 7.1:1 contrast (AAA for normal text). The nearest named colour is Slate grey.

Colour values

#4F577A#4F577A
HEX#4F577A
RGBrgb(79, 87, 122)
RGB (0–1)0.3098, 0.3412, 0.4784
RGB percentages31%, 34.1%, 47.8%
HSLhsl(228.8, 21.4%, 39.4%)
HSV / HSBhsv(228.8, 35.2%, 47.8%)
CMYK35.2%, 28.7%, 0%, 52.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,199,738
CSS custom property--colour: #4F577A;

Brightness & contrast

Relative luminance0.09884WCAG 2.x, 0 is black and 1 is white
Perceived brightness89.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.05:1
Contrast with white7.05:1WCAG normal text: AAA
Contrast with black2.98:1WCAG normal text: Fail
Greyscale equivalent#585858
Inverted#B0A885

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4C5A7Cno red cones; affects about 1% of men; ΔE 2.4 from the original
Deuteranopia#495779no green cones; the most common form, about 1% of men; ΔE 2.2 from the original
Tritanopia#435E63no blue cones; rare, and affects men and women equally; ΔE 20.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.05:1WCAG large text: AAA
Contrast with black, large text2.98:1WCAG large text: Fail

Named colours

Slate grey · ΔE 20.1Steel blue · ΔE 21.2Light slate grey · ΔE 22.3Dim grey · ΔE 22.7Dark slate grey · ΔE 25.4Gray · ΔE 26.9
Nearest named CSS colourSlate grey (#708090)ΔE 20.05, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7A724F
Analogous#4F6C7A, #5D4F7A
Triadic#7A4F57, #577A4F
Split complementary#7A5D4F, #6C7A4F
Tetradic#7A4F6C, #7A724F, #4F7A5D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BFC3D6
Lighter +30%#A0A7C2
Lighter +20%#818AAE
Lighter +10%#636D99
Darker −10%#3B415B
Darker −20%#272B3C
Darker −30%#13151D
Darker −40%#000000
More saturated +25%#364793
Less saturated −25%#656565

Channel breakdown

R79
G87
B122
Red79 (31%)
Green87 (34.1%)
Blue122 (47.8%)
Hue228.84°
Saturation (HSL)21.39%
Lightness39.41%
Dominant channelBlue
Hex per channelR 4F · G 57 · B 7A

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Every value on this page was computed from “4f577a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.