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Recognised as Colour

#4583B5

  • #4583B5
  • Blue
  • Dark
  • Nearest: Steel blue

#4583B5 is a blue with RGB values 69, 131, 181 and HSL 207°, 45%, 49%. It is a dark colour, so black text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#4583B5#4583B5
HEX#4583B5
RGBrgb(69, 131, 181)
RGB (0–1)0.2706, 0.5137, 0.7098
RGB percentages27.1%, 51.4%, 71%
HSLhsl(206.8, 44.8%, 49%)
HSV / HSBhsv(206.8, 61.9%, 71%)
CMYK61.9%, 27.6%, 0%, 29%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,555,701
CSS custom property--colour: #4583B5;

Brightness & contrast

Relative luminance0.20834WCAG 2.x, 0 is black and 1 is white
Perceived brightness123.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.17:1
Contrast with white4.06:1WCAG normal text: Fail
Contrast with black5.17:1WCAG normal text: AA
Greyscale equivalent#797979
Inverted#BA7C4A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6D84B7no red cones; affects about 1% of men; ΔE 10.2 from the original
Deuteranopia#5E79B4no green cones; the most common form, about 1% of men; ΔE 11.5 from the original
Tritanopia#008F94no blue cones; rare, and affects men and women equally; ΔE 32.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.06:1WCAG large text: AA
Contrast with black, large text5.17:1WCAG large text: AAA

Named colours

Steel blue · ΔE 0.5Light slate grey · ΔE 21.5Slate grey · ΔE 21.9Cornflower blue · ΔE 23.8Deep skyblue · ΔE 25.9Light skyblue · ΔE 27.9
Nearest named CSS colourSteel blue (#4682B4)ΔE 0.55, indistinguishable to the eye
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B57745
Analogous#45B5AF, #454BB5
Triadic#B54583, #83B545
Split complementary#B5454B, #B5AF45
Tetradic#AF45B5, #B57745, #4BB545

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D6E4F0
Lighter +30%#B2CCE1
Lighter +20%#8DB4D3
Lighter +10%#689CC5
Darker −10%#376890
Darker −20%#294E6B
Darker −30%#1B3346
Darker −40%#0D1821
More saturated +25%#2686D4
Less saturated −25%#648096

Channel breakdown

R69
G131
B181
Red69 (27.1%)
Green131 (51.4%)
Blue181 (71%)
Hue206.79°
Saturation (HSL)44.8%
Lightness49.02%
Dominant channelBlue
Hex per channelR 45 · G 83 · B B5

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Every value on this page was computed from “4583b5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.