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Recognised as Colour

#2857AF

  • #2857AF
  • Blue
  • Dark
  • Nearest: Dark slateblue

#2857AF is a blue with RGB values 40, 87, 175 and HSL 219°, 63%, 42%. It is a dark colour, so white text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#2857AF#2857AF
HEX#2857AF
RGBrgb(40, 87, 175)
RGB (0–1)0.1569, 0.3412, 0.6863
RGB percentages15.7%, 34.1%, 68.6%
HSLhsl(219.1, 62.8%, 42.2%)
HSV / HSBhsv(219.1, 77.1%, 68.6%)
CMYK77.1%, 50.3%, 0%, 31.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,643,887
CSS custom property--colour: #2857AF;

Brightness & contrast

Relative luminance0.10363WCAG 2.x, 0 is black and 1 is white
Perceived brightness91.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.83:1
Contrast with white6.83:1WCAG normal text: AA
Contrast with black3.07:1WCAG normal text: Fail
Greyscale equivalent#535353
Inverted#D7A850

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2261B2no red cones; affects about 1% of men; ΔE 7.3 from the original
Deuteranopia#0055ADno green cones; the most common form, about 1% of men; ΔE 3 from the original
Tritanopia#006C7Ano blue cones; rare, and affects men and women equally; ΔE 51.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.83:1WCAG large text: AAA
Contrast with black, large text3.07:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 15.7Royal blue · ΔE 19.4Slate blue · ΔE 22Cornflower blue · ΔE 24.5Dodgerblue · ΔE 24.8Medium purple · ΔE 26.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 15.71, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AF8028
Analogous#289BAF, #3C28AF
Triadic#AF2857, #57AF28
Split complementary#AF3C28, #9BAF28
Tetradic#AF289B, #AF8028, #28AF3C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B5C9EE
Lighter +30%#8BAAE5
Lighter +20%#628CDB
Lighter +10%#386ED2
Darker −10%#1F4285
Darker −20%#152E5C
Darker −30%#0C1932
Darker −40%#020409
More saturated +25%#0D4FCA
Less saturated −25%#435F94

Channel breakdown

R40
G87
B175
Red40 (15.7%)
Green87 (34.1%)
Blue175 (68.6%)
Hue219.11°
Saturation (HSL)62.79%
Lightness42.16%
Dominant channelBlue
Hex per channelR 28 · G 57 · B AF

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Every value on this page was computed from “2857af” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.