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Colour

#3057AF

  • #3057AF
  • Blue
  • Dark
  • Nearest: Dark slateblue

#3057AF is a blue with RGB values 48, 87, 175 and HSL 222°, 57%, 44%. 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

#3057AF#3057AF
HEX#3057AF
RGBrgb(48, 87, 175)
RGB (0–1)0.1882, 0.3412, 0.6863
RGB percentages18.8%, 34.1%, 68.6%
HSLhsl(221.6, 57%, 43.7%)
HSV / HSBhsv(221.6, 72.6%, 68.6%)
CMYK72.6%, 50.3%, 0%, 31.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,168,175
CSS custom property--colour: #3057AF;

Brightness & contrast

Relative luminance0.1054WCAG 2.x, 0 is black and 1 is white
Perceived brightness92.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.76:1
Contrast with white6.76:1WCAG normal text: AA
Contrast with black3.11:1WCAG normal text: Fail
Greyscale equivalent#555555
Inverted#CFA850

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2362B2no red cones; affects about 1% of men; ΔE 8.7 from the original
Deuteranopia#0056ADno green cones; the most common form, about 1% of men; ΔE 4.5 from the original
Tritanopia#006C7Ano blue cones; rare, and affects men and women equally; ΔE 52.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.76:1WCAG large text: AAA
Contrast with black, large text3.11:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 14.9Royal blue · ΔE 19.2Slate blue · ΔE 21.1Cornflower blue · ΔE 24.5Dodgerblue · ΔE 25.1Medium purple · ΔE 25.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 14.92, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AF8830
Analogous#3097AF, #4830AF
Triadic#AF3057, #57AF30
Split complementary#AF4830, #97AF30
Tetradic#AF3097, #AF8830, #30AF48

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BECCED
Lighter +30%#96ADE2
Lighter +20%#6E8ED7
Lighter +10%#466FCC
Darker −10%#254387
Darker −20%#1A2F5F
Darker −30%#0F1B37
Darker −40%#04070F
More saturated +25%#144CCB
Less saturated −25%#4C6293

Channel breakdown

R48
G87
B175
Red48 (18.8%)
Green87 (34.1%)
Blue175 (68.6%)
Hue221.57°
Saturation (HSL)56.95%
Lightness43.73%
Dominant channelBlue
Hex per channelR 30 · G 57 · B AF

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Every value on this page was computed from “3057af” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.