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Recognised as Colour

#4057BF

  • #4057BF
  • Blue
  • Dark
  • Nearest: Royal blue

#4057BF is a blue with RGB values 64, 87, 191 and HSL 229°, 50%, 50%. It is a dark colour, so white text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#4057BF#4057BF
HEX#4057BF
RGBrgb(64, 87, 191)
RGB (0–1)0.251, 0.3412, 0.749
RGB percentages25.1%, 34.1%, 74.9%
HSLhsl(229.1, 49.8%, 50%)
HSV / HSBhsv(229.1, 66.5%, 74.9%)
CMYK66.5%, 54.5%, 0%, 25.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,216,767
CSS custom property--colour: #4057BF;

Brightness & contrast

Relative luminance0.11668WCAG 2.x, 0 is black and 1 is white
Perceived brightness99.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.3:1
Contrast with white6.3:1WCAG normal text: AA
Contrast with black3.33:1WCAG normal text: Fail
Greyscale equivalent#5A5A5A
Inverted#BFA840

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0566C3no red cones; affects about 1% of men; ΔE 14 from the original
Deuteranopia#005ABDno green cones; the most common form, about 1% of men; ΔE 8.5 from the original
Tritanopia#007082no blue cones; rare, and affects men and women equally; ΔE 60.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.3:1WCAG large text: AAA
Contrast with black, large text3.33:1WCAG large text: AA

Named colours

Royal blue · ΔE 10.7Slate blue · ΔE 11.6Dark slateblue · ΔE 18.2Medium purple · ΔE 19.7Medium slateblue · ΔE 21Rebecca purple · ΔE 21.7
Nearest named CSS colourRoyal blue (#4169E1)ΔE 10.71, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BFA840
Analogous#4097BF, #6840BF
Triadic#BF4057, #57BF40
Split complementary#BF6840, #97BF40
Tetradic#BF4097, #BFA840, #40BF68

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D9DDF2
Lighter +30%#B3BCE5
Lighter +20%#8C9AD9
Lighter +10%#6679CC
Darker −10%#334699
Darker −20%#263473
Darker −30%#1A234C
Darker −40%#0D1126
More saturated +25%#2043DF
Less saturated −25%#606B9F

Channel breakdown

R64
G87
B191
Red64 (25.1%)
Green87 (34.1%)
Blue191 (74.9%)
Hue229.13°
Saturation (HSL)49.8%
Lightness50%
Dominant channelBlue
Hex per channelR 40 · G 57 · B BF

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Every value on this page was computed from “4057bf” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.