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Recognised as Colour

#4557AA

  • #4557AA
  • Blue
  • Dark
  • Nearest: Dark slateblue

#4557AA is a blue with RGB values 69, 87, 170 and HSL 229°, 42%, 47%. It is a dark colour, so white text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#4557AA#4557AA
HEX#4557AA
RGBrgb(69, 87, 170)
RGB (0–1)0.2706, 0.3412, 0.6667
RGB percentages27.1%, 34.1%, 66.7%
HSLhsl(229.3, 42.3%, 46.9%)
HSV / HSBhsv(229.3, 59.4%, 66.7%)
CMYK59.4%, 48.8%, 0%, 33.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,544,426
CSS custom property--colour: #4557AA;

Brightness & contrast

Relative luminance0.10984WCAG 2.x, 0 is black and 1 is white
Perceived brightness95.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.57:1
Contrast with white6.57:1WCAG normal text: AA
Contrast with black3.2:1WCAG normal text: Fail
Greyscale equivalent#595959
Inverted#BAA855

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2E62ADno red cones; affects about 1% of men; ΔE 10.3 from the original
Deuteranopia#1D59A8no green cones; the most common form, about 1% of men; ΔE 8.2 from the original
Tritanopia#006A78no blue cones; rare, and affects men and women equally; ΔE 50.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.57:1WCAG large text: AAA
Contrast with black, large text3.2:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 12.2Slate blue · ΔE 21.1Royal blue · ΔE 21.5Medium purple · ΔE 23.8Cornflower blue · ΔE 24.5Rebecca purple · ΔE 24.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 12.21, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AA9845
Analogous#458AAA, #6545AA
Triadic#AA4557, #57AA45
Split complementary#AA6545, #8AAA45
Tetradic#AA458A, #AA9845, #45AA65

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CFD4EC
Lighter +30%#ABB4DD
Lighter +20%#8794CE
Lighter +10%#6373BF
Darker −10%#364486
Darker −20%#283261
Darker −30%#191F3D
Darker −40%#0A0D19
More saturated +25%#2744C8
Less saturated −25%#636A8C

Channel breakdown

R69
G87
B170
Red69 (27.1%)
Green87 (34.1%)
Blue170 (66.7%)
Hue229.31°
Saturation (HSL)42.26%
Lightness46.86%
Dominant channelBlue
Hex per channelR 45 · G 57 · B AA

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Every value on this page was computed from “4557aa” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.