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Colour

#285AA4

  • #285AA4
  • Blue
  • Dark
  • Nearest: Dark slateblue

#285AA4 is a blue with RGB values 40, 90, 164 and HSL 216°, 61%, 40%. 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

#285AA4#285AA4
HEX#285AA4
RGBrgb(40, 90, 164)
RGB (0–1)0.1569, 0.3529, 0.6431
RGB percentages15.7%, 35.3%, 64.3%
HSLhsl(215.8, 60.8%, 40%)
HSV / HSBhsv(215.8, 75.6%, 64.3%)
CMYK75.6%, 45.1%, 0%, 35.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,644,644
CSS custom property--colour: #285AA4;

Brightness & contrast

Relative luminance0.10444WCAG 2.x, 0 is black and 1 is white
Perceived brightness91.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.8:1
Contrast with white6.8:1WCAG normal text: AA
Contrast with black3.09:1WCAG normal text: Fail
Greyscale equivalent#555555
Inverted#D7A55B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3461A7no red cones; affects about 1% of men; ΔE 4.1 from the original
Deuteranopia#1B56A3no green cones; the most common form, about 1% of men; ΔE 2.7 from the original
Tritanopia#006B77no blue cones; rare, and affects men and women equally; ΔE 43.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.8:1WCAG large text: AAA
Contrast with black, large text3.09:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 18.1Steel blue · ΔE 23.4Cornflower blue · ΔE 23.7Royal blue · ΔE 27.8Dodgerblue · ΔE 27.9Slate blue · ΔE 29.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 18.15, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A47228
Analogous#2898A4, #3428A4
Triadic#A4285A, #5AA428
Split complementary#A43428, #98A428
Tetradic#A42898, #A47228, #28A434

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ADC6EB
Lighter +30%#84AAE1
Lighter +20%#5B8DD7
Lighter +10%#3271CD
Darker −10%#1E447B
Darker −20%#142D52
Darker −30%#0A1729
Darker −40%#000000
More saturated +25%#0F55BE
Less saturated −25%#425F8B

Channel breakdown

R40
G90
B164
Red40 (15.7%)
Green90 (35.3%)
Blue164 (64.3%)
Hue215.81°
Saturation (HSL)60.78%
Lightness40%
Dominant channelBlue
Hex per channelR 28 · G 5A · B A4

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Every value on this page was computed from “285aa4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.