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Colour

#284A90

  • #284A90
  • Blue
  • Dark
  • Nearest: Dark slateblue

#284A90 is a blue with RGB values 40, 74, 144 and HSL 220°, 57%, 36%. It is a dark colour, so white text on it reaches 8.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#284A90#284A90
HEX#284A90
RGBrgb(40, 74, 144)
RGB (0–1)0.1569, 0.2902, 0.5647
RGB percentages15.7%, 29%, 56.5%
HSLhsl(220.4, 56.5%, 36.1%)
HSV / HSBhsv(220.4, 72.2%, 56.5%)
CMYK72.2%, 48.6%, 0%, 43.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,640,528
CSS custom property--colour: #284A90;

Brightness & contrast

Relative luminance0.07362WCAG 2.x, 0 is black and 1 is white
Perceived brightness77.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.49:1
Contrast with white8.49:1WCAG normal text: AAA
Contrast with black2.47:1WCAG normal text: Fail
Greyscale equivalent#484848
Inverted#D7B56F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#255293no red cones; affects about 1% of men; ΔE 5.6 from the original
Deuteranopia#0A488Fno green cones; the most common form, about 1% of men; ΔE 3.3 from the original
Tritanopia#005A66no blue cones; rare, and affects men and women equally; ΔE 42.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.49:1WCAG large text: AAA
Contrast with black, large text2.47:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 13.4Midnight blue · ΔE 26.3Steel blue · ΔE 28Cornflower blue · ΔE 30.3Rebecca purple · ΔE 30.5Royal blue · ΔE 30.6
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.4, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#906E28
Analogous#287E90, #3A2890
Triadic#90284A, #4A9028
Split complementary#903A28, #7E9028
Tetradic#90287E, #906E28, #28903A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A0B6E4
Lighter +30%#7898D9
Lighter +20%#5079CE
Lighter +10%#335FB8
Darker −10%#1D3568
Darker −20%#122140
Darker −30%#070C18
Darker −40%#000000
More saturated +25%#1142A7
Less saturated −25%#3F5279

Channel breakdown

R40
G74
B144
Red40 (15.7%)
Green74 (29%)
Blue144 (56.5%)
Hue220.38°
Saturation (HSL)56.52%
Lightness36.08%
Dominant channelBlue
Hex per channelR 28 · G 4A · B 90

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Every value on this page was computed from “284a90” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.