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Recognised as Colour

#284A80

  • #284A80
  • Blue
  • Dark
  • Nearest: Dark slateblue

#284A80 is a blue with RGB values 40, 74, 128 and HSL 217°, 52%, 33%. It is a dark colour, so white text on it reaches 8.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#284A80#284A80
HEX#284A80
RGBrgb(40, 74, 128)
RGB (0–1)0.1569, 0.2902, 0.502
RGB percentages15.7%, 29%, 50.2%
HSLhsl(216.8, 52.4%, 32.9%)
HSV / HSBhsv(216.8, 68.8%, 50.2%)
CMYK68.8%, 42.2%, 0%, 49.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,640,512
CSS custom property--colour: #284A80;

Brightness & contrast

Relative luminance0.06907WCAG 2.x, 0 is black and 1 is white
Perceived brightness74.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.82:1
Contrast with white8.82:1WCAG normal text: AAA
Contrast with black2.38:1WCAG normal text: Fail
Greyscale equivalent#474747
Inverted#D7B57F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#314F82no red cones; affects about 1% of men; ΔE 3.1 from the original
Deuteranopia#24477Fno green cones; the most common form, about 1% of men; ΔE 1.9 from the original
Tritanopia#00565Eno blue cones; rare, and affects men and women equally; ΔE 34.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.82:1WCAG large text: AAA
Contrast with black, large text2.38:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 21Steel blue · ΔE 23.5Slate grey · ΔE 32.9Midnight blue · ΔE 33.4Cornflower blue · ΔE 34Light slate grey · ΔE 34.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 21.01, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#805E28
Analogous#287680, #322880
Triadic#80284A, #4A8028
Split complementary#803228, #768028
Tetradic#802876, #805E28, #288032

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#96B2DE
Lighter +30%#6F95D2
Lighter +20%#4879C6
Lighter +10%#3460A7
Darker −10%#1C3459
Darker −20%#101D32
Darker −30%#04070B
Darker −40%#000000
More saturated +25%#134595
Less saturated −25%#3D4F6B

Channel breakdown

R40
G74
B128
Red40 (15.7%)
Green74 (29%)
Blue128 (50.2%)
Hue216.82°
Saturation (HSL)52.38%
Lightness32.94%
Dominant channelBlue
Hex per channelR 28 · G 4A · B 80

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Every value on this page was computed from “284a80” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.