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Colour

#284C85

  • #284C85
  • Blue
  • Dark
  • Nearest: Dark slateblue

#284C85 is a blue with RGB values 40, 76, 133 and HSL 217°, 54%, 34%. 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

#284C85#284C85
HEX#284C85
RGBrgb(40, 76, 133)
RGB (0–1)0.1569, 0.298, 0.5216
RGB percentages15.7%, 29.8%, 52.2%
HSLhsl(216.8, 53.8%, 33.9%)
HSV / HSBhsv(216.8, 69.9%, 52.2%)
CMYK69.9%, 42.9%, 0%, 47.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,641,029
CSS custom property--colour: #284C85;

Brightness & contrast

Relative luminance0.07313WCAG 2.x, 0 is black and 1 is white
Perceived brightness76.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.53:1
Contrast with white8.53:1WCAG normal text: AAA
Contrast with black2.46:1WCAG normal text: Fail
Greyscale equivalent#484848
Inverted#D7B37A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#315187no red cones; affects about 1% of men; ΔE 3.1 from the original
Deuteranopia#234884no green cones; the most common form, about 1% of men; ΔE 2.8 from the original
Tritanopia#005962no blue cones; rare, and affects men and women equally; ΔE 35.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.53:1WCAG large text: AAA
Contrast with black, large text2.46:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 20Steel blue · ΔE 23.2Cornflower blue · ΔE 32.4Midnight blue · ΔE 32.7Slate grey · ΔE 33.7Light slate grey · ΔE 35.3
Nearest named CSS colourDark slateblue (#483D8B)ΔE 19.96, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#856128
Analogous#287B85, #322885
Triadic#85284C, #4C8528
Split complementary#853228, #7B8528
Tetradic#85287B, #856128, #288532

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#99B4E0
Lighter +30%#7298D4
Lighter +20%#4A7BC9
Lighter +10%#3462AC
Darker −10%#1C365E
Darker −20%#101F37
Darker −30%#05090F
Darker −40%#000000
More saturated +25%#12479B
Less saturated −25%#3E516F

Channel breakdown

R40
G76
B133
Red40 (15.7%)
Green76 (29.8%)
Blue133 (52.2%)
Hue216.77°
Saturation (HSL)53.76%
Lightness33.92%
Dominant channelBlue
Hex per channelR 28 · G 4C · B 85

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Every value on this page was computed from “284c85” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.