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Recognised as Colour

#284A8E

  • #284A8E
  • Blue
  • Dark
  • Nearest: Dark slateblue

#284A8E is a blue with RGB values 40, 74, 142 and HSL 220°, 56%, 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

#284A8E#284A8E
HEX#284A8E
RGBrgb(40, 74, 142)
RGB (0–1)0.1569, 0.2902, 0.5569
RGB percentages15.7%, 29%, 55.7%
HSLhsl(220, 56%, 35.7%)
HSV / HSBhsv(220, 71.8%, 55.7%)
CMYK71.8%, 47.9%, 0%, 44.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,640,526
CSS custom property--colour: #284A8E;

Brightness & contrast

Relative luminance0.07302WCAG 2.x, 0 is black and 1 is white
Perceived brightness77.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.54:1
Contrast with white8.54:1WCAG normal text: AAA
Contrast with black2.46:1WCAG normal text: Fail
Greyscale equivalent#484848
Inverted#D7B571

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#275191no red cones; affects about 1% of men; ΔE 4.6 from the original
Deuteranopia#10488Dno green cones; the most common form, about 1% of men; ΔE 2.9 from the original
Tritanopia#005A65no blue cones; rare, and affects men and women equally; ΔE 41.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.54:1WCAG large text: AAA
Contrast with black, large text2.46:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 14.2Midnight blue · ΔE 27.1Steel blue · ΔE 27.2Cornflower blue · ΔE 30.6Rebecca purple · ΔE 31.4Royal blue · ΔE 31.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 14.17, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8E6C28
Analogous#287D8E, #39288E
Triadic#8E284A, #4A8E28
Split complementary#8E3928, #7D8E28
Tetradic#8E287D, #8E6C28, #288E39

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9EB5E4
Lighter +30%#7697D9
Lighter +20%#4F79CD
Lighter +10%#335FB6
Darker −10%#1D3566
Darker −20%#12213E
Darker −30%#060C17
Darker −40%#000000
More saturated +25%#1142A5
Less saturated −25%#3F5277

Channel breakdown

R40
G74
B142
Red40 (15.7%)
Green74 (29%)
Blue142 (55.7%)
Hue220°
Saturation (HSL)56.04%
Lightness35.69%
Dominant channelBlue
Hex per channelR 28 · G 4A · B 8E

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Every value on this page was computed from “284a8e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.