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Recognised as Colour

#284A55

  • #284A55
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#284A55 is a cyan with RGB values 40, 74, 85 and HSL 195°, 36%, 25%. It is a dark colour, so white text on it reaches 9.5:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#284A55#284A55
HEX#284A55
RGBrgb(40, 74, 85)
RGB (0–1)0.1569, 0.2902, 0.3333
RGB percentages15.7%, 29%, 33.3%
HSLhsl(194.7, 36%, 24.5%)
HSV / HSBhsv(194.7, 52.9%, 33.3%)
CMYK52.9%, 12.9%, 0%, 66.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,640,469
CSS custom property--colour: #284A55;

Brightness & contrast

Relative luminance0.06005WCAG 2.x, 0 is black and 1 is white
Perceived brightness67.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.54:1
Contrast with white9.54:1WCAG normal text: AAA
Contrast with black2.2:1WCAG normal text: Fail
Greyscale equivalent#444444
Inverted#D7B5AA

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#434856no red cones; affects about 1% of men; ΔE 10.5 from the original
Deuteranopia#3D4355no green cones; the most common form, about 1% of men; ΔE 11.2 from the original
Tritanopia#104E4Dno blue cones; rare, and affects men and women equally; ΔE 11.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.54:1WCAG large text: AAA
Contrast with black, large text2.2:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 7.4Dim grey · ΔE 20.3Slate grey · ΔE 24.4Light slate grey · ΔE 27.3Teal · ΔE 27.5Gray · ΔE 27.8
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 7.44, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#553328
Analogous#285549, #283455
Triadic#55284A, #4A5528
Split complementary#552834, #554928
Tetradic#492855, #553328, #345528

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#84B5C5
Lighter +30%#61A0B5
Lighter +20%#49869A
Lighter +10%#386878
Darker −10%#182C32
Darker −20%#070E10
Darker −30%#000000
Darker −40%#000000
More saturated +25%#185265
Less saturated −25%#384245

Channel breakdown

R40
G74
B85
Red40 (15.7%)
Green74 (29%)
Blue85 (33.3%)
Hue194.67°
Saturation (HSL)36%
Lightness24.51%
Dominant channelBlue
Hex per channelR 28 · G 4A · B 55

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Every value on this page was computed from “284a55” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.