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Recognised as Colour

#366CA9

  • #366CA9
  • Blue
  • Dark
  • Nearest: Steel blue

#366CA9 is a blue with RGB values 54, 108, 169 and HSL 212°, 52%, 44%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#366CA9#366CA9
HEX#366CA9
RGBrgb(54, 108, 169)
RGB (0–1)0.2118, 0.4235, 0.6627
RGB percentages21.2%, 42.4%, 66.3%
HSLhsl(211.8, 51.6%, 43.7%)
HSV / HSBhsv(211.8, 68%, 66.3%)
CMYK68%, 36.1%, 0%, 33.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,566,761
CSS custom property--colour: #366CA9;

Brightness & contrast

Relative luminance0.14374WCAG 2.x, 0 is black and 1 is white
Perceived brightness104.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.42:1
Contrast with white5.42:1WCAG normal text: AA
Contrast with black3.87:1WCAG normal text: Fail
Greyscale equivalent#656565
Inverted#C99356

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5170ACno red cones; affects about 1% of men; ΔE 5.4 from the original
Deuteranopia#4165A8no green cones; the most common form, about 1% of men; ΔE 6.6 from the original
Tritanopia#007A82no blue cones; rare, and affects men and women equally; ΔE 37.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.42:1WCAG large text: AAA
Contrast with black, large text3.87:1WCAG large text: AA

Named colours

Steel blue · ΔE 11.6Cornflower blue · ΔE 21.7Dark slateblue · ΔE 27.7Slate grey · ΔE 28.9Light slate grey · ΔE 29.4Dodgerblue · ΔE 30.3
Nearest named CSS colourSteel blue (#4682B4)ΔE 11.61, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A97336
Analogous#36A5A9, #3A36A9
Triadic#A9366C, #6CA936
Split complementary#A93A36, #A5A936
Tetradic#A936A5, #A97336, #36A93A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C0D4EB
Lighter +30%#99BADF
Lighter +20%#73A0D2
Lighter +10%#4C85C6
Darker −10%#2A5382
Darker −20%#1D3B5C
Darker −30%#112235
Darker −40%#05090E
More saturated +25%#1A6AC5
Less saturated −25%#526E8D

Channel breakdown

R54
G108
B169
Red54 (21.2%)
Green108 (42.4%)
Blue169 (66.3%)
Hue211.83°
Saturation (HSL)51.57%
Lightness43.73%
Dominant channelBlue
Hex per channelR 36 · G 6C · B A9

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Every value on this page was computed from “366ca9” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.