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Recognised as Colour

#356DB3

  • #356DB3
  • Blue
  • Dark
  • Nearest: Steel blue

#356DB3 is a blue with RGB values 53, 109, 179 and HSL 213°, 54%, 45%. It is a dark colour, so white text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#356DB3#356DB3
HEX#356DB3
RGBrgb(53, 109, 179)
RGB (0–1)0.2078, 0.4275, 0.702
RGB percentages20.8%, 42.7%, 70.2%
HSLhsl(213.3, 54.3%, 45.5%)
HSV / HSBhsv(213.3, 70.4%, 70.2%)
CMYK70.4%, 39.1%, 0%, 29.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,501,491
CSS custom property--colour: #356DB3;

Brightness & contrast

Relative luminance0.14949WCAG 2.x, 0 is black and 1 is white
Perceived brightness107.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.26:1
Contrast with white5.26:1WCAG normal text: AA
Contrast with black3.99:1WCAG normal text: Fail
Greyscale equivalent#666666
Inverted#CA924C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4D72B6no red cones; affects about 1% of men; ΔE 4.4 from the original
Deuteranopia#3A66B2no green cones; the most common form, about 1% of men; ΔE 5.7 from the original
Tritanopia#007D87no 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 text5.26:1WCAG large text: AAA
Contrast with black, large text3.99:1WCAG large text: AA

Named colours

Steel blue · ΔE 15.6Cornflower blue · ΔE 18.2Dodgerblue · ΔE 25.4Dark slateblue · ΔE 25.5Royal blue · ΔE 31Slate grey · ΔE 33.6
Nearest named CSS colourSteel blue (#4682B4)ΔE 15.56, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B37B35
Analogous#35ACB3, #3C35B3
Triadic#B3356D, #6DB335
Split complementary#B33C35, #ACB335
Tetradic#B335AC, #B37B35, #35B33C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C6D8EE
Lighter +30%#9FBDE2
Lighter +20%#77A2D7
Lighter +10%#5087CB
Darker −10%#29558C
Darker −20%#1E3D64
Darker −30%#12253D
Darker −40%#060D16
More saturated +25%#186AD0
Less saturated −25%#527096

Channel breakdown

R53
G109
B179
Red53 (20.8%)
Green109 (42.7%)
Blue179 (70.2%)
Hue213.33°
Saturation (HSL)54.31%
Lightness45.49%
Dominant channelBlue
Hex per channelR 35 · G 6D · B B3

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Every value on this page was computed from “356db3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.