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Recognised as Colour

#4073B7

  • #4073B7
  • Blue
  • Dark
  • Nearest: Steel blue

#4073B7 is a blue with RGB values 64, 115, 183 and HSL 214°, 48%, 48%. It is a dark colour, so white text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#4073B7#4073B7
HEX#4073B7
RGBrgb(64, 115, 183)
RGB (0–1)0.251, 0.451, 0.7176
RGB percentages25.1%, 45.1%, 71.8%
HSLhsl(214.3, 48.2%, 48.4%)
HSV / HSBhsv(214.3, 65%, 71.8%)
CMYK65%, 37.2%, 0%, 28.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,223,927
CSS custom property--colour: #4073B7;

Brightness & contrast

Relative luminance0.1677WCAG 2.x, 0 is black and 1 is white
Perceived brightness113.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.82:1
Contrast with white4.82:1WCAG normal text: AA
Contrast with black4.35:1WCAG normal text: Fail
Greyscale equivalent#6D6D6D
Inverted#BF8C48

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5578BAno red cones; affects about 1% of men; ΔE 4.2 from the original
Deuteranopia#446DB6no green cones; the most common form, about 1% of men; ΔE 4.8 from the original
Tritanopia#00838Cno blue cones; rare, and affects men and women equally; ΔE 41.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.82:1WCAG large text: AAA
Contrast with black, large text4.35:1WCAG large text: AA

Named colours

Steel blue · ΔE 13.3Cornflower blue · ΔE 16.8Dodgerblue · ΔE 25.6Dark slateblue · ΔE 27.3Slate grey · ΔE 31.6Light slate grey · ΔE 31.7
Nearest named CSS colourSteel blue (#4682B4)ΔE 13.31, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B78440
Analogous#40AFB7, #4840B7
Triadic#B74073, #73B740
Split complementary#B74840, #AFB740
Tetradic#B740AF, #B78440, #40B748

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D3DFF0
Lighter +30%#AEC4E2
Lighter +20%#88A9D5
Lighter +10%#628EC8
Darker −10%#335B91
Darker −20%#26446B
Darker −30%#182C46
Darker −40%#0B1420
More saturated +25%#216FD6
Less saturated −25%#5F7798

Channel breakdown

R64
G115
B183
Red64 (25.1%)
Green115 (45.1%)
Blue183 (71.8%)
Hue214.29°
Saturation (HSL)48.18%
Lightness48.43%
Dominant channelBlue
Hex per channelR 40 · G 73 · B B7

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Every value on this page was computed from “4073b7” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.