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Recognised as Colour

#407DD8

  • #407DD8
  • Blue
  • Dark
  • Nearest: Cornflower blue

#407DD8 is a blue with RGB values 64, 125, 216 and HSL 216°, 66%, 55%. It is a dark colour, so black text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#407DD8#407DD8
HEX#407DD8
RGBrgb(64, 125, 216)
RGB (0–1)0.251, 0.4902, 0.8471
RGB percentages25.1%, 49%, 84.7%
HSLhsl(215.9, 66.1%, 54.9%)
HSV / HSBhsv(215.9, 70.4%, 84.7%)
CMYK70.4%, 42.1%, 0%, 15.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,226,520
CSS custom property--colour: #407DD8;

Brightness & contrast

Relative luminance0.20715WCAG 2.x, 0 is black and 1 is white
Perceived brightness125.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.14:1
Contrast with white4.08:1WCAG normal text: Fail
Contrast with black5.14:1WCAG normal text: AA
Greyscale equivalent#777777
Inverted#BF8227

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5185DCno red cones; affects about 1% of men; ΔE 4.3 from the original
Deuteranopia#3777D6no green cones; the most common form, about 1% of men; ΔE 3.6 from the original
Tritanopia#0092A0no blue cones; rare, and affects men and women equally; ΔE 52 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.08:1WCAG large text: AA
Contrast with black, large text5.14:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 9.9Dodgerblue · ΔE 12.9Royal blue · ΔE 20.9Steel blue · ΔE 24.9Medium purple · ΔE 26.6Slate blue · ΔE 27.2
Nearest named CSS colourCornflower blue (#6495ED)ΔE 9.87, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D89B40
Analogous#40C9D8, #4F40D8
Triadic#D8407D, #7DD840
Split complementary#D84F40, #C9D840
Tetradic#D840C9, #D89B40, #40D84F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E9F0FB
Lighter +30%#BFD3F2
Lighter +20%#95B7E9
Lighter +10%#6A9AE1
Darker −10%#2764BE
Darker −20%#1E4D94
Darker −30%#163769
Darker −40%#0D213F
More saturated +25%#2377F5
Less saturated −25%#5D83BB

Channel breakdown

R64
G125
B216
Red64 (25.1%)
Green125 (49%)
Blue216 (84.7%)
Hue215.92°
Saturation (HSL)66.09%
Lightness54.9%
Dominant channelBlue
Hex per channelR 40 · G 7D · B D8

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Every value on this page was computed from “407dd8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.