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Recognised as Colour

#40517B

  • #40517B
  • Blue
  • Dark
  • Nearest: Steel blue

#40517B is a blue with RGB values 64, 81, 123 and HSL 223°, 32%, 37%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Steel blue.

Colour values

#40517B#40517B
HEX#40517B
RGBrgb(64, 81, 123)
RGB (0–1)0.251, 0.3176, 0.4824
RGB percentages25.1%, 31.8%, 48.2%
HSLhsl(222.7, 31.6%, 36.7%)
HSV / HSBhsv(222.7, 48%, 48.2%)
CMYK48%, 34.1%, 0%, 51.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,215,163
CSS custom property--colour: #40517B;

Brightness & contrast

Relative luminance0.08405WCAG 2.x, 0 is black and 1 is white
Perceived brightness82.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.83:1
Contrast with white7.83:1WCAG normal text: AAA
Contrast with black2.68:1WCAG normal text: Fail
Greyscale equivalent#505050
Inverted#BFAE84

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#42557Dno red cones; affects about 1% of men; ΔE 2.2 from the original
Deuteranopia#3C4F7Ano green cones; the most common form, about 1% of men; ΔE 1.2 from the original
Tritanopia#295A60no blue cones; rare, and affects men and women equally; ΔE 26.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.83:1WCAG large text: AAA
Contrast with black, large text2.68:1WCAG large text: Fail

Named colours

Steel blue · ΔE 21.1Slate grey · ΔE 24.9Dark slateblue · ΔE 26.3Light slate grey · ΔE 27Dim grey · ΔE 28.2Dark slate grey · ΔE 28.4
Nearest named CSS colourSteel blue (#4682B4)ΔE 21.15, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7B6A40
Analogous#406E7B, #4D407B
Triadic#7B4051, #517B40
Split complementary#7B4D40, #6E7B40
Tetradic#7B406E, #7B6A40, #407B4D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B1BCD6
Lighter +30%#8F9FC5
Lighter +20%#6E82B3
Lighter +10%#51679D
Darker −10%#2F3B59
Darker −20%#1D2538
Darker −30%#0C0F16
Darker −40%#000000
More saturated +25%#294792
Less saturated −25%#575B64

Channel breakdown

R64
G81
B123
Red64 (25.1%)
Green81 (31.8%)
Blue123 (48.2%)
Hue222.71°
Saturation (HSL)31.55%
Lightness36.67%
Dominant channelBlue
Hex per channelR 40 · G 51 · B 7B

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Every value on this page was computed from “40517b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.