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Recognised as Colour

#40586B

  • #40586B
  • Blue
  • Dark
  • Nearest: Dark slate grey

#40586B is a blue with RGB values 64, 88, 107 and HSL 207°, 25%, 34%. It is a dark colour, so white text on it reaches 7.4:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#40586B#40586B
HEX#40586B
RGBrgb(64, 88, 107)
RGB (0–1)0.251, 0.3451, 0.4196
RGB percentages25.1%, 34.5%, 42%
HSLhsl(206.5, 25.1%, 33.5%)
HSV / HSBhsv(206.5, 40.2%, 42%)
CMYK40.2%, 17.8%, 0%, 58%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,216,939
CSS custom property--colour: #40586B;

Brightness & contrast

Relative luminance0.09131WCAG 2.x, 0 is black and 1 is white
Perceived brightness84.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.43:1
Contrast with white7.43:1WCAG normal text: AAA
Contrast with black2.83:1WCAG normal text: Fail
Greyscale equivalent#545454
Inverted#BFA794

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#50586Cno red cones; affects about 1% of men; ΔE 5.8 from the original
Deuteranopia#4A536Bno green cones; the most common form, about 1% of men; ΔE 6.5 from the original
Tritanopia#315D5Eno blue cones; rare, and affects men and women equally; ΔE 14 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.43:1WCAG large text: AAA
Contrast with black, large text2.83:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 13.8Dim grey · ΔE 16.4Slate grey · ΔE 17Light slate grey · ΔE 19.9Gray · ΔE 22.5Steel blue · ΔE 24.6
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 13.78, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6B5340
Analogous#406B69, #40436B
Triadic#6B4058, #586B40
Split complementary#6B4043, #6B6940
Tetradic#69406B, #6B5340, #436B40

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ABBDCC
Lighter +30%#8BA5B9
Lighter +20%#6B8CA6
Lighter +10%#53728B
Darker −10%#2D3E4B
Darker −20%#1A242B
Darker −30%#07090B
Darker −40%#000000
More saturated +25%#2B5A80
Less saturated −25%#555656

Channel breakdown

R64
G88
B107
Red64 (25.1%)
Green88 (34.5%)
Blue107 (42%)
Hue206.51°
Saturation (HSL)25.15%
Lightness33.53%
Dominant channelBlue
Hex per channelR 40 · G 58 · B 6B

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Every value on this page was computed from “40586b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.