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Colour

#404E5B

  • #404E5B
  • Blue
  • Dark
  • Nearest: Dark slate grey

#404E5B is a blue with RGB values 64, 78, 91 and HSL 209°, 17%, 30%. It is a dark colour, so white text on it reaches 8.5:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#404E5B#404E5B
HEX#404E5B
RGBrgb(64, 78, 91)
RGB (0–1)0.251, 0.3059, 0.3569
RGB percentages25.1%, 30.6%, 35.7%
HSLhsl(208.9, 17.4%, 30.4%)
HSV / HSBhsv(208.9, 29.7%, 35.7%)
CMYK29.7%, 14.3%, 0%, 64.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,214,363
CSS custom property--colour: #404E5B;

Brightness & contrast

Relative luminance0.07294WCAG 2.x, 0 is black and 1 is white
Perceived brightness75.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.54:1
Contrast with white8.54:1WCAG normal text: AAA
Contrast with black2.46:1WCAG normal text: Fail
Greyscale equivalent#4C4C4C
Inverted#BFB1A4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#494E5Cno red cones; affects about 1% of men; ΔE 3.6 from the original
Deuteranopia#464B5Bno green cones; the most common form, about 1% of men; ΔE 4.1 from the original
Tritanopia#385152no blue cones; rare, and affects men and women equally; ΔE 9.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.54:1WCAG large text: AAA
Contrast with black, large text2.46:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 11.3Dim grey · ΔE 15.4Slate grey · ΔE 20.4Gray · ΔE 23.2Light slate grey · ΔE 23.5Steel blue · ΔE 30.4
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 11.26, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5B4D40
Analogous#405B5B, #40405B
Triadic#5B404E, #4E5B40
Split complementary#5B4040, #5B5B40
Tetradic#5B405B, #5B4D40, #405B40

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A6B4C1
Lighter +30%#889BAC
Lighter +20%#6A8197
Lighter +10%#556879
Darker −10%#2B343D
Darker −20%#161B1F
Darker −30%#010101
Darker −40%#000000
More saturated +25%#2D4F6E
Less saturated −25%#4E4E4E

Channel breakdown

R64
G78
B91
Red64 (25.1%)
Green78 (30.6%)
Blue91 (35.7%)
Hue208.89°
Saturation (HSL)17.42%
Lightness30.39%
Dominant channelBlue
Hex per channelR 40 · G 4E · B 5B

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Every value on this page was computed from “404e5b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.