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Recognised as Colour

#42404D

  • #42404D
  • Blue
  • Dark
  • Nearest: Dark slate grey

#42404D is a blue with RGB values 66, 64, 77 and HSL 249°, 9%, 28%. It is a dark colour, so white text on it reaches 10.1:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#42404D#42404D
HEX#42404D
RGBrgb(66, 64, 77)
RGB (0–1)0.2588, 0.251, 0.302
RGB percentages25.9%, 25.1%, 30.2%
HSLhsl(249.2, 9.2%, 27.6%)
HSV / HSBhsv(249.2, 16.9%, 30.2%)
CMYK14.3%, 16.9%, 0%, 69.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,341,837
CSS custom property--colour: #42404D;

Brightness & contrast

Relative luminance0.05361WCAG 2.x, 0 is black and 1 is white
Perceived brightness66.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.13:1
Contrast with white10.13:1WCAG normal text: AAA
Contrast with black2.07:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#BDBFB2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3D424Eno red cones; affects about 1% of men; ΔE 3 from the original
Deuteranopia#3D414Dno green cones; the most common form, about 1% of men; ΔE 2.6 from the original
Tritanopia#404244no blue cones; rare, and affects men and women equally; ΔE 7.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.13:1WCAG large text: AAA
Contrast with black, large text2.07:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 16.5Dim grey · ΔE 18.7Slate grey · ΔE 26Gray · ΔE 27.2Black · ΔE 29Light slate grey · ΔE 29.1
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 16.47, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4B4D40
Analogous#40444D, #49404D
Triadic#4D4240, #404D42
Split complementary#4D4940, #444D40
Tetradic#4D4044, #4B4D40, #404D49

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A7A5B4
Lighter +30%#8C899D
Lighter +20%#726E85
Lighter +10%#5A5769
Darker −10%#2A2931
Darker −20%#121215
Darker −30%#000000
Darker −40%#000000
More saturated +25%#362E5F
Less saturated −25%#474747

Channel breakdown

R66
G64
B77
Red66 (25.9%)
Green64 (25.1%)
Blue77 (30.2%)
Hue249.23°
Saturation (HSL)9.22%
Lightness27.65%
Dominant channelBlue
Hex per channelR 42 · G 40 · B 4D

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Every value on this page was computed from “42404d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.