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Recognised as Colour

#4B555B

  • #4B555B
  • Blue
  • Dark
  • Nearest: Dark slate grey

#4B555B is a blue with RGB values 75, 85, 91 and HSL 203°, 10%, 33%. It is a dark colour, so white text on it reaches 7.6:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#4B555B#4B555B
HEX#4B555B
RGBrgb(75, 85, 91)
RGB (0–1)0.2941, 0.3333, 0.3569
RGB percentages29.4%, 33.3%, 35.7%
HSLhsl(202.5, 9.6%, 32.5%)
HSV / HSBhsv(202.5, 17.6%, 35.7%)
CMYK17.6%, 6.6%, 0%, 64.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,937,051
CSS custom property--colour: #4B555B;

Brightness & contrast

Relative luminance0.08748WCAG 2.x, 0 is black and 1 is white
Perceived brightness82.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.64:1
Contrast with white7.64:1WCAG normal text: AAA
Contrast with black2.75:1WCAG normal text: Fail
Greyscale equivalent#535353
Inverted#B4AAA4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#52555Bno red cones; affects about 1% of men; ΔE 2.9 from the original
Deuteranopia#50535Bno green cones; the most common form, about 1% of men; ΔE 3.1 from the original
Tritanopia#475757no blue cones; rare, and affects men and women equally; ΔE 4.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.64:1WCAG large text: AAA
Contrast with black, large text2.75:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 10.2Dim grey · ΔE 10.4Slate grey · ΔE 18.3Gray · ΔE 18.9Light slate grey · ΔE 21.4Teal · ΔE 29.5
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 10.22, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5B514B
Analogous#4B5B59, #4B4D5B
Triadic#5B4B55, #555B4B
Split complementary#5B4B4D, #5B594B
Tetradic#594B5B, #5B514B, #4D5B4B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B2BBC0
Lighter +30%#96A2A9
Lighter +20%#7A8992
Lighter +10%#626F77
Darker −10%#343B3F
Darker −20%#1D2123
Darker −30%#060707
Darker −40%#000000
More saturated +25%#365A70
Less saturated −25%#535353

Channel breakdown

R75
G85
B91
Red75 (29.4%)
Green85 (33.3%)
Blue91 (35.7%)
Hue202.5°
Saturation (HSL)9.64%
Lightness32.55%
Dominant channelBlue
Hex per channelR 4B · G 55 · B 5B

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Every value on this page was computed from “4b555b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.