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Recognised as Colour

#333F4A

  • #333F4A
  • Blue
  • Dark
  • Nearest: Dark slate grey

#333F4A is a blue with RGB values 51, 63, 74 and HSL 209°, 18%, 25%. It is a dark colour, so white text on it reaches 10.8:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#333F4A#333F4A
HEX#333F4A
RGBrgb(51, 63, 74)
RGB (0–1)0.2, 0.2471, 0.2902
RGB percentages20%, 24.7%, 29%
HSLhsl(208.7, 18.4%, 24.5%)
HSV / HSBhsv(208.7, 31.1%, 29%)
CMYK31.1%, 14.9%, 0%, 71%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,358,538
CSS custom property--colour: #333F4A;

Brightness & contrast

Relative luminance0.04753WCAG 2.x, 0 is black and 1 is white
Perceived brightness61.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.77:1
Contrast with white10.77:1WCAG normal text: AAA
Contrast with black1.95:1WCAG normal text: Fail
Greyscale equivalent#3D3D3D
Inverted#CCC0B5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3B3F4Bno red cones; affects about 1% of men; ΔE 3.3 from the original
Deuteranopia#383D4Ano green cones; the most common form, about 1% of men; ΔE 3.2 from the original
Tritanopia#2C4243no blue cones; rare, and affects men and women equally; ΔE 8.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.77:1WCAG large text: AAA
Contrast with black, large text1.95:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 12Dim grey · ΔE 20.3Slate grey · ΔE 26.9Black · ΔE 27.4Gray · ΔE 28.8Light slate grey · ΔE 30
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 12.05, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4A3E33
Analogous#334A4A, #33344A
Triadic#4A333F, #3F4A33
Split complementary#4A3334, #4A4A33
Tetradic#4A334A, #4A3E33, #334A33

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#94A5B5
Lighter +30%#768CA0
Lighter +20%#5D7286
Lighter +10%#485968
Darker −10%#1E252C
Darker −20%#090C0E
Darker −30%#000000
Darker −40%#000000
More saturated +25%#23405A
Less saturated −25%#3F3F3F

Channel breakdown

R51
G63
B74
Red51 (20%)
Green63 (24.7%)
Blue74 (29%)
Hue208.7°
Saturation (HSL)18.4%
Lightness24.51%
Dominant channelBlue
Hex per channelR 33 · G 3F · B 4A

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Every value on this page was computed from “333f4a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.