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Recognised as Colour

#2F3357

  • #2F3357
  • Blue
  • Dark
  • Nearest: Dark slateblue

#2F3357 is a blue with RGB values 47, 51, 87 and HSL 234°, 30%, 26%. It is a dark colour, so white text on it reaches 12.1:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#2F3357#2F3357
HEX#2F3357
RGBrgb(47, 51, 87)
RGB (0–1)0.1843, 0.2, 0.3412
RGB percentages18.4%, 20%, 34.1%
HSLhsl(234, 29.9%, 26.3%)
HSV / HSBhsv(234, 46%, 34.1%)
CMYK46%, 41.4%, 0%, 65.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,093,335
CSS custom property--colour: #2F3357;

Brightness & contrast

Relative luminance0.0366WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.12:1
Contrast with white12.12:1WCAG normal text: AAA
Contrast with black1.73:1WCAG normal text: Fail
Greyscale equivalent#353535
Inverted#D0CCA8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#263758no red cones; affects about 1% of men; ΔE 5 from the original
Deuteranopia#233456no green cones; the most common form, about 1% of men; ΔE 4.5 from the original
Tritanopia#223A40no blue cones; rare, and affects men and women equally; ΔE 22.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.12:1WCAG large text: AAA
Contrast with black, large text1.73:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 27.4Dark slate grey · ΔE 29.2Dim grey · ΔE 32.5Black · ΔE 33Steel blue · ΔE 34.1Slate grey · ΔE 34.4
Nearest named CSS colourDark slateblue (#483D8B)ΔE 27.39, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#57532F
Analogous#2F4757, #3F2F57
Triadic#572F33, #33572F
Split complementary#573F2F, #47572F
Tetradic#572F47, #57532F, #2F573F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8F94C3
Lighter +30%#6E75B1
Lighter +20%#535A99
Lighter +10%#414678
Darker −10%#1D2036
Darker −20%#0B0C15
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1E2668
Less saturated −25%#404046

Channel breakdown

R47
G51
B87
Red47 (18.4%)
Green51 (20%)
Blue87 (34.1%)
Hue234°
Saturation (HSL)29.85%
Lightness26.27%
Dominant channelBlue
Hex per channelR 2F · G 33 · B 57

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Every value on this page was computed from “2f3357” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.