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Recognised as Colour

#2F4F8A

  • #2F4F8A
  • Blue
  • Dark
  • Nearest: Dark slateblue

#2F4F8A is a blue with RGB values 47, 79, 138 and HSL 219°, 49%, 36%. It is a dark colour, so white text on it reaches 8.1:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#2F4F8A#2F4F8A
HEX#2F4F8A
RGBrgb(47, 79, 138)
RGB (0–1)0.1843, 0.3098, 0.5412
RGB percentages18.4%, 31%, 54.1%
HSLhsl(218.9, 49.2%, 36.3%)
HSV / HSBhsv(218.9, 65.9%, 54.1%)
CMYK65.9%, 42.8%, 0%, 45.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,100,554
CSS custom property--colour: #2F4F8A;

Brightness & contrast

Relative luminance0.08031WCAG 2.x, 0 is black and 1 is white
Perceived brightness80.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.06:1
Contrast with white8.06:1WCAG normal text: AAA
Contrast with black2.61:1WCAG normal text: Fail
Greyscale equivalent#4C4C4C
Inverted#D0B075

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#34558Cno red cones; affects about 1% of men; ΔE 3.8 from the original
Deuteranopia#264C89no green cones; the most common form, about 1% of men; ΔE 2.1 from the original
Tritanopia#005C65no blue cones; rare, and affects men and women equally; ΔE 37.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.06:1WCAG large text: AAA
Contrast with black, large text2.61:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 18.9Steel blue · ΔE 22.6Cornflower blue · ΔE 30.7Midnight blue · ΔE 32.4Slate grey · ΔE 33.6Light slate grey · ΔE 35.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 18.86, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8A6A2F
Analogous#2F7D8A, #3C2F8A
Triadic#8A2F4F, #4F8A2F
Split complementary#8A3C2F, #7D8A2F
Tetradic#8A2F7D, #8A6A2F, #2F8A3C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A5BAE0
Lighter +30%#7F9CD3
Lighter +20%#597FC6
Lighter +10%#3C65B0
Darker −10%#223964
Darker −20%#15233E
Darker −30%#080E18
Darker −40%#000000
More saturated +25%#1848A1
Less saturated −25%#465673

Channel breakdown

R47
G79
B138
Red47 (18.4%)
Green79 (31%)
Blue138 (54.1%)
Hue218.9°
Saturation (HSL)49.19%
Lightness36.27%
Dominant channelBlue
Hex per channelR 2F · G 4F · B 8A

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Every value on this page was computed from “2f4f8a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.