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Recognised as Colour

#303D47

  • #303D47
  • Blue
  • Dark
  • Nearest: Dark slate grey

#303D47 is a blue with RGB values 48, 61, 71 and HSL 206°, 19%, 23%. It is a dark colour, so white text on it reaches 11.1:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#303D47#303D47
HEX#303D47
RGBrgb(48, 61, 71)
RGB (0–1)0.1882, 0.2392, 0.2784
RGB percentages18.8%, 23.9%, 27.8%
HSLhsl(206.1, 19.3%, 23.3%)
HSV / HSBhsv(206.1, 32.4%, 27.8%)
CMYK32.4%, 14.1%, 0%, 72.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,161,415
CSS custom property--colour: #303D47;

Brightness & contrast

Relative luminance0.04421WCAG 2.x, 0 is black and 1 is white
Perceived brightness58.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.15:1
Contrast with white11.15:1WCAG normal text: AAA
Contrast with black1.88:1WCAG normal text: Fail
Greyscale equivalent#3B3B3B
Inverted#CFC2B8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#393D48no red cones; affects about 1% of men; ΔE 3.7 from the original
Deuteranopia#363A47no green cones; the most common form, about 1% of men; ΔE 4.3 from the original
Tritanopia#293F40no blue cones; rare, and affects men and women equally; ΔE 7.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.15:1WCAG large text: AAA
Contrast with black, large text1.88:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 11.9Dim grey · ΔE 21.1Black · ΔE 26.3Slate grey · ΔE 28Gray · ΔE 29.7Light slate grey · ΔE 31.1
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 11.86, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#473A30
Analogous#304745, #303247
Triadic#47303D, #3D4730
Split complementary#473031, #474630
Tetradic#463047, #473A30, #314730

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8FA4B4
Lighter +30%#718B9F
Lighter +20%#597184
Lighter +10%#455765
Darker −10%#1B2329
Darker −20%#07090A
Darker −30%#000000
Darker −40%#000000
More saturated +25%#213F56
Less saturated −25%#3B3B3B

Channel breakdown

R48
G61
B71
Red48 (18.8%)
Green61 (23.9%)
Blue71 (27.8%)
Hue206.09°
Saturation (HSL)19.33%
Lightness23.33%
Dominant channelBlue
Hex per channelR 30 · G 3D · B 47

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Every value on this page was computed from “303d47” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.