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Recognised as Colour

#304F74

  • #304F74
  • Blue
  • Dark
  • Nearest: Steel blue

#304F74 is a blue with RGB values 48, 79, 116 and HSL 213°, 41%, 32%. It is a dark colour, so white text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Steel blue.

Colour values

#304F74#304F74
HEX#304F74
RGBrgb(48, 79, 116)
RGB (0–1)0.1882, 0.3098, 0.4549
RGB percentages18.8%, 31%, 45.5%
HSLhsl(212.6, 41.5%, 32.2%)
HSV / HSBhsv(212.6, 58.6%, 45.5%)
CMYK58.6%, 31.9%, 0%, 54.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,166,068
CSS custom property--colour: #304F74;

Brightness & contrast

Relative luminance0.07481WCAG 2.x, 0 is black and 1 is white
Perceived brightness76.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.41:1
Contrast with white8.41:1WCAG normal text: AAA
Contrast with black2.5:1WCAG normal text: Fail
Greyscale equivalent#4B4B4B
Inverted#CFB08B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#405176no red cones; affects about 1% of men; ΔE 4.2 from the original
Deuteranopia#374A73no green cones; the most common form, about 1% of men; ΔE 5 from the original
Tritanopia#00575Cno blue cones; rare, and affects men and women equally; ΔE 25.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.41:1WCAG large text: AAA
Contrast with black, large text2.5:1WCAG large text: Fail

Named colours

Steel blue · ΔE 21.5Dark slate grey · ΔE 24.3Slate grey · ΔE 24.6Light slate grey · ΔE 26.9Dim grey · ΔE 27.2Dark slateblue · ΔE 31
Nearest named CSS colourSteel blue (#4682B4)ΔE 21.5, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#745530
Analogous#307174, #333074
Triadic#74304F, #4F7430
Split complementary#743330, #717430
Tetradic#743071, #745530, #307433

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9BB5D5
Lighter +30%#769BC7
Lighter +20%#5281B8
Lighter +10%#3F6898
Darker −10%#213650
Darker −20%#121E2C
Darker −30%#030508
Darker −40%#000000
More saturated +25%#1B4D89
Less saturated −25%#44515F

Channel breakdown

R48
G79
B116
Red48 (18.8%)
Green79 (31%)
Blue116 (45.5%)
Hue212.65°
Saturation (HSL)41.46%
Lightness32.16%
Dominant channelBlue
Hex per channelR 30 · G 4F · B 74

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Every value on this page was computed from “304f74” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.