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Recognised as Colour

#374A9B

  • #374A9B
  • Blue
  • Dark
  • Nearest: Dark slateblue

#374A9B is a blue with RGB values 55, 74, 155 and HSL 229°, 48%, 41%. It is a dark colour, so white text on it reaches 8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#374A9B#374A9B
HEX#374A9B
RGBrgb(55, 74, 155)
RGB (0–1)0.2157, 0.2902, 0.6078
RGB percentages21.6%, 29%, 60.8%
HSLhsl(228.6, 47.6%, 41.2%)
HSV / HSBhsv(228.6, 64.5%, 60.8%)
CMYK64.5%, 52.3%, 0%, 39.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,623,579
CSS custom property--colour: #374A9B;

Brightness & contrast

Relative luminance0.08076WCAG 2.x, 0 is black and 1 is white
Perceived brightness82.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.03:1
Contrast with white8.03:1WCAG normal text: AAA
Contrast with black2.62:1WCAG normal text: Fail
Greyscale equivalent#4C4C4C
Inverted#C8B564

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1B559Eno red cones; affects about 1% of men; ΔE 10.5 from the original
Deuteranopia#004C99no green cones; the most common form, about 1% of men; ΔE 8 from the original
Tritanopia#005D6Bno blue cones; rare, and affects men and women equally; ΔE 49.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.03:1WCAG large text: AAA
Contrast with black, large text2.62:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 8.7Midnight blue · ΔE 22.2Slate blue · ΔE 22.9Rebecca purple · ΔE 23.5Royal blue · ΔE 24.1Medium purple · ΔE 27.3
Nearest named CSS colourDark slateblue (#483D8B)ΔE 8.65, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9B8837
Analogous#377C9B, #56379B
Triadic#9B374A, #4A9B37
Split complementary#9B5637, #7C9B37
Tetradic#9B377C, #9B8837, #379B56

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B8C1E6
Lighter +30%#93A0D9
Lighter +20%#6D7FCB
Lighter +10%#475EBE
Darker −10%#2A3875
Darker −20%#1C2650
Darker −30%#0F142A
Darker −40%#020204
More saturated +25%#1D3AB5
Less saturated −25%#515A81

Channel breakdown

R55
G74
B155
Red55 (21.6%)
Green74 (29%)
Blue155 (60.8%)
Hue228.6°
Saturation (HSL)47.62%
Lightness41.18%
Dominant channelBlue
Hex per channelR 37 · G 4A · B 9B

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Every value on this page was computed from “374a9b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.