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Recognised as Colour

#3742AB

  • #3742AB
  • Blue
  • Dark
  • Nearest: Slate blue

#3742AB is a blue with RGB values 55, 66, 171 and HSL 234°, 51%, 44%. It is a dark colour, so white text on it reaches 8.3:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#3742AB#3742AB
HEX#3742AB
RGBrgb(55, 66, 171)
RGB (0–1)0.2157, 0.2588, 0.6706
RGB percentages21.6%, 25.9%, 67.1%
HSLhsl(234.3, 51.3%, 44.3%)
HSV / HSBhsv(234.3, 67.8%, 67.1%)
CMYK67.8%, 61.4%, 0%, 32.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,621,547
CSS custom property--colour: #3742AB;

Brightness & contrast

Relative luminance0.07649WCAG 2.x, 0 is black and 1 is white
Perceived brightness82.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.3:1
Contrast with white8.3:1WCAG normal text: AAA
Contrast with black2.53:1WCAG normal text: Fail
Greyscale equivalent#474747
Inverted#C8BD54

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0054AEno red cones; affects about 1% of men; ΔE 16.4 from the original
Deuteranopia#0049A9no green cones; the most common form, about 1% of men; ΔE 10.2 from the original
Tritanopia#005C70no blue cones; rare, and affects men and women equally; ΔE 60.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.3:1WCAG large text: AAA
Contrast with black, large text2.53:1WCAG large text: Fail

Named colours

Slate blue · ΔE 13.3Rebecca purple · ΔE 16.3Dark slateblue · ΔE 16.4Royal blue · ΔE 17Midnight blue · ΔE 19.2Medium slateblue · ΔE 23
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 13.32, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#ABA037
Analogous#377CAB, #6637AB
Triadic#AB3742, #42AB37
Split complementary#AB6637, #7CAB37
Tetradic#AB377C, #ABA037, #37AB66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C2C6EC
Lighter +30%#9CA2DF
Lighter +20%#757ED3
Lighter +10%#4F5AC6
Darker −10%#2B3384
Darker −20%#1E245E
Darker −30%#121537
Darker −40%#050611
More saturated +25%#1B2BC7
Less saturated −25%#53598F

Channel breakdown

R55
G66
B171
Red55 (21.6%)
Green66 (25.9%)
Blue171 (67.1%)
Hue234.31°
Saturation (HSL)51.33%
Lightness44.31%
Dominant channelBlue
Hex per channelR 37 · G 42 · B AB

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Every value on this page was computed from “3742ab” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.