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Recognised as Colour

#042DBB

  • #042DBB
  • Blue
  • Dark
  • Nearest: Dark blue

#042DBB is a blue with RGB values 4, 45, 187 and HSL 227°, 96%, 37%. It is a dark colour, so white text on it reaches 10:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#042DBB#042DBB
HEX#042DBB
RGBrgb(4, 45, 187)
RGB (0–1)0.0157, 0.1765, 0.7333
RGB percentages1.6%, 17.6%, 73.3%
HSLhsl(226.6, 95.8%, 37.5%)
HSV / HSBhsv(226.6, 97.9%, 73.3%)
CMYK97.9%, 75.9%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer273,851
CSS custom property--colour: #042DBB;

Brightness & contrast

Relative luminance0.0549WCAG 2.x, 0 is black and 1 is white
Perceived brightness72 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.01:1
Contrast with white10.01:1WCAG normal text: AAA
Contrast with black2.1:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#FBD244

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004BBFno red cones; affects about 1% of men; ΔE 21.7 from the original
Deuteranopia#0039B9no green cones; the most common form, about 1% of men; ΔE 10 from the original
Tritanopia#005872no blue cones; rare, and affects men and women equally; ΔE 79.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.01:1WCAG large text: AAA
Contrast with black, large text2.1:1WCAG large text: Fail

Named colours

Dark blue · ΔE 15.8Navy · ΔE 18.8Indigo · ΔE 24.4Medium slateblue · ΔE 26.6Slate blue · ΔE 26.7Medium blue · ΔE 26.9
Nearest named CSS colourDark blue (#00008B)ΔE 15.81, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BB9204
Analogous#0489BB, #3704BB
Triadic#BB042D, #2DBB04
Split complementary#BB3704, #89BB04
Tetradic#BB0488, #BB9204, #04BB37

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8EA7FD
Lighter +30%#5C80FC
Lighter +20%#2B59FA
Lighter +10%#0539ED
Darker −10%#032189
Darker −20%#021557
Darker −30%#010925
Darker −40%#000000
More saturated +25%#002BBF
Less saturated −25%#1C3AA3

Channel breakdown

R4
G45
B187
Red4 (1.6%)
Green45 (17.6%)
Blue187 (73.3%)
Hue226.56°
Saturation (HSL)95.81%
Lightness37.45%
Dominant channelBlue
Hex per channelR 04 · G 2D · B BB

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Every value on this page was computed from “042dbb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.