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Recognised as Colour

#040042

  • #040042
  • Blue
  • Dark
  • Nearest: Midnight blue

#040042 is a blue with RGB values 4, 0, 66 and HSL 244°, 100%, 13%. It is a dark colour, so white text on it reaches 19.4:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#040042#040042
HEX#040042
RGBrgb(4, 0, 66)
RGB (0–1)0.0157, 0, 0.2588
RGB percentages1.6%, 0%, 25.9%
HSLhsl(243.6, 100%, 12.9%)
HSV / HSBhsv(243.6, 100%, 25.9%)
CMYK93.9%, 100%, 0%, 74.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer262,210
CSS custom property--colour: #040042;

Brightness & contrast

Relative luminance0.00419WCAG 2.x, 0 is black and 1 is white
Perceived brightness22.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 19.38:1
Contrast with white19.38:1WCAG normal text: AAA
Contrast with black1.08:1WCAG normal text: Fail
Greyscale equivalent#060606
Inverted#FBFFBD

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#001144no red cones; affects about 1% of men; ΔE 10.2 from the original
Deuteranopia#000A41no green cones; the most common form, about 1% of men; ΔE 7 from the original
Tritanopia#001623no blue cones; rare, and affects men and women equally; ΔE 39.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text19.38:1WCAG large text: AAA
Contrast with black, large text1.08:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 17.6Dark slateblue · ΔE 27.3Indigo · ΔE 34.5Rebecca purple · ΔE 35Navy · ΔE 35.5Dark blue · ΔE 40.8
Nearest named CSS colourMidnight blue (#191970)ΔE 17.62, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3E4200
Analogous#001D42, #250042
Triadic#420400, #004204
Split complementary#422500, #1D4200
Tetradic#42001D, #3E4200, #004225

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#1E0FFF
Lighter +30%#0D00DB
Lighter +20%#0A00A8
Lighter +10%#070075
Darker −10%#01000F
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#040042
Less saturated −25%#0B083A

Channel breakdown

R4
G0
B66
Red4 (1.6%)
Green0 (0%)
Blue66 (25.9%)
Hue243.64°
Saturation (HSL)100%
Lightness12.94%
Dominant channelBlue
Hex per channelR 04 · G 00 · B 42

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Every value on this page was computed from “hex 040042” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.