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Colour

#040F42

  • #040F42
  • Blue
  • Dark
  • Nearest: Midnight blue

#040F42 is a blue with RGB values 4, 15, 66 and HSL 229°, 89%, 14%. It is a dark colour, so white text on it reaches 18.2:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#040F42#040F42
HEX#040F42
RGBrgb(4, 15, 66)
RGB (0–1)0.0157, 0.0588, 0.2588
RGB percentages1.6%, 5.9%, 25.9%
HSLhsl(229.4, 88.6%, 13.7%)
HSV / HSBhsv(229.4, 93.9%, 25.9%)
CMYK93.9%, 77.3%, 0%, 74.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer266,050
CSS custom property--colour: #040F42;

Brightness & contrast

Relative luminance0.00761WCAG 2.x, 0 is black and 1 is white
Perceived brightness25.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.23:1
Contrast with white18.23:1WCAG normal text: AAA
Contrast with black1.15:1WCAG normal text: Fail
Greyscale equivalent#101010
Inverted#FBF0BD

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#001844no red cones; affects about 1% of men; ΔE 7.6 from the original
Deuteranopia#001241no green cones; the most common form, about 1% of men; ΔE 3.5 from the original
Tritanopia#001D27no blue cones; rare, and affects men and women equally; ΔE 34 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.23:1WCAG large text: AAA
Contrast with black, large text1.15:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 23.1Dark slateblue · ΔE 26.8Black · ΔE 38.5Rebecca purple · ΔE 38.6Indigo · ΔE 41.5Navy · ΔE 43.5
Nearest named CSS colourMidnight blue (#191970)ΔE 23.12, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#423704
Analogous#042E42, #180442
Triadic#42040F, #0F4204
Split complementary#421804, #2E4204
Tetradic#42042E, #423704, #044218

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#2046F2
Lighter +30%#0D30D2
Lighter +20%#0A25A2
Lighter +10%#071A72
Darker −10%#010412
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#000C46
Less saturated −25%#0D1539

Channel breakdown

R4
G15
B66
Red4 (1.6%)
Green15 (5.9%)
Blue66 (25.9%)
Hue229.35°
Saturation (HSL)88.57%
Lightness13.73%
Dominant channelBlue
Hex per channelR 04 · G 0F · B 42

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Every value on this page was computed from “040f42” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.