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Recognised as Colour

#040421

  • #040421
  • Blue
  • Dark
  • Nearest: Black

#040421 is a blue with RGB values 4, 4, 33 and HSL 240°, 78%, 7%. It is a dark colour, so white text on it reaches 20.1:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#040421#040421
HEX#040421
RGBrgb(4, 4, 33)
RGB (0–1)0.0157, 0.0157, 0.1294
RGB percentages1.6%, 1.6%, 12.9%
HSLhsl(240, 78.4%, 7.3%)
HSV / HSBhsv(240, 87.9%, 12.9%)
CMYK87.9%, 87.9%, 0%, 87.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer263,201
CSS custom property--colour: #040421;

Brightness & contrast

Relative luminance0.00222WCAG 2.x, 0 is black and 1 is white
Perceived brightness11.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 20.11:1
Contrast with white20.11:1WCAG normal text: AAA
Contrast with black1.04:1WCAG normal text: Fail
Greyscale equivalent#060606
Inverted#FBFBDE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#000922no red cones; affects about 1% of men; ΔE 2.8 from the original
Deuteranopia#000620no green cones; the most common form, about 1% of men; ΔE 2.4 from the original
Tritanopia#000B11no blue cones; rare, and affects men and women equally; ΔE 15.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text20.11:1WCAG large text: AAA
Contrast with black, large text1.04:1WCAG large text: Fail

Named colours

Black · ΔE 17.8Dark slate grey · ΔE 36.7Dark slateblue · ΔE 43.3Midnight blue · ΔE 43.9Dim grey · ΔE 45.9Slate grey · ΔE 51.9
Nearest named CSS colourBlack (#000000)ΔE 17.8, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#212104
Analogous#041321, #130421
Triadic#210404, #042104
Split complementary#211304, #132104
Tetradic#210413, #212104, #042113

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#1A1AD7
Lighter +30%#1515A9
Lighter +20%#0F0F7C
Lighter +10%#0A0A4E
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#000025
Less saturated −25%#09091C

Channel breakdown

R4
G4
B33
Red4 (1.6%)
Green4 (1.6%)
Blue33 (12.9%)
Hue240°
Saturation (HSL)78.38%
Lightness7.25%
Dominant channelBlue
Hex per channelR 04 · G 04 · B 21

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Every value on this page was computed from “hex 040421” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.