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Recognised as Colour

#040828

  • #040828
  • Blue
  • Dark
  • Nearest: Black

#040828 is a blue with RGB values 4, 8, 40 and HSL 233°, 82%, 9%. It is a dark colour, so white text on it reaches 19.6:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#040828#040828
HEX#040828
RGBrgb(4, 8, 40)
RGB (0–1)0.0157, 0.0314, 0.1569
RGB percentages1.6%, 3.1%, 15.7%
HSLhsl(233.3, 81.8%, 8.6%)
HSV / HSBhsv(233.3, 90%, 15.7%)
CMYK90%, 80%, 0%, 84.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer264,232
CSS custom property--colour: #040828;

Brightness & contrast

Relative luminance0.00353WCAG 2.x, 0 is black and 1 is white
Perceived brightness15 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 19.62:1
Contrast with white19.62:1WCAG normal text: AAA
Contrast with black1.07:1WCAG normal text: Fail
Greyscale equivalent#090909
Inverted#FBF7D7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#000D29no red cones; affects about 1% of men; ΔE 2.9 from the original
Deuteranopia#000A27no green cones; the most common form, about 1% of men; ΔE 2.4 from the original
Tritanopia#001016no blue cones; rare, and affects men and women equally; ΔE 18.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text19.62:1WCAG large text: AAA
Contrast with black, large text1.07:1WCAG large text: Fail

Named colours

Black · ΔE 21.7Dark slate grey · ΔE 37.8Dark slateblue · ΔE 39.9Midnight blue · ΔE 40.2Dim grey · ΔE 46.5Slate grey · ΔE 51.5
Nearest named CSS colourBlack (#000000)ΔE 21.72, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#282404
Analogous#041A28, #120428
Triadic#280408, #082804
Split complementary#281204, #1A2804
Tetradic#28041A, #282404, #042812

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#172DE1
Lighter +30%#1224B3
Lighter +20%#0D1B85
Lighter +10%#091156
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#00052C
Less saturated −25%#0A0C23

Channel breakdown

R4
G8
B40
Red4 (1.6%)
Green8 (3.1%)
Blue40 (15.7%)
Hue233.33°
Saturation (HSL)81.82%
Lightness8.63%
Dominant channelBlue
Hex per channelR 04 · G 08 · B 28

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Every value on this page was computed from “hex 040828” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.