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Recognised as Colour

#040000

  • #040000
  • Red
  • Dark
  • Nearest: Black

#040000 is a red with RGB values 4, 0, 0 and HSL 0°, 100%, 1%. It is a dark colour, so white text on it reaches 20.9:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#040000#040000
HEX#040000
RGBrgb(4, 0, 0)
RGB (0–1)0.0157, 0, 0
RGB percentages1.6%, 0%, 0%
HSLhsl(0, 100%, 0.8%)
HSV / HSBhsv(0, 100%, 1.6%)
CMYK0%, 100%, 100%, 98.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer262,144
CSS custom property--colour: #040000;

Brightness & contrast

Relative luminance0.00026WCAG 2.x, 0 is black and 1 is white
Perceived brightness2.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 20.89:1
Contrast with white20.89:1WCAG normal text: AAA
Contrast with black1.01:1WCAG normal text: Fail
Greyscale equivalent#010101
Inverted#FBFFFF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#010000no red cones; affects about 1% of men; ΔE 0.8 from the original
Deuteranopia#010100no green cones; the most common form, about 1% of men; ΔE 1.2 from the original
Tritanopia#050000no blue cones; rare, and affects men and women equally; ΔE 0.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text20.89:1WCAG large text: AAA
Contrast with black, large text1.01:1WCAG large text: Fail

Named colours

Black · ΔE 1.1Dark slate grey · ΔE 33.8Dim grey · ΔE 44.2Gray · ΔE 53.4Slate grey · ΔE 53.8Dark olivegreen · ΔE 55.4
Nearest named CSS colourBlack (#000000)ΔE 1.13, below the just-noticeable difference
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#000404
Analogous#040002, #040200
Triadic#000400, #000004
Split complementary#000402, #000204
Tetradic#020400, #000404, #020004

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D00000
Lighter +30%#9D0000
Lighter +20%#6A0000
Lighter +10%#370000
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#040000
Less saturated −25%#040000

Channel breakdown

R4
G0
B0
Red4 (1.6%)
Green0 (0%)
Blue0 (0%)
Hue0°
Saturation (HSL)100%
Lightness0.78%
Dominant channelRed
Hex per channelR 04 · G 00 · B 00

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Every value on this page was computed from “hex 040000” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.