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Recognised as Colour

#040001

  • #040001
  • Red
  • Dark
  • Nearest: Black

#040001 is a red with RGB values 4, 0, 1 and HSL 345°, 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

#040001#040001
HEX#040001
RGBrgb(4, 0, 1)
RGB (0–1)0.0157, 0, 0.0039
RGB percentages1.6%, 0%, 0.4%
HSLhsl(345, 100%, 0.8%)
HSV / HSBhsv(345, 100%, 1.6%)
CMYK0%, 100%, 75%, 98.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer262,145
CSS custom property--colour: #040001;

Brightness & contrast

Relative luminance0.00028WCAG 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 20.88:1
Contrast with white20.88:1WCAG normal text: AAA
Contrast with black1.01:1WCAG normal text: Fail
Greyscale equivalent#010101
Inverted#FBFFFE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#000101no red cones; affects about 1% of men; ΔE 1.4 from the original
Deuteranopia#010101no 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 0.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text20.88:1WCAG large text: AAA
Contrast with black, large text1.01:1WCAG large text: Fail

Named colours

Black · ΔE 1.2Dark slate grey · ΔE 33.8Dim grey · ΔE 44.2Gray · ΔE 53.3Slate grey · ΔE 53.7Dark olivegreen · ΔE 55.7
Nearest named CSS colourBlack (#000000)ΔE 1.21, below the just-noticeable difference
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#000403
Analogous#040003, #040100
Triadic#010400, #000104
Split complementary#000401, #000304
Tetradic#030400, #000403, #010004

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D00034
Lighter +30%#9D0027
Lighter +20%#6A001A
Lighter +10%#37000E
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#040001
Less saturated −25%#040001

Channel breakdown

R4
G0
B1
Red4 (1.6%)
Green0 (0%)
Blue1 (0.4%)
Hue345°
Saturation (HSL)100%
Lightness0.78%
Dominant channelRed
Hex per channelR 04 · G 00 · B 01

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Every value on this page was computed from “hex 040001” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.