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Recognised as Colour

#040101

  • #040101
  • Red
  • Dark
  • Nearest: Black

#040101 is a red with RGB values 4, 1, 1 and HSL 0°, 60%, 1%. It is a dark colour, so white text on it reaches 20.8:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#040101#040101
HEX#040101
RGBrgb(4, 1, 1)
RGB (0–1)0.0157, 0.0039, 0.0039
RGB percentages1.6%, 0.4%, 0.4%
HSLhsl(0, 60%, 1%)
HSV / HSBhsv(0, 75%, 1.6%)
CMYK0%, 75%, 75%, 98.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer262,401
CSS custom property--colour: #040101;

Brightness & contrast

Relative luminance0.0005WCAG 2.x, 0 is black and 1 is white
Perceived brightness2.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 20.79:1
Contrast with white20.79:1WCAG normal text: AAA
Contrast with black1.01:1WCAG normal text: Fail
Greyscale equivalent#020202
Inverted#FBFEFE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#010101no red cones; affects about 1% of men; ΔE 0.8 from the original
Deuteranopia#020201no green cones; the most common form, about 1% of men; ΔE 0.9 from the original
Tritanopia#050101no 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 text20.79:1WCAG large text: AAA
Contrast with black, large text1.01:1WCAG large text: Fail

Named colours

Black · ΔE 0.9Dark slate grey · ΔE 33.5Dim grey · ΔE 44Gray · ΔE 53.1Slate grey · ΔE 53.6Dark olivegreen · ΔE 55.2
Nearest named CSS colourBlack (#000000)ΔE 0.95, indistinguishable to the eye
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#010404
Analogous#040103, #040301
Triadic#010401, #010104
Split complementary#010403, #010304
Tetradic#030401, #010404, #030104

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A72A2A
Lighter +30%#7E2020
Lighter +20%#561515
Lighter +10%#2D0B0B
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#050000
Less saturated −25%#030202

Channel breakdown

R4
G1
B1
Red4 (1.6%)
Green1 (0.4%)
Blue1 (0.4%)
Hue0°
Saturation (HSL)60%
Lightness0.98%
Dominant channelRed
Hex per channelR 04 · G 01 · B 01

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Every value on this page was computed from “hex 040101” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.