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Recognised as Colour

#040717

  • #040717
  • Blue
  • Dark
  • Nearest: Black

#040717 is a blue with RGB values 4, 7, 23 and HSL 231°, 70%, 5%. It is a dark colour, so white text on it reaches 20:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#040717#040717
HEX#040717
RGBrgb(4, 7, 23)
RGB (0–1)0.0157, 0.0275, 0.0902
RGB percentages1.6%, 2.7%, 9%
HSLhsl(230.5, 70.4%, 5.3%)
HSV / HSBhsv(230.5, 82.6%, 9%)
CMYK82.6%, 69.6%, 0%, 91%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer263,959
CSS custom property--colour: #040717;

Brightness & contrast

Relative luminance0.0024WCAG 2.x, 0 is black and 1 is white
Perceived brightness9.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 20.04:1
Contrast with white20.04:1WCAG normal text: AAA
Contrast with black1.05:1WCAG normal text: Fail
Greyscale equivalent#080808
Inverted#FBF8E8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#020918no red cones; affects about 1% of men; ΔE 1.2 from the original
Deuteranopia#010717no green cones; the most common form, about 1% of men; ΔE 0.8 from the original
Tritanopia#000A0Dno blue cones; rare, and affects men and women equally; ΔE 7.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text20.04:1WCAG large text: AAA
Contrast with black, large text1.05:1WCAG large text: Fail

Named colours

Black · ΔE 8.9Dark slate grey · ΔE 32.6Dim grey · ΔE 43.1Dark slateblue · ΔE 50.3Slate grey · ΔE 50.9Gray · ΔE 52.1
Nearest named CSS colourBlack (#000000)ΔE 8.86, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#171404
Analogous#041117, #0A0417
Triadic#170407, #071704
Split complementary#170A04, #111704
Tetradic#170411, #171404, #04170A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#223CC5
Lighter +30%#1B2F99
Lighter +20%#13216E
Lighter +10%#0C1442
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#01051A
Less saturated −25%#070914

Channel breakdown

R4
G7
B23
Red4 (1.6%)
Green7 (2.7%)
Blue23 (9%)
Hue230.53°
Saturation (HSL)70.37%
Lightness5.29%
Dominant channelBlue
Hex per channelR 04 · G 07 · B 17

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Every value on this page was computed from “hex 040717” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.