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Recognised as Colour

#04091F

  • #04091F
  • Blue
  • Dark
  • Nearest: Black

#04091F is a blue with RGB values 4, 9, 31 and HSL 229°, 77%, 7%. It is a dark colour, so white text on it reaches 19.7:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#04091F#04091F
HEX#04091F
RGBrgb(4, 9, 31)
RGB (0–1)0.0157, 0.0353, 0.1216
RGB percentages1.6%, 3.5%, 12.2%
HSLhsl(228.9, 77.1%, 6.9%)
HSV / HSBhsv(228.9, 87.1%, 12.2%)
CMYK87.1%, 71%, 0%, 87.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer264,479
CSS custom property--colour: #04091F;

Brightness & contrast

Relative luminance0.0032WCAG 2.x, 0 is black and 1 is white
Perceived brightness12.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 19.74:1
Contrast with white19.74:1WCAG normal text: AAA
Contrast with black1.06:1WCAG normal text: Fail
Greyscale equivalent#0A0A0A
Inverted#FBF6E0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#010C20no red cones; affects about 1% of men; ΔE 1.8 from the original
Deuteranopia#00091Fno green cones; the most common form, about 1% of men; ΔE 1.1 from the original
Tritanopia#000E12no blue cones; rare, and affects men and women equally; ΔE 12.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text19.74:1WCAG large text: AAA
Contrast with black, large text1.06:1WCAG large text: Fail

Named colours

Black · ΔE 14.4Dark slate grey · ΔE 33.8Dim grey · ΔE 43.8Dark slateblue · ΔE 45.7Midnight blue · ΔE 47.4Slate grey · ΔE 50.4
Nearest named CSS colourBlack (#000000)ΔE 14.36, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1F1A04
Analogous#04161F, #0D041F
Triadic#1F0409, #091F04
Split complementary#1F0D04, #161F04
Tetradic#1F0416, #1F1A04, #041F0D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#1B3DD4
Lighter +30%#1530A7
Lighter +20%#102379
Lighter +10%#0A164C
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#000623
Less saturated −25%#080C1B

Channel breakdown

R4
G9
B31
Red4 (1.6%)
Green9 (3.5%)
Blue31 (12.2%)
Hue228.89°
Saturation (HSL)77.14%
Lightness6.86%
Dominant channelBlue
Hex per channelR 04 · G 09 · B 1F

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Every value on this page was computed from “04091f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.