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Recognised as Colour

#04018E

  • #04018E
  • Blue
  • Dark
  • Nearest: Dark blue

#04018E is a blue with RGB values 4, 1, 142 and HSL 241°, 99%, 28%. It is a dark colour, so white text on it reaches 15:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#04018E#04018E
HEX#04018E
RGBrgb(4, 1, 142)
RGB (0–1)0.0157, 0.0039, 0.5569
RGB percentages1.6%, 0.4%, 55.7%
HSLhsl(241.3, 98.6%, 28%)
HSV / HSBhsv(241.3, 99.3%, 55.7%)
CMYK97.2%, 99.3%, 0%, 44.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer262,542
CSS custom property--colour: #04018E;

Brightness & contrast

Relative luminance0.02001WCAG 2.x, 0 is black and 1 is white
Perceived brightness48 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15:1
Contrast with white15:1WCAG normal text: AAA
Contrast with black1.4:1WCAG normal text: Fail
Greyscale equivalent#0C0C0C
Inverted#FBFE71

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#002E91no red cones; affects about 1% of men; ΔE 26.1 from the original
Deuteranopia#001F8Cno green cones; the most common form, about 1% of men; ΔE 16.6 from the original
Tritanopia#003851no blue cones; rare, and affects men and women equally; ΔE 75.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text15:1WCAG large text: AAA
Contrast with black, large text1.4:1WCAG large text: Fail

Named colours

Dark blue · ΔE 1.1Navy · ΔE 6.3Indigo · ΔE 16.8Midnight blue · ΔE 27.5Medium blue · ΔE 29.1Rebecca purple · ΔE 29.3
Nearest named CSS colourDark blue (#00008B)ΔE 1.09, below the just-noticeable difference
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8B8E01
Analogous#01448E, #4B018E
Triadic#8E0401, #018E04
Split complementary#8E4A01, #458E01
Tetradic#8E0144, #8B8E01, #018E4A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#615DFE
Lighter +30%#2F2AFE
Lighter +20%#0702F3
Lighter +10%#0501C1
Darker −10%#03015B
Darker −20%#010029
Darker −30%#000000
Darker −40%#000000
More saturated +25%#03008F
Less saturated −25%#15137C

Channel breakdown

R4
G1
B142
Red4 (1.6%)
Green1 (0.4%)
Blue142 (55.7%)
Hue241.28°
Saturation (HSL)98.6%
Lightness28.04%
Dominant channelBlue
Hex per channelR 04 · G 01 · B 8E

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Every value on this page was computed from “04018e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.