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Recognised as Colour

#04173A

  • #04173A
  • Blue
  • Dark
  • Nearest: Black

#04173A is a blue with RGB values 4, 23, 58 and HSL 219°, 87%, 12%. It is a dark colour, so white text on it reaches 17.7:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#04173A#04173A
HEX#04173A
RGBrgb(4, 23, 58)
RGB (0–1)0.0157, 0.0902, 0.2275
RGB percentages1.6%, 9%, 22.7%
HSLhsl(218.9, 87.1%, 12.2%)
HSV / HSBhsv(218.9, 93.1%, 22.7%)
CMYK93.1%, 60.3%, 0%, 77.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer268,090
CSS custom property--colour: #04173A;

Brightness & contrast

Relative luminance0.00944WCAG 2.x, 0 is black and 1 is white
Perceived brightness26.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.66:1
Contrast with white17.66:1WCAG normal text: AAA
Contrast with black1.19:1WCAG normal text: Fail
Greyscale equivalent#151515
Inverted#FBE8C5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#021B3Bno red cones; affects about 1% of men; ΔE 3.7 from the original
Deuteranopia#001639no green cones; the most common form, about 1% of men; ΔE 0.9 from the original
Tritanopia#002025no blue cones; rare, and affects men and women equally; ΔE 25.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.66:1WCAG large text: AAA
Contrast with black, large text1.19:1WCAG large text: Fail

Named colours

Black · ΔE 27.5Dark slateblue · ΔE 33.4Midnight blue · ΔE 34.9Dark slate grey · ΔE 36.9Dim grey · ΔE 44.4Steel blue · ΔE 46.2
Nearest named CSS colourBlack (#000000)ΔE 27.54, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3A2704
Analogous#04323A, #0C043A
Triadic#3A0417, #173A04
Split complementary#3A0C04, #323A04
Tetradic#3A0432, #3A2704, #043A0C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#1B66EF
Lighter +30%#0E50C9
Lighter +20%#0B3D99
Lighter +10%#072A6A
Darker −10%#01040A
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#00163E
Less saturated −25%#0C1932

Channel breakdown

R4
G23
B58
Red4 (1.6%)
Green23 (9%)
Blue58 (22.7%)
Hue218.89°
Saturation (HSL)87.1%
Lightness12.16%
Dominant channelBlue
Hex per channelR 04 · G 17 · B 3A

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Every value on this page was computed from “04173a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.