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Recognised as Colour

#001728

  • #001728
  • Blue
  • Dark
  • Nearest: Black

#001728 is a blue with RGB values 0, 23, 40 and HSL 206°, 100%, 8%. It is a dark colour, so white text on it reaches 18.2:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#001728#001728
HEX#001728
RGBrgb(0, 23, 40)
RGB (0–1)0, 0.0902, 0.1569
RGB percentages0%, 9%, 15.7%
HSLhsl(205.5, 100%, 7.8%)
HSV / HSBhsv(205.5, 100%, 15.7%)
CMYK100%, 42.5%, 0%, 84.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,928
CSS custom property--colour: #001728;

Brightness & contrast

Relative luminance0.00766WCAG 2.x, 0 is black and 1 is white
Perceived brightness22.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.21:1
Contrast with white18.21:1WCAG normal text: AAA
Contrast with black1.15:1WCAG normal text: Fail
Greyscale equivalent#131313
Inverted#FFE8D7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0F1729no red cones; affects about 1% of men; ΔE 4.7 from the original
Deuteranopia#081428no green cones; the most common form, about 1% of men; ΔE 4.3 from the original
Tritanopia#001B1Dno 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 text18.21:1WCAG large text: AAA
Contrast with black, large text1.15:1WCAG large text: Fail

Named colours

Black · ΔE 15.9Dark slate grey · ΔE 28.4Dim grey · ΔE 40.2Dark slateblue · ΔE 45.9Slate grey · ΔE 46.1Gray · ΔE 48.8
Nearest named CSS colourBlack (#000000)ΔE 15.95, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#281100
Analogous#002825, #000328
Triadic#280017, #172800
Split complementary#280003, #282500
Tetradic#250028, #281100, #032800

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#008CF4
Lighter +30%#006FC1
Lighter +20%#00528E
Lighter +10%#00345B
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#001728
Less saturated −25%#051623

Channel breakdown

R0
G23
B40
Red0 (0%)
Green23 (9%)
Blue40 (15.7%)
Hue205.5°
Saturation (HSL)100%
Lightness7.84%
Dominant channelBlue
Hex per channelR 00 · G 17 · B 28

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Every value on this page was computed from “hex 001728” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.