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Recognised as Colour

#0155A5

  • #0155A5
  • Blue
  • Dark
  • Nearest: Dark slateblue

#0155A5 is a blue with RGB values 1, 85, 165 and HSL 209°, 99%, 33%. It is a dark colour, so white text on it reaches 7.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#0155A5#0155A5
HEX#0155A5
RGBrgb(1, 85, 165)
RGB (0–1)0.0039, 0.3333, 0.6471
RGB percentages0.4%, 33.3%, 64.7%
HSLhsl(209.3, 98.8%, 32.5%)
HSV / HSBhsv(209.3, 99.4%, 64.7%)
CMYK99.4%, 48.5%, 0%, 35.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer87,461
CSS custom property--colour: #0155A5;

Brightness & contrast

Relative luminance0.0922WCAG 2.x, 0 is black and 1 is white
Perceived brightness85.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.38:1
Contrast with white7.38:1WCAG normal text: AAA
Contrast with black2.84:1WCAG normal text: Fail
Greyscale equivalent#494949
Inverted#FEAA5A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#255DA8no red cones; affects about 1% of men; ΔE 5 from the original
Deuteranopia#004FA3no green cones; the most common form, about 1% of men; ΔE 4.2 from the original
Tritanopia#006975no blue cones; rare, and affects men and women equally; ΔE 47.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.38:1WCAG large text: AAA
Contrast with black, large text2.84:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 17.9Royal blue · ΔE 25.3Cornflower blue · ΔE 25.6Dodgerblue · ΔE 27.1Steel blue · ΔE 27.5Slate blue · ΔE 28.4
Nearest named CSS colourDark slateblue (#483D8B)ΔE 17.86, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A55101
Analogous#01A5A3, #0103A5
Triadic#A50155, #55A501
Split complementary#A50103, #A5A301
Tetradic#A301A5, #A55101, #03A501

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#74BBFE
Lighter +30%#41A2FE
Lighter +20%#0E89FE
Lighter +10%#016FD8
Darker −10%#013B72
Darker −20%#002140
Darker −30%#00070D
Darker −40%#000000
More saturated +25%#0055A6
Less saturated −25%#165490

Channel breakdown

R1
G85
B165
Red1 (0.4%)
Green85 (33.3%)
Blue165 (64.7%)
Hue209.27°
Saturation (HSL)98.8%
Lightness32.55%
Dominant channelBlue
Hex per channelR 01 · G 55 · B A5

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Every value on this page was computed from “0155a5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.