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Recognised as Colour

#013388

  • #013388
  • Blue
  • Dark
  • Nearest: Dark slateblue

#013388 is a blue with RGB values 1, 51, 136 and HSL 218°, 99%, 27%. It is a dark colour, so white text on it reaches 11.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#013388#013388
HEX#013388
RGBrgb(1, 51, 136)
RGB (0–1)0.0039, 0.2, 0.5333
RGB percentages0.4%, 20%, 53.3%
HSLhsl(217.8, 98.5%, 26.9%)
HSV / HSBhsv(217.8, 99.3%, 53.3%)
CMYK99.3%, 62.5%, 0%, 46.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer78,728
CSS custom property--colour: #013388;

Brightness & contrast

Relative luminance0.04152WCAG 2.x, 0 is black and 1 is white
Perceived brightness60.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.47:1
Contrast with white11.47:1WCAG normal text: AAA
Contrast with black1.83:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#FECC77

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00408Bno red cones; affects about 1% of men; ΔE 10.1 from the original
Deuteranopia#003486no green cones; the most common form, about 1% of men; ΔE 2.1 from the original
Tritanopia#004958no blue cones; rare, and affects men and women equally; ΔE 51.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.47:1WCAG large text: AAA
Contrast with black, large text1.83:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 12Midnight blue · ΔE 13Rebecca purple · ΔE 23.1Slate blue · ΔE 26.3Royal blue · ΔE 27.9Indigo · ΔE 30.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 12.05, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#885601
Analogous#017688, #130188
Triadic#880133, #338801
Split complementary#881201, #778801
Tetradic#880176, #885601, #018812

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5795FE
Lighter +30%#2575FD
Lighter +20%#0259ED
Lighter +10%#0146BB
Darker −10%#012055
Darker −20%#000D23
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003389
Less saturated −25%#123777

Channel breakdown

R1
G51
B136
Red1 (0.4%)
Green51 (20%)
Blue136 (53.3%)
Hue217.78°
Saturation (HSL)98.54%
Lightness26.86%
Dominant channelBlue
Hex per channelR 01 · G 33 · B 88

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Every value on this page was computed from “hex 013388” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.