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Recognised as Colour

#01539D

  • #01539D
  • Blue
  • Dark
  • Nearest: Dark slateblue

#01539D is a blue with RGB values 1, 83, 157 and HSL 208°, 99%, 31%. It is a dark colour, so white text on it reaches 7.7:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#01539D#01539D
HEX#01539D
RGBrgb(1, 83, 157)
RGB (0–1)0.0039, 0.3255, 0.6157
RGB percentages0.4%, 32.5%, 61.6%
HSLhsl(208.5, 98.7%, 31%)
HSV / HSBhsv(208.5, 99.4%, 61.6%)
CMYK99.4%, 47.1%, 0%, 38.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer86,941
CSS custom property--colour: #01539D;

Brightness & contrast

Relative luminance0.08627WCAG 2.x, 0 is black and 1 is white
Perceived brightness82.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.71:1
Contrast with white7.71:1WCAG normal text: AAA
Contrast with black2.73:1WCAG normal text: Fail
Greyscale equivalent#474747
Inverted#FEAC62

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#295AA0no red cones; affects about 1% of men; ΔE 4.6 from the original
Deuteranopia#004D9Cno green cones; the most common form, about 1% of men; ΔE 4.7 from the original
Tritanopia#006570no blue cones; rare, and affects men and women equally; ΔE 43.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.71:1WCAG large text: AAA
Contrast with black, large text2.73:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 18.5Steel blue · ΔE 25.5Cornflower blue · ΔE 26.9Royal blue · ΔE 29Dodgerblue · ΔE 29.7Midnight blue · ΔE 30.4
Nearest named CSS colourDark slateblue (#483D8B)ΔE 18.48, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9D4B01
Analogous#019D99, #01059D
Triadic#9D0153, #539D01
Split complementary#9D0105, #9D9901
Tetradic#99019D, #9D4B01, #059D01

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6CB9FE
Lighter +30%#39A1FE
Lighter +20%#0788FD
Lighter +10%#016ED0
Darker −10%#01386A
Darker −20%#001D38
Darker −30%#000305
Darker −40%#000000
More saturated +25%#00539E
Less saturated −25%#155289

Channel breakdown

R1
G83
B157
Red1 (0.4%)
Green83 (32.5%)
Blue157 (61.6%)
Hue208.46°
Saturation (HSL)98.73%
Lightness30.98%
Dominant channelBlue
Hex per channelR 01 · G 53 · B 9D

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Every value on this page was computed from “01539d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.