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Recognised as Colour

#013FD9

  • #013FD9
  • Blue
  • Dark
  • Nearest: Medium slateblue

#013FD9 is a blue with RGB values 1, 63, 217 and HSL 223°, 99%, 43%. It is a dark colour, so white text on it reaches 7.7:1 contrast (AAA for normal text). The nearest named colour is Medium slateblue.

Colour values

#013FD9#013FD9
HEX#013FD9
RGBrgb(1, 63, 217)
RGB (0–1)0.0039, 0.2471, 0.851
RGB percentages0.4%, 24.7%, 85.1%
HSLhsl(222.8, 99.1%, 42.7%)
HSV / HSBhsv(222.8, 99.5%, 85.1%)
CMYK99.5%, 71%, 0%, 14.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer81,881
CSS custom property--colour: #013FD9;

Brightness & contrast

Relative luminance0.08571WCAG 2.x, 0 is black and 1 is white
Perceived brightness87.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.74:1
Contrast with white7.74:1WCAG normal text: AAA
Contrast with black2.71:1WCAG normal text: Fail
Greyscale equivalent#3D3D3D
Inverted#FEC026

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#005CDEno red cones; affects about 1% of men; ΔE 20.5 from the original
Deuteranopia#0049D6no green cones; the most common form, about 1% of men; ΔE 9.2 from the original
Tritanopia#006C88no blue cones; rare, and affects men and women equally; ΔE 85 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.74:1WCAG large text: AAA
Contrast with black, large text2.71:1WCAG large text: Fail

Named colours

Medium slateblue · ΔE 23.9Dark blue · ΔE 24.6Medium blue · ΔE 25.9Blue violet · ΔE 26.2Slate blue · ΔE 27.6Navy · ΔE 27.9
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 23.88, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D99B01
Analogous#01ABD9, #2F01D9
Triadic#D9013F, #3FD901
Split complementary#D92F01, #ABD901
Tetradic#D901AB, #D99B01, #01D92F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A7C0FF
Lighter +30%#759CFE
Lighter +20%#4278FE
Lighter +10%#0F54FE
Darker −10%#0130A6
Darker −20%#012273
Darker −30%#001341
Darker −40%#00040E
More saturated +25%#003FDA
Less saturated −25%#1C4BBE

Channel breakdown

R1
G63
B217
Red1 (0.4%)
Green63 (24.7%)
Blue217 (85.1%)
Hue222.78°
Saturation (HSL)99.08%
Lightness42.75%
Dominant channelBlue
Hex per channelR 01 · G 3F · B D9

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Every value on this page was computed from “013fd9” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.