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Recognised as Colour

#13133B

  • #13133B
  • Blue
  • Dark
  • Nearest: Dark slateblue

#13133B is a blue with RGB values 19, 19, 59 and HSL 240°, 51%, 15%. It is a dark colour, so white text on it reaches 17.7:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#13133B#13133B
HEX#13133B
RGBrgb(19, 19, 59)
RGB (0–1)0.0745, 0.0745, 0.2314
RGB percentages7.5%, 7.5%, 23.1%
HSLhsl(240, 51.3%, 15.3%)
HSV / HSBhsv(240, 67.8%, 23.1%)
CMYK67.8%, 67.8%, 0%, 76.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,250,107
CSS custom property--colour: #13133B;

Brightness & contrast

Relative luminance0.0092WCAG 2.x, 0 is black and 1 is white
Perceived brightness26.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.74:1
Contrast with white17.74:1WCAG normal text: AAA
Contrast with black1.18:1WCAG normal text: Fail
Greyscale equivalent#161616
Inverted#ECECC4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#001A3Cno red cones; affects about 1% of men; ΔE 8.8 from the original
Deuteranopia#00163Ano green cones; the most common form, about 1% of men; ΔE 6.4 from the original
Tritanopia#001D24no blue cones; rare, and affects men and women equally; ΔE 28.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.74:1WCAG large text: AAA
Contrast with black, large text1.18:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 30Midnight blue · ΔE 30.2Black · ΔE 30.8Dark slate grey · ΔE 41.3Rebecca purple · ΔE 43.1Dim grey · ΔE 46.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 30.03, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3B3B13
Analogous#13273B, #27133B
Triadic#3B1313, #133B13
Split complementary#3B2713, #273B13
Tetradic#3B1327, #3B3B13, #133B27

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5353C7
Lighter +30%#3838AF
Lighter +20%#2C2C88
Lighter +10%#1F1F62
Darker −10%#070714
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#090945
Less saturated −25%#1D1D31

Channel breakdown

R19
G19
B59
Red19 (7.5%)
Green19 (7.5%)
Blue59 (23.1%)
Hue240°
Saturation (HSL)51.28%
Lightness15.29%
Dominant channelBlue
Hex per channelR 13 · G 13 · B 3B

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Every value on this page was computed from “13133b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.