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Recognised as Colour

#133D89

  • #133D89
  • Blue
  • Dark
  • Nearest: Dark slateblue

#133D89 is a blue with RGB values 19, 61, 137 and HSL 219°, 76%, 31%. It is a dark colour, so white text on it reaches 10.2:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#133D89#133D89
HEX#133D89
RGBrgb(19, 61, 137)
RGB (0–1)0.0745, 0.2392, 0.5373
RGB percentages7.5%, 23.9%, 53.7%
HSLhsl(218.6, 75.6%, 30.6%)
HSV / HSBhsv(218.6, 86.1%, 53.7%)
CMYK86.1%, 55.5%, 0%, 46.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,260,937
CSS custom property--colour: #133D89;

Brightness & contrast

Relative luminance0.05282WCAG 2.x, 0 is black and 1 is white
Perceived brightness66.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.21:1
Contrast with white10.21:1WCAG normal text: AAA
Contrast with black2.06:1WCAG normal text: Fail
Greyscale equivalent#3A3A3A
Inverted#ECC276

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00478Cno red cones; affects about 1% of men; ΔE 8 from the original
Deuteranopia#003C88no green cones; the most common form, about 1% of men; ΔE 1.4 from the original
Tritanopia#00505Dno blue cones; rare, and affects men and women equally; ΔE 46.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.21:1WCAG large text: AAA
Contrast with black, large text2.06:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 11.1Midnight blue · ΔE 19.5Rebecca purple · ΔE 27.1Slate blue · ΔE 28.9Royal blue · ΔE 29.5Medium purple · ΔE 34.4
Nearest named CSS colourDark slateblue (#483D8B)ΔE 11.09, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#895F13
Analogous#137889, #241389
Triadic#89133D, #3D8913
Split complementary#892413, #788913
Tetradic#891378, #895F13, #138924

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7BA4ED
Lighter +30%#4E85E7
Lighter +20%#2266E0
Lighter +10%#1951B6
Darker −10%#0D295C
Darker −20%#07152F
Darker −30%#000103
Darker −40%#000000
More saturated +25%#00389C
Less saturated −25%#274375

Channel breakdown

R19
G61
B137
Red19 (7.5%)
Green61 (23.9%)
Blue137 (53.7%)
Hue218.64°
Saturation (HSL)75.64%
Lightness30.59%
Dominant channelBlue
Hex per channelR 13 · G 3D · B 89

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Every value on this page was computed from “133d89” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.