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Recognised as Colour

#133C80

  • #133C80
  • Blue
  • Dark
  • Nearest: Dark slateblue

#133C80 is a blue with RGB values 19, 60, 128 and HSL 217°, 74%, 29%. It is a dark colour, so white text on it reaches 10.6:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#133C80#133C80
HEX#133C80
RGBrgb(19, 60, 128)
RGB (0–1)0.0745, 0.2353, 0.502
RGB percentages7.5%, 23.5%, 50.2%
HSLhsl(217.4, 74.1%, 28.8%)
HSV / HSBhsv(217.4, 85.2%, 50.2%)
CMYK85.2%, 53.1%, 0%, 49.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,260,672
CSS custom property--colour: #133C80;

Brightness & contrast

Relative luminance0.04929WCAG 2.x, 0 is black and 1 is white
Perceived brightness63.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.58:1
Contrast with white10.58:1WCAG normal text: AAA
Contrast with black1.99:1WCAG normal text: Fail
Greyscale equivalent#383838
Inverted#ECC37F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0E4482no red cones; affects about 1% of men; ΔE 6.4 from the original
Deuteranopia#003A7Fno green cones; the most common form, about 1% of men; ΔE 1.6 from the original
Tritanopia#004D58no blue cones; rare, and affects men and women equally; ΔE 42.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.58:1WCAG large text: AAA
Contrast with black, large text1.99:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 13.5Midnight blue · ΔE 22.5Rebecca purple · ΔE 30.6Steel blue · ΔE 32.8Slate blue · ΔE 33.3Royal blue · ΔE 33.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.46, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#805713
Analogous#137380, #201380
Triadic#80133C, #3C8013
Split complementary#802013, #738013
Tetradic#801373, #805713, #138020

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#75A1EA
Lighter +30%#4883E4
Lighter +20%#2066D9
Lighter +10%#1A51AC
Darker −10%#0C2754
Darker −20%#061227
Darker −30%#000000
Darker −40%#000000
More saturated +25%#013792
Less saturated −25%#25416E

Channel breakdown

R19
G60
B128
Red19 (7.5%)
Green60 (23.5%)
Blue128 (50.2%)
Hue217.43°
Saturation (HSL)74.15%
Lightness28.82%
Dominant channelBlue
Hex per channelR 13 · G 3C · B 80

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Every value on this page was computed from “133c80” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.