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Colour

#1803CB

  • #1803CB
  • Blue
  • Dark
  • Nearest: Medium blue

#1803CB is a blue with RGB values 24, 3, 203 and HSL 246°, 97%, 40%. It is a dark colour, so white text on it reaches 11:1 contrast (AAA for normal text). The nearest named colour is Medium blue.

Colour values

#1803CB#1803CB
HEX#1803CB
RGBrgb(24, 3, 203)
RGB (0–1)0.0941, 0.0118, 0.7961
RGB percentages9.4%, 1.2%, 79.6%
HSLhsl(246.3, 97.1%, 40.4%)
HSV / HSBhsv(246.3, 98.5%, 79.6%)
CMYK88.2%, 98.5%, 0%, 20.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,573,835
CSS custom property--colour: #1803CB;

Brightness & contrast

Relative luminance0.04571WCAG 2.x, 0 is black and 1 is white
Perceived brightness69.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.97:1
Contrast with white10.97:1WCAG normal text: AAA
Contrast with black1.91:1WCAG normal text: Fail
Greyscale equivalent#161616
Inverted#E7FC34

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0046D0no red cones; affects about 1% of men; ΔE 33.5 from the original
Deuteranopia#0032C8no green cones; the most common form, about 1% of men; ΔE 22.2 from the original
Tritanopia#005476no blue cones; rare, and affects men and women equally; ΔE 98.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.97:1WCAG large text: AAA
Contrast with black, large text1.91:1WCAG large text: Fail

Named colours

Medium blue · ΔE 2.3Blue violet · ΔE 22.6Blue · ΔE 23.5Dark violet · ΔE 25.8Dark blue · ΔE 28.3Navy · ΔE 33.5
Nearest named CSS colourMedium blue (#0000CD)ΔE 2.27, below the just-noticeable difference
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B6CB03
Analogous#0352CB, #7C03CB
Triadic#CB1803, #03CB18
Split complementary#CB7C03, #52CB03
Tetradic#CB0352, #B6CB03, #03CB7C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A79CFE
Lighter +30%#7A6AFD
Lighter +20%#4D38FC
Lighter +10%#1F06FB
Darker −10%#120299
Darker −20%#0C0266
Darker −30%#060134
Darker −40%#000002
More saturated +25%#1600CE
Less saturated −25%#2C1DB1

Channel breakdown

R24
G3
B203
Red24 (9.4%)
Green3 (1.2%)
Blue203 (79.6%)
Hue246.3°
Saturation (HSL)97.09%
Lightness40.39%
Dominant channelBlue
Hex per channelR 18 · G 03 · B CB

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Every value on this page was computed from “1803cb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.