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Recognised as Colour

#183CCD

  • #183CCD
  • Blue
  • Dark
  • Nearest: Dark blue

#183CCD is a blue with RGB values 24, 60, 205 and HSL 228°, 79%, 45%. It is a dark colour, so white text on it reaches 8.2:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#183CCD#183CCD
HEX#183CCD
RGBrgb(24, 60, 205)
RGB (0–1)0.0941, 0.2353, 0.8039
RGB percentages9.4%, 23.5%, 80.4%
HSLhsl(228.1, 79%, 44.9%)
HSV / HSBhsv(228.1, 88.3%, 80.4%)
CMYK88.3%, 70.7%, 0%, 19.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,588,429
CSS custom property--colour: #183CCD;

Brightness & contrast

Relative luminance0.07834WCAG 2.x, 0 is black and 1 is white
Perceived brightness84.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.18:1
Contrast with white8.18:1WCAG normal text: AAA
Contrast with black2.57:1WCAG normal text: Fail
Greyscale equivalent#3F3F3F
Inverted#E7C332

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0058D1no red cones; affects about 1% of men; ΔE 20.7 from the original
Deuteranopia#0046CAno green cones; the most common form, about 1% of men; ΔE 9.5 from the original
Tritanopia#006580no blue cones; rare, and affects men and women equally; ΔE 80.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.18:1WCAG large text: AAA
Contrast with black, large text2.57:1WCAG large text: Fail

Named colours

Dark blue · ΔE 21.7Medium slateblue · ΔE 22.1Slate blue · ΔE 23.9Navy · ΔE 24.4Royal blue · ΔE 25.4Blue violet · ΔE 27.6
Nearest named CSS colourDark blue (#00008B)ΔE 21.72, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CDA918
Analogous#1896CD, #4F18CD
Triadic#CD183C, #3CCD18
Split complementary#CD4F18, #96CD18
Tetradic#CD1896, #CDA918, #18CD4F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BAC6F7
Lighter +30%#8CA1F2
Lighter +20%#5F7BEC
Lighter +10%#3155E7
Darker −10%#132F9F
Darker −20%#0D2172
Darker −30%#081444
Darker −40%#030716
More saturated +25%#002EE5
Less saturated −25%#354DB0

Channel breakdown

R24
G60
B205
Red24 (9.4%)
Green60 (23.5%)
Blue205 (80.4%)
Hue228.07°
Saturation (HSL)79.04%
Lightness44.9%
Dominant channelBlue
Hex per channelR 18 · G 3C · B CD

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Every value on this page was computed from “183ccd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.