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Recognised as Colour

#1C243B

  • #1C243B
  • Blue
  • Dark
  • Nearest: Black

#1C243B is a blue with RGB values 28, 36, 59 and HSL 225°, 36%, 17%. It is a dark colour, so white text on it reaches 15.4:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#1C243B#1C243B
HEX#1C243B
RGBrgb(28, 36, 59)
RGB (0–1)0.1098, 0.1412, 0.2314
RGB percentages11%, 14.1%, 23.1%
HSLhsl(224.5, 35.6%, 17.1%)
HSV / HSBhsv(224.5, 52.5%, 23.1%)
CMYK52.5%, 39%, 0%, 76.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,844,283
CSS custom property--colour: #1C243B;

Brightness & contrast

Relative luminance0.01824WCAG 2.x, 0 is black and 1 is white
Perceived brightness37.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.39:1
Contrast with white15.39:1WCAG normal text: AAA
Contrast with black1.36:1WCAG normal text: Fail
Greyscale equivalent#242424
Inverted#E3DBC4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1C263Cno red cones; affects about 1% of men; ΔE 1.4 from the original
Deuteranopia#19233Ano green cones; the most common form, about 1% of men; ΔE 0.9 from the original
Tritanopia#11292Cno blue cones; rare, and affects men and women equally; ΔE 16.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.39:1WCAG large text: AAA
Contrast with black, large text1.36:1WCAG large text: Fail

Named colours

Black · ΔE 21.9Dark slate grey · ΔE 26Dim grey · ΔE 34.1Dark slateblue · ΔE 37.9Slate grey · ΔE 39.2Steel blue · ΔE 42.1
Nearest named CSS colourBlack (#000000)ΔE 21.94, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3B331C
Analogous#1C343B, #231C3B
Triadic#3B1C24, #243B1C
Split complementary#3B231C, #343B1C
Tetradic#3B1C34, #3B331C, #1C3B23

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6A7FB9
Lighter +30%#4D63A3
Lighter +20%#3D4E80
Lighter +10%#2C395E
Darker −10%#0C0F18
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#111F46
Less saturated −25%#272930

Channel breakdown

R28
G36
B59
Red28 (11%)
Green36 (14.1%)
Blue59 (23.1%)
Hue224.52°
Saturation (HSL)35.63%
Lightness17.06%
Dominant channelBlue
Hex per channelR 1C · G 24 · B 3B

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Every value on this page was computed from “1c243b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.