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Recognised as Colour

#1C3863

  • #1C3863
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1C3863 is a blue with RGB values 28, 56, 99 and HSL 216°, 56%, 25%. It is a dark colour, so white text on it reaches 11.7:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1C3863#1C3863
HEX#1C3863
RGBrgb(28, 56, 99)
RGB (0–1)0.1098, 0.2196, 0.3882
RGB percentages11%, 22%, 38.8%
HSLhsl(216.3, 55.9%, 24.9%)
HSV / HSBhsv(216.3, 71.7%, 38.8%)
CMYK71.7%, 43.4%, 0%, 61.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,849,443
CSS custom property--colour: #1C3863;

Brightness & contrast

Relative luminance0.03976WCAG 2.x, 0 is black and 1 is white
Perceived brightness56.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.7:1
Contrast with white11.7:1WCAG normal text: AAA
Contrast with black1.8:1WCAG normal text: Fail
Greyscale equivalent#353535
Inverted#E3C79C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#243C65no red cones; affects about 1% of men; ΔE 2.4 from the original
Deuteranopia#193562no green cones; the most common form, about 1% of men; ΔE 2.1 from the original
Tritanopia#004248no blue cones; rare, and affects men and women equally; ΔE 29 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.7:1WCAG large text: AAA
Contrast with black, large text1.8:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 25.8Steel blue · ΔE 30.6Dark slate grey · ΔE 31.1Midnight blue · ΔE 34.6Slate grey · ΔE 35.1Dim grey · ΔE 35.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 25.78, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#63471C
Analogous#1C5C63, #231C63
Triadic#631C38, #38631C
Split complementary#63241C, #5C631C
Tetradic#631C5C, #63471C, #1C6324

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#739BD8
Lighter +30%#4C7ECC
Lighter +20%#3265B3
Lighter +10%#274E8B
Darker −10%#11223B
Darker −20%#060B13
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0C3573
Less saturated −25%#2C3B53

Channel breakdown

R28
G56
B99
Red28 (11%)
Green56 (22%)
Blue99 (38.8%)
Hue216.34°
Saturation (HSL)55.91%
Lightness24.9%
Dominant channelBlue
Hex per channelR 1C · G 38 · B 63

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Every value on this page was computed from “1c3863” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.