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Colour

#1C3974

  • #1C3974
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1C3974 is a blue with RGB values 28, 57, 116 and HSL 220°, 61%, 28%. It is a dark colour, so white text on it reaches 11.1:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1C3974#1C3974
HEX#1C3974
RGBrgb(28, 57, 116)
RGB (0–1)0.1098, 0.2235, 0.4549
RGB percentages11%, 22.4%, 45.5%
HSLhsl(220.2, 61.1%, 28.2%)
HSV / HSBhsv(220.2, 75.9%, 45.5%)
CMYK75.9%, 50.9%, 0%, 54.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,849,716
CSS custom property--colour: #1C3974;

Brightness & contrast

Relative luminance0.04434WCAG 2.x, 0 is black and 1 is white
Perceived brightness60.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.13:1
Contrast with white11.13:1WCAG normal text: AAA
Contrast with black1.89:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#E3C68B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#184076no red cones; affects about 1% of men; ΔE 5.6 from the original
Deuteranopia#003873no green cones; the most common form, about 1% of men; ΔE 3 from the original
Tritanopia#004751no blue cones; rare, and affects men and women equally; ΔE 37.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.13:1WCAG large text: AAA
Contrast with black, large text1.89:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 16.4Midnight blue · ΔE 25.4Steel blue · ΔE 31.9Rebecca purple · ΔE 33.8Slate blue · ΔE 37.9Cornflower blue · ΔE 38.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 16.38, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#74571C
Analogous#1C6574, #2B1C74
Triadic#741C39, #39741C
Split complementary#742B1C, #65741C
Tetradic#741C65, #74571C, #1C742B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7D9DE0
Lighter +30%#537ED6
Lighter +20%#3061C6
Lighter +10%#264D9D
Darker −10%#12254B
Darker −20%#081122
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0A3386
Less saturated −25%#2E3F62

Channel breakdown

R28
G57
B116
Red28 (11%)
Green57 (22.4%)
Blue116 (45.5%)
Hue220.23°
Saturation (HSL)61.11%
Lightness28.24%
Dominant channelBlue
Hex per channelR 1C · G 39 · B 74

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Every value on this page was computed from “1c3974” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.