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Recognised as Colour

#18354C

  • #18354C
  • Blue
  • Dark
  • Nearest: Dark slate grey

#18354C is a blue with RGB values 24, 53, 76 and HSL 207°, 52%, 20%. It is a dark colour, so white text on it reaches 12.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#18354C#18354C
HEX#18354C
RGBrgb(24, 53, 76)
RGB (0–1)0.0941, 0.2078, 0.298
RGB percentages9.4%, 20.8%, 29.8%
HSLhsl(206.5, 52%, 19.6%)
HSV / HSBhsv(206.5, 68.4%, 29.8%)
CMYK68.4%, 30.3%, 0%, 70.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,586,508
CSS custom property--colour: #18354C;

Brightness & contrast

Relative luminance0.03262WCAG 2.x, 0 is black and 1 is white
Perceived brightness49.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.71:1
Contrast with white12.71:1WCAG normal text: AAA
Contrast with black1.65:1WCAG normal text: Fail
Greyscale equivalent#303030
Inverted#E7CAB3

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2B354Dno red cones; affects about 1% of men; ΔE 5.9 from the original
Deuteranopia#24304Cno green cones; the most common form, about 1% of men; ΔE 6.8 from the original
Tritanopia#003B3Dno blue cones; rare, and affects men and women equally; ΔE 17.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.71:1WCAG large text: AAA
Contrast with black, large text1.65:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 19.3Black · ΔE 27.4Dim grey · ΔE 29.2Slate grey · ΔE 32.5Steel blue · ΔE 34.8Light slate grey · ΔE 35.4
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 19.35, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4C2F18
Analogous#184C49, #181B4C
Triadic#4C1835, #354C18
Split complementary#4C181B, #4C4918
Tetradic#49184C, #4C2F18, #1B4C18

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#629ECE
Lighter +30%#3D86C0
Lighter +20%#306B9A
Lighter +10%#245073
Darker −10%#0C1A25
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0B3659
Less saturated −25%#253440

Channel breakdown

R24
G53
B76
Red24 (9.4%)
Green53 (20.8%)
Blue76 (29.8%)
Hue206.54°
Saturation (HSL)52%
Lightness19.61%
Dominant channelBlue
Hex per channelR 18 · G 35 · B 4C

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Every value on this page was computed from “18354c” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.