Colour

#183F64

#183F64
Blue
Dark
Nearest: Dark slate grey

#183F64 is a blue with RGB values 24, 63, 100 and HSL 209°, 61%, 24%. It is a dark colour, so white text on it reaches 10.9:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#183F64#183F64

HEX#183F64

RGBrgb(24, 63, 100)

RGB (0–1)0.0941, 0.2471, 0.3922

RGB percentages9.4%, 24.7%, 39.2%

HSLhsl(209.2, 61.3%, 24.3%)

HSV / HSBhsv(209.2, 76%, 39.2%)

CMYK76%, 37%, 0%, 60.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,589,092

CSS custom property--colour: #183F64;

Brightness & contrast

Relative luminance0.04669WCAG 2.x, 0 is black and 1 is white

Perceived brightness60.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 10.86:1

Contrast with white10.86:1WCAG normal text: AAA

Contrast with black1.93:1WCAG normal text: Fail

Greyscale equivalent#393939

Inverted#E7C09B

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#2E4166no red cones; affects about 1% of men; ΔE 4.8 from the original

Deuteranopia#233A63no green cones; the most common form, about 1% of men; ΔE 5.4 from the original

Tritanopia#00484Cno blue cones; rare, and affects men and women equally; ΔE 25.3 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text10.86:1WCAG large text: AAA

Contrast with black, large text1.93:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 25.7 Steel blue · ΔE 27.8 Dark slateblue · ΔE 31 Slate grey · ΔE 31.1 Dim grey · ΔE 31.8 Light slate grey · ΔE 33.6

Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 25.65, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#643D18

Analogous#186463, #181964

Triadic#64183F, #3F6418

Split complementary#641819, #646318

Tetradic#631864, #643D18, #196418

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#6CA5DC

Lighter +30%#438CD2

Lighter +20%#2C73B6

Lighter +10%#22598D

Darker −10%#0E253B

Darker −20%#040B12

Darker −30%#000000

Darker −40%#000000

More saturated +25%#083F74

Less saturated −25%#283F54

Channel breakdown

R24

G63

B100

Red24 (9.4%)

Green63 (24.7%)

Blue100 (39.2%)

Hue209.21°

Saturation (HSL)61.29%

Lightness24.31%

Dominant channelBlue

Hex per channelR 18 · G 3F · B 64

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#183F64

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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