Recognised as Colour

#646C80

#646C80
Blue
Dark
Nearest: Slate grey

#646C80 is a blue with RGB values 100, 108, 128 and HSL 223°, 12%, 45%. It is a dark colour, so white text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Slate grey.

Colour values

#646C80#646C80

HEX#646C80

RGBrgb(100, 108, 128)

RGB (0–1)0.3922, 0.4235, 0.502

RGB percentages39.2%, 42.4%, 50.2%

HSLhsl(222.9, 12.3%, 44.7%)

HSV / HSBhsv(222.9, 21.9%, 50.2%)

CMYK21.9%, 15.6%, 0%, 49.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer6,581,376

CSS custom property--colour: #646C80;

Brightness & contrast

Relative luminance0.14993WCAG 2.x, 0 is black and 1 is white

Perceived brightness108.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.25:1

Contrast with white5.25:1WCAG normal text: AA

Contrast with black4:1WCAG normal text: Fail

Greyscale equivalent#6C6C6C

Inverted#9B937F

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#666D81no red cones; affects about 1% of men; ΔE 0.6 from the original

Deuteranopia#646B80no green cones; the most common form, about 1% of men; ΔE 0.8 from the original

Tritanopia#5D7073no blue cones; rare, and affects men and women equally; ΔE 11.3 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text5.25:1WCAG large text: AAA

Contrast with black, large text4:1WCAG large text: AA

Named colours

Slate grey · ΔE 8.3 Light slate grey · ΔE 11 Dim grey · ΔE 12.2 Gray · ΔE 14.6 Dark slate grey · ΔE 21.3 Steel blue · ΔE 22

Nearest named CSS colourSlate grey (#708090)ΔE 8.28, clearly different but related

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#807864

Analogous#647A80, #6A6480

Triadic#80646C, #6C8064

Split complementary#806A64, #7A8064

Tetradic#80647A, #807864, #64806A

Tints, shades & saturation

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

Lighter +40%#D3D6DD

Lighter +30%#B7BBC6

Lighter +20%#9AA0B0

Lighter +10%#7D859A

Darker −10%#4E5463

Darker −20%#373C47

Darker −30%#21242A

Darker −40%#0B0B0D

More saturated +25%#48609D

Less saturated −25%#727272

Channel breakdown

R100

G108

B128

Red100 (39.2%)

Green108 (42.4%)

Blue128 (50.2%)

Hue222.86°

Saturation (HSL)12.28%

Lightness44.71%

Dominant channelBlue

Hex per channelR 64 · G 6C · B 80

Keep nerding

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

#646C80

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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