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256 SHADES of @loopinfinito R, G and B

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@almirfilho globo.com loop infinito zofe @caio_gondim booking.com loop infinito zofe

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zone of front-enders zofe.com.br @danielfilho @rafaelrinaldi @brunopassos

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It is important to view knowledge as sort of a semantic tree - make sure you understand the fundamental principles, ie the trunk and big branches, before you get into the leaves/details or there is nothing for them to hang on to.

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COLORS m o d a f o k i n g

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w h a t i s a COLOR

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light spectrum

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sun spectrum

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object color

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metal color

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retina rods and cones

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yellow

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iphone retina screen

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yellow

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this is a LIE

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everything is MATH

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256? why

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2 = 256 1 byte = 8bits 8

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00 FF hexadecimal system to 0 255 decimal system to

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#BADA55 red green blue hex color

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#BADA55 16*16 256 * 256 * 256 16.777.216 colors 16*16 16*16

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#FF0000

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#00FF00

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#0000FF

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#FFFF00

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#000000

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#666666

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#CCCCCC

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#FFFFFF

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black or white?

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getContrast50 = (hexcolor) -> hex = parseInt hexcolor, 16 if hex > 0xffffff/2 then 'black' else 'white' 50% contrast

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24ways.org/2010/calculating-color-contrast YIQ color space 50% contrast

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blend darken lighten saturate desaturate complement invert spin grayscale mix tint shade luminosity contrast transparentify stylus color functions

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p { color: #BADA55 + #C0FFEE; border-color: #770000 * #003300; } sass color operations p { color: white; border-color: black; } outputs

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c o l o r MODEL

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RGB

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CMY

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HSL/HSV

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c o l o r WHEEL

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n e w t o n

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Isaac Newton's color wheel, 1666

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Goethe color wheel

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Johannes Itten's color wheel

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Painter color wheel

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Subtractive color wheel

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RGB cube

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yellow red fuchsia blue aqua lime

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HARMONY c o l o r s w i t h

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monochromatic

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wilsonminer.com

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thenutone.com

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zample.me

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Picasso, Portrait of Angel Fernandez de Soto, 1903

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analogous

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whoorayrecords.com

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ecoki.com

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bigtop.it

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Rembrandt, Self Portrait with Two Circles, 1660

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Andy Warhol, Mao, 1973

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Picasso, Lá Vie, 1903

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Van Gogh, Wheatfield with Cypresses, 1889

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complementary

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Van Gogh, The Night Café, 1888

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Van Gogh, Irises, 1890

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Edvard Munch, The Scream, 1893

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triadic

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Andy Warhol, Marilyn Diptych, 1962

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Willem de Kooning, Milkmaid, 1983

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tetradic

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Van Gogh, Café Terrace at Night, 1888

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Ellsworth kelly, Red Orange White Green Blue, 1968

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split complementary

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Mark Rhotko

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guideline != rule

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c o l o r FEELING

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love, drama, dynamism, power, passion, blood

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red logos

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energy, warning, enthusiasm, creativity, shock

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orange logos

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sunshine, caution, vibrancy, happiness, alert

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yellow logos

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nature, wealth, stability, environment, relaxation

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green logos

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calm, intelligence, honesty, depression, openness

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blue logos

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purity, truth, perfection, light, sacredness

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white logos

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mystery, death, elegance, formality

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black logos

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c o l o r ACCESSIBILITY

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contrast

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design for elderly users low quality monitors bad lightning

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good bad http://www.w3.org/WAI/wcag-curric/sam26-0.htm

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http://www.laspositascollege.edu/accessibility/contrast-example.php good bad

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W3C Content Accessibility Guidelines

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contrastrebellion.com

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contrast checker

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Luminosity Colour Contrast Ratio Analyser

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Colour Contrast Check

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color blindness

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affects ~8% of people

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protanopia normal deuteranopia tritanopia

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avoid colour-specific instructions http://24ways.org/2012/colour-accessibility/

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don’t rely on color coding http://24ways.org/2012/colour-accessibility/

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don’t rely on color coding http://24ways.org/2012/colour-accessibility/

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http://24ways.org/2012/colour-accessibility/ use a simulator

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Be a neo-pointillist artist

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thank you @loopinfinito ~ @almirfilho @caio_gondim