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@hellosmithy
Last active September 30, 2015 10:18
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Cross-browser alpha transparent background CSS (rgba) Stylus mixin
// background transparency
background-transparency(color, alpha = 1)
ms-color = argb(color, alpha)
background rgb(color)
background rgba(color, alpha)
.lt-ie8 &
zoom 1
.lt-ie9 &
background transparent
filter s('progid:DXImageTransform.Microsoft.gradient(startColorstr=%s,endColorstr=%s)', ms-color, ms-color)
&:nth-child(n)
filter none
hex(decimal)
hex-value = ('0') ('1') ('2') ('3') ('4') ('5') ('6') ('7') ('8') ('9') ('A') ('B') ('C') ('D') ('E') ('F')
unquote(hex-value[floor(decimal / 16)] + hex-value[floor(decimal % 16)])
argb(color, alpha = 1)
unquote('#') + hex(alpha * 255) + hex(red(color)) + hex(green(color)) + hex(blue(color))
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