Responsive Web Design Certification – a Set of Colored Markers
Hex color
Hex color values start with a # character and take six characters from 0-9 and A-F. The first pair of characters represent red, the second pair represent green, and the third pair represent blue. For example, #4B5320.
00: 0%, FF: 100%
HSL
hue red is at 0 degrees, green is at 120 degrees, and blue is at 240 degrees.
Saturation is the intensity of a color from 0%, or gray, to 100% for pure color. You must add the percent sign % to the saturation and lightness values.
Lightness is how bright a color appears, from 0%, or complete black, to 100%, complete white, with 50% being neutral.
Gradient
linear-gradient function은 image 요소를 만들어내므로 background-color가 아닌 background 속성과 같이 쓰임
both offsetX and offsetY accept number values in px and other CSS units
a positive offsetX value moves the shadow right and a negative value moves it left
a positive offsetY value moves the shadow down and a negative value moves it up
if you want a value of zero (0) for any or both offsetX and offsetY, you don’t need to add a unit. Every browser understands that zero means no change.
The height and width of the shadow is determined by the height and width of the element it’s applied to.