Color¶
Estimated time to read: 3 minutes
Color Theory in Design¶
Color theory is the study of how colors interact with each other and how they affect our perception
Concepts¶
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A is the set of colors chosen for a specific design or project.
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Analogous color schemes
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Complementary color schemes
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triadic color scheme
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monochromatic color scheme
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are predefined color names recognized by browsers. Named colors in CSS are a collection of standard color names like red, blue, yellow, aqua, fuchsia, black, and so on.
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the primary colors of light: RGB(自发光，additive color model); the primary colors of paint: RYB（反射光，减色）;
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编程主要是加色(
rgb(0,0,0), rgba(0-255,0-255,0-255,0-1)，因为代码都是通过屏幕发光呈现的。平板是加色，kindle是减色。 -
HSL stands for Hue[0-360], Saturation[0-100%], and Lightness[0-100%]
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The hue is the color type
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Saturation refers to the intensity or purity of the color.
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Lightness determines how light or dark the color is
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hsl(hue saturation lightness), hsl(hue saturation lightness / alpha), hsla(hue, saturation, lightness, alpha), 数学上的关系是：$H \times S \times L$ 的连续组合，完整映射了 $R \times G \times B$ 的全部空间。 -
A hex code (short for hexadecimal code) is a six-character string used to represent colors in the RGB color model. The first two characters represent the red value, the next two represent green, and the last two represent blue.
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hex 16进制和rgb的255有什么对应关系？
F * 16 + F = 240 + 15 = 255 -
#FFFFFF(white) can be written as#FFF. -
Gradients in CSS allow you to create smooth transitions between two or more specified colors.
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Linear gradients(
linear-gradient(to right/45deg, red 20%, blue, ...);) create a gradual blend between colors along a straight line. linear-gradient function actually creates an image element -
Radial gradients(
radial-gradient(circle/ellipse at top left, red, blue)), on the other hand, create circular or elliptical gradients that radiate from a central point. -
background: linear-gradient(to right, red 20%, yellow 40%, blue 80%); 为什么数值加起来不是100？ it means the color stops at precise positions. 0-20%是纯红，20-40%是红变黄，40%位置纯黄，40-80%是黄变蓝，80%及以后是纯蓝。