RGB to HEX

RGB 和 HEX 都表示相同的颜色信息，但格式不同。RGB 使用三个十进制数字 (0-255) 来表示红、绿、蓝三色成分。HEX 使用六个字符的十六进制字符串，其中每对字符以 16 进制 (00-FF) 表示相同的成分。正确渲染时，它们会产生相同的颜色。

HEX is commonly used in CSS and HTML for its compact format and widespread browser support. RGB is useful when you need to dynamically adjust color values with JavaScript, or when working with opacity using the rgba() format. Many developers prefer HEX for static colors and RGB/RGBA for dynamic or semi-transparent colors.

3-character HEX codes are shorthand for 6-character codes where each pair of characters is identical. For example, #F00 is equivalent to #FF0000, and #123 is equivalent to #112233. This shorthand works when both characters in each RGB pair are the same, reducing the code length while maintaining the same color value.

HEX codes can represent the same 16,777,216 colors as 8-bit RGB values (256 × 256 × 256). However, HEX doesn't natively support alpha (transparency) channels, unlike the rgba() format. For transparent colors, you would need to use RGBA or the 8-character HEX format with alpha (#RRGGBBAA) which is supported in modern browsers.

此转换器在十进制 RGB 值和十六进制表示之间进行精确的数学转换，确保 8 位 RGB 色彩空间（值 0-255）的 100% 准确度。转换具有确定性，这意味着相同的 RGB 输入始终会产生相同的十六进制输出，符合 Web 浏览器和设计软件中使用的行业标准。