在javascript/nodejs中从表中查找最接近的RGB值

// RGB表格
const rgbTable = [
  { R: 255, G: 0, B: 0 },
  { R: 0, G: 255, B: 0 },
  { R: 0, G: 0, B: 255 },
  // 其他RGB值...
];

// 查找最接近的RGB值
function findClosestRGB(targetRGB) {
  let closestRGB = null;
  let minDifference = Infinity;

  for (const rgb of rgbTable) {
    const difference = calculateDifference(targetRGB, rgb);
    if (difference < minDifference) {
      minDifference = difference;
      closestRGB = rgb;
    }
  }

  return closestRGB;
}

// 计算RGB值之间的差异（欧几里得距离）
function calculateDifference(rgb1, rgb2) {
  const diffR = rgb1.R - rgb2.R;
  const diffG = rgb1.G - rgb2.G;
  const diffB = rgb1.B - rgb2.B;
  return Math.sqrt(diffR ** 2 + diffG ** 2 + diffB ** 2);
}

// 示例用法
const targetRGB = { R: 128, G: 128, B: 128 };
const closestRGB = findClosestRGB(targetRGB);
console.log(closestRGB);