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function shadeBlend(p, c0, c1) {
  var n = p < 0 ? p * -1 : p, u = Math.round, w = parseInt;
  if (c0.length > 7) {
    var f = c0.split(","), t = (c1 ? c1 : p < 0 ? "rgb(0,0,0)" : "rgb(255,255,255)").split(","), R = w(f[0].slice(4)),
      G = w(f[1]), B = w(f[2]);
    return "rgb(" + (u((w(t[0].slice(4)) - R) * n) + R) + "," + (u((w(t[1]) - G) * n) + G) + "," + (u((w(t[2]) - B) * n) + B) + ")"
  } else {
    var f = w(c0.slice(1), 16), t = w((c1 ? c1 : p < 0 ? "#000000" : "#FFFFFF").slice(1), 16), R1 = f >> 16,
      G1 = f >> 8 & 0x00FF, B1 = f & 0x0000FF;
    return "#" + (0x1000000 + (u(((t >> 16) - R1) * n) + R1) * 0x10000 + (u(((t >> 8 & 0x00FF) - G1) * n) + G1) * 0x100 + (u(((t & 0x0000FF) - B1) * n) + B1)).toString(16).slice(1)
  }
}