你就没设置颜色呀
"<table bgcolor=#2b3042 style='border-radius:7px;' width=100% height=10px border=0 cellspacing=0 cellpadding=0><tr><td style='border-radius:7px;background: linear-gradient(to left, rgb(16,192,196),rgb(41,128,185));' width=" + round(D3 / (D3 + K3) * 100, 2) + "% height=14px></td><td width=" + round(K3 / (D3 + K3) * 100, 2) + "% height=10px>" + round(D3 / (D3 + K3) * 100, 2) + "%</td></tr></table>"
参考下,直接放到公式里面