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<!DOCTYPE html> <html> <head> <style> #img1 { filter: grayscale(1); } #img2 { filter: grayscale(60%); } #img3 { filter: grayscale(0.4); } </style> </head> <body> <h1>grayscale() 函数</h1> <p>grayscale(1):</p> <img id="img1" src="/i/photo/tulip.jpg" alt="Tulip" width="300" height="300"> <p>grayscale(60%):</p> <img id="img2" src="/i/photo/tulip.jpg" alt="Tulip" width="300" height="300"> <p>grayscale(0.4):</p> <img id="img3" src="/i/photo/tulip.jpg" alt="Tulip" width="300" height="300"> <p>原始图像：</p> <img src="/i/photo/tulip.jpg" alt="Tulip" width="300" height="300"> </body> </html>