色容差色区图计算方程式 color X Y G11 G12 G22 6500 0.313 0.337 860000 -400000 450000 5000 0.346 0.359 560000 -250000 230000 4000 0.380 0.380 395000 -215000 260000 3500 0.409 0.394 380000 -200000 250000 3000 0.440 0.403 390000 -195000 275000 2700 0.463 0.420 440000 -186000 270000