It's all about gradation, it's different combinations of colours.

都与色彩渐变有关，是不同色彩组合。

And with " sfumato, " he created subtle gradations between colors that softened the edges of the forms he depicted.

他也用 “晕涂法” 创造出颜色之间细微渐层，让他描绘形状有较柔和边缘。

But human eyes excel in other ways. They are in fact remarkably discerning in color gradation.

然而，人眼在其它方面有优越之处。事实上，人眼对颜色梯度具有非凡分辨能。

Rouge Gradient, I'll do a lip gradation.

这是 Rouge Gradient。我将打造一款渐变唇。

He bent back her head across his arm and kissed her, softly at first, and then with a swift gradation of intensity that made her cling to him as the only solid thing in a dizzy swaying world.

使她紧紧地贴在他身上，仿佛整个大地都在摇动，令人头晕目眩，只有他才是牢靠。