This preset legend has lower range in white. Refer attached image , colour map.JPG
If this does not help, click on Scalar plot > settings > Legend > change color by legend pick > in the left side legends pick the color you want to change for example blue , then select the color you want to replace the selected color with required color, for example white, and click OK. Refer attached images, legend color 1.JPG & legend color 2.JPG.
This preset legend has lower range in white. Refer attached image , colour map.JPG
If this does not help, click on Scalar plot > settings > Legend > change color by legend pick > in the left side legends pick the color you want to change for example blue , then select the color you want to replace the selected color with required color, for example white, and click OK. Refer attached images, legend color 1.JPG & legend color 2.JPG.