I'm trying to follow Google material design guidelines.
I use the same settings for text color but the text is hard to read because in the examples they have an almost white background.
The standard alpha value for text on a white background is 87% (#000000).
Secondary text, which is lower in the visual hierarchy, should have an alpha value of 54% (#000000).
Text hints for users, like those in text fields and labels, have an even lower visual prominence and should have an alpha value of 26% (#000000).
My background color is #efefef and the color of label text is black with 26% opacity so it's hard to read. Do you have any suggestion on how to adjust the color of text (maybe a general rule) so I can use this background.