Propose color DiffText

[eeeXun]

Is your feature request related to a problem? Please describe.
Thanks to Diff color add DiffAdd, DiffDelete and DiffChange. But it is still missing DiffText.

Describe the solution you'd like
I use this web site to mix the color.
For dark background, I mix background #282828 and yellow #fabd2f with the ratio 2:1. This generates #6f5a2b
For light background, I mix background #fbf1c7 and yellow #b57614 with the ratio 2:1. This generates #e3c78b

Additional context
The result of dark background

The result of light background

[eeeXun]

Update

dark hard: #1d2021 #fabd2f, 2:1 -> #675425

dark normal: #282828 #fabd2f, 2:1 -> #6f5a2b

dark soft: #32302f #fabd2f, 2:1 -> #755f2f

light hard: #f9f5d7 #b57614, 2:1 -> #e2cb96

light normal: #fbf1c7 #b57614, 2:1 -> #e3c88b

light soft: #f2e5bc #b57614, 2:1 -> #ddc083