The most easiest method I can suggest you is VBA (Macro).
Private Sub Workbook_Open()
Dim xsheet As Worksheet
For Each xsheet In ThisWorkbook.Worksheets
ThisWorkbook.Sheets.Select
With Range(Cells(1, 1), Cells(1048576, 5000))
.Interior.Color = vbCyan
.Font.Name = "Calibri"
.Font.Size = "11"
.Font.Color = vbWhite
End With
Next xsheet
End Sub
How it works:
- Press
Alt+F11
to open VB editor.
- Find & Click the
This Workbook
Icon.
- Select
Workbook
from left Dropdown & Open
from right Dropdown.
- Copy & Paste lines from
ThisWorkbook.Sheets.Select
to End With
& Save
the Workbook.
Next time when you open the Workbook, you find the new look.
Note, Sheet's dimension, Interior & Font Color as well as Font name & size are editable.
You could change the Normal Style to have a Fill that is black and Font that is white. Unfortunately, you won't be able to see the gridlines if you do that. You can give the rest of the interface a dark theme using Options | General | Personalize your copy of Microsoft Office | Office Theme | Black. – Blackwood – 2018-09-04T01:58:01.837