Dokumentacija HotXLS
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TGridToXLS
IXLSWorkbook
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Classic XLS color model
Conclusion
HotXLS does not add ThemeColor / TintAndShade members to the classic lxHandle XLS facade. Those članovi belong to the newer OOXML style model and do not have a real, round-trippable BIFF .xls storage target. Adding them to the old XLS API would create a misleading surface: values would either be lost on save or reduced to an approximate palette color
The classic lxHandle XLS API writes BIFF .xls files. BIFF stores font, border, and fill colors through palette indexes, not Office theme color slots
Use Color, ColorIndex, and Workbook.Colors
Use Color when you want to assign an RGB value. HotXLS maps that RGB value to the current workbook palette. Use ColorIndex when you want to address a palette slot directly. Use IXLSWorkbook.Colors to customize palette entries
Theme colors and tint/shade
ThemeColor and TintAndShade are OOXML .xlsx style concepts. The classic XLS facade does not expose those properties because a BIFF workbook has no equivalent theme/tint storage that Excel can round-trip as theme metadata
If source code uses theme colors and the target file is .xls, resolve the theme/tint combination to an RGB color first, then assign Color or a custom palette entry. If the theme relationship must remain editable in Excel, use the XLSX facade (lxHandleX) and its theme-aware style properties
Primjer
This example customizes a palette slot and uses it for a cell fill in a classic XLS workbook
Workbook.Colors[8, 0] := RGB(42, 107, 191);
Workbook.Worksheets[1].Range['A1', 'D1'].Interior.ColorIndex := 8;
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