diff --git a/source/blender/editors/interface/regions/interface_region_tooltip.cc b/source/blender/editors/interface/regions/interface_region_tooltip.cc
index 7ae086e7eda..0d0be125d74 100644
--- a/source/blender/editors/interface/regions/interface_region_tooltip.cc
+++ b/source/blender/editors/interface/regions/interface_region_tooltip.cc
@@ -1044,7 +1044,7 @@ static std::unique_ptr<uiTooltipData> ui_tooltip_data_from_button_or_extra_icon(
 
     uchar rgb_hex_uchar[4];
     rgba_float_to_uchar(rgb_hex_uchar, color);
-    const std::string hex_st = fmt::format("Hex: {:X}{:X}{:X}{:X}",
+    const std::string hex_st = fmt::format("Hex: {:02X}{:02X}{:02X}{:02X}",
                                            int(rgb_hex_uchar[0]),
                                            int(rgb_hex_uchar[1]),
                                            int(rgb_hex_uchar[2]),