Inside message use original senders colors.

Telegram/SourceFiles/history/history_item.cpp

@@ -1235,6 +1235,22 @@ uint8 HistoryItem::colorIndex() const {
 	Unexpected("No displayFrom and no displayHiddenSenderInfo.");
 }
 
+PeerData *HistoryItem::contentColorsFrom() const {
+	if (const auto forwarded = Get<HistoryMessageForwarded>()) {
+		return forwarded->originalSender;
+	}
+	return displayFrom();
+}
+
+uint8 HistoryItem::contentColorIndex() const {
+	if (const auto forwarded = Get<HistoryMessageForwarded>()) {
+		return forwarded->originalSender
+			? forwarded->originalSender->colorIndex()
+			: forwarded->originalHiddenSenderInfo->colorIndex;
+	}
+	return colorIndex();
+}
+
 std::unique_ptr<HistoryView::Element> HistoryItem::createView(
 		not_null<HistoryView::ElementDelegate*> delegate,
 		HistoryView::Element *replacing) {

Telegram/SourceFiles/history/history_item.h

@@ -516,6 +516,11 @@ public:
 	[[nodiscard]] PeerData *displayFrom() const;
 	[[nodiscard]] uint8 colorIndex() const;
 
+	// In forwards we show name in sender's color, but the message
+	// content uses the color of the original sender.
+	[[nodiscard]] PeerData *contentColorsFrom() const;
+	[[nodiscard]] uint8 contentColorIndex() const;
+
 	[[nodiscard]] std::unique_ptr<HistoryView::Element> createView(
 		not_null<HistoryView::ElementDelegate*> delegate,
 		HistoryView::Element *replacing = nullptr);

Telegram/SourceFiles/history/view/history_view_element.cpp

@@ -490,6 +490,10 @@ uint8 Element::colorIndex() const {
 	return data()->colorIndex();
 }
 
+uint8 Element::contentColorIndex() const {
+	return data()->contentColorIndex();
+}
+
 QDateTime Element::dateTime() const {
 	return _dateTime;
 }

Telegram/SourceFiles/history/view/history_view_element.h

@@ -317,6 +317,7 @@ public:
 	void refreshDataId();
 
 	[[nodiscard]] uint8 colorIndex() const;
+	[[nodiscard]] uint8 contentColorIndex() const;
 	[[nodiscard]] QDateTime dateTime() const;
 
 	[[nodiscard]] int y() const;

Telegram/SourceFiles/history/view/history_view_message.cpp

@@ -1670,7 +1670,7 @@ void Message::paintText(
 		.availableWidth = trect.width(),
 		.palette = &stm->textPalette,
 		.pre = stm->preCache.get(),
-		.blockquote = context.quoteCache(colorIndex()),
+		.blockquote = context.quoteCache(contentColorIndex()),
 		.colors = context.st->highlightColors(),
 		.spoiler = Ui::Text::DefaultSpoilerCache(),
 		.now = context.now,

Telegram/SourceFiles/history/view/history_view_reply.cpp

@@ -201,7 +201,7 @@ void Reply::update(
 		}
 	}
 	_colorPeer = message
-		? message->displayFrom()
+		? message->contentColorsFrom()
 		: story
 		? story->peer().get()
 		: _externalSender

Telegram/SourceFiles/history/view/media/history_view_document.cpp

@@ -888,7 +888,7 @@ void Document::draw(
 			.availableWidth = captionw,
 			.palette = &stm->textPalette,
 			.pre = stm->preCache.get(),
-			.blockquote = context.quoteCache(parent()->colorIndex()),
+			.blockquote = context.quoteCache(parent()->contentColorIndex()),
 			.colors = context.st->highlightColors(),
 			.spoiler = Ui::Text::DefaultSpoilerCache(),
 			.now = context.now,

Telegram/SourceFiles/history/view/media/history_view_extended_preview.cpp

@@ -237,7 +237,7 @@ void ExtendedPreview::draw(Painter &p, const PaintContext &context) const {
 			.availableWidth = captionw,
 			.palette = &stm->textPalette,
 			.pre = stm->preCache.get(),
-			.blockquote = context.quoteCache(parent()->colorIndex()),
+			.blockquote = context.quoteCache(parent()->contentColorIndex()),
 			.colors = context.st->highlightColors(),
 			.spoiler = Ui::Text::DefaultSpoilerCache(),
 			.now = context.now,

Telegram/SourceFiles/history/view/media/history_view_game.cpp

@@ -219,7 +219,7 @@ void Game::draw(Painter &p, const PaintContext &context) const {
 	auto tshift = inner.top();
 	auto paintw = inner.width();
 
-	const auto colorIndex = parent()->colorIndex();
+	const auto colorIndex = parent()->contentColorIndex();
 	const auto selected = context.selected();
 	const auto cache = context.outbg
 		? stm->replyCache[st->colorPatternIndex(colorIndex)].get()

Telegram/SourceFiles/history/view/media/history_view_gif.cpp

@@ -724,7 +724,7 @@ void Gif::draw(Painter &p, const PaintContext &context) const {
 			.availableWidth = captionw,
 			.palette = &stm->textPalette,
 			.pre = stm->preCache.get(),
-			.blockquote = context.quoteCache(parent()->colorIndex()),
+			.blockquote = context.quoteCache(parent()->contentColorIndex()),
 			.colors = context.st->highlightColors(),
 			.spoiler = Ui::Text::DefaultSpoilerCache(),
 			.now = context.now,

Telegram/SourceFiles/history/view/media/history_view_media_grouped.cpp

@@ -405,7 +405,7 @@ void GroupedMedia::draw(Painter &p, const PaintContext &context) const {
 			.availableWidth = captionw,
 			.palette = &stm->textPalette,
 			.pre = stm->preCache.get(),
-			.blockquote = context.quoteCache(parent()->colorIndex()),
+			.blockquote = context.quoteCache(parent()->contentColorIndex()),
 			.colors = context.st->highlightColors(),
 			.spoiler = Ui::Text::DefaultSpoilerCache(),
 			.now = context.now,

Telegram/SourceFiles/history/view/media/history_view_photo.cpp

@@ -433,7 +433,7 @@ void Photo::draw(Painter &p, const PaintContext &context) const {
 			.availableWidth = captionw,
 			.palette = &stm->textPalette,
 			.pre = stm->preCache.get(),
-			.blockquote = context.quoteCache(parent()->colorIndex()),
+			.blockquote = context.quoteCache(parent()->contentColorIndex()),
 			.colors = context.st->highlightColors(),
 			.spoiler = Ui::Text::DefaultSpoilerCache(),
 			.now = context.now,

Telegram/SourceFiles/history/view/media/history_view_web_page.cpp

@@ -584,11 +584,11 @@ void WebPage::draw(Painter &p, const PaintContext &context) const {
 
 	const auto selected = context.selected();
 	const auto view = parent();
-	const auto colorIndex = view->colorIndex();
+	const auto from = view->data()->contentColorsFrom();
+	const auto colorIndex = from ? from->colorIndex() : view->colorIndex();
 	const auto cache = context.outbg
 		? stm->replyCache[st->colorPatternIndex(colorIndex)].get()
 		: st->coloredReplyCache(selected, colorIndex).get();
-	const auto from = view->data()->displayFrom();
 	const auto backgroundEmojiId = from
 		? from->backgroundEmojiId()
 		: DocumentId();