[PATCH] perf/tui: Change default selection background color to yellow

[Ingo Molnar <mingo@kernel.org>]

Boris reported that 'perf top' is unusable on his default 'black on 
white' terminal, which uses (eye friendly) light-grey as a background 
color.

The reason is that the TUI cursor for the current selection line uses 
HE_COLORSET_SELECTED, and that has a default background color of 
'lightgrey' - which is a common terminal background choice and thus 
the colors conflict.

Use yellow as the background color instead: that should be an uncommon 
terminal background, yet it's still ergonomic on both black and 
white/grey terminals.

[ It would be a better solution to straight out detect color
  collisions and resolve them reasonably by converting them to RGB and
  calculating color space distances, but I was unable to find
  proper documentation for SLtt_get_color_object() to recover the
  current color scheme so I gave up ... Yellow works well enough. ]

Reported-by: Borislav Petkov <bp@alien8.de>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: David Binderman <dcb314@hotmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 tools/perf/ui/browser.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/ui/browser.c b/tools/perf/ui/browser.c
index 6680fa5cb9dd..688acb94c01f 100644
--- a/tools/perf/ui/browser.c
+++ b/tools/perf/ui/browser.c
@@ -499,7 +499,7 @@ static struct ui_browser_colorset {
 		.colorset = HE_COLORSET_SELECTED,
 		.name	  = "selected",
 		.fg	  = "black",
-		.bg	  = "lightgray",
+		.bg	  = "yellow",
 	},
 	{
 		.colorset = HE_COLORSET_CODE,