From bf7b70c456fc6ea431d8a2cca02a6b7cdb25dfc4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rodrigo=20Gir=C3=A3o=20Serr=C3=A3o?=
 <5621605+rodrigogiraoserrao@users.noreply.github.com>
Date: Fri, 15 Dec 2023 10:24:33 +0000
Subject: [PATCH] Add note about . (#3873)

---
 docs/guide/design.md | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/docs/guide/design.md b/docs/guide/design.md
index 46b8d4d04d..0fbd74a21e 100644
--- a/docs/guide/design.md
+++ b/docs/guide/design.md
@@ -93,10 +93,13 @@ textual colors
 
 Here's a list of the colors defined in the default light and dark themes.
 
+!!! note
+
+    `$boost` will look different on different backgrounds because of its alpha channel.
+
 ```{.rich title="Textual Theme Colors"}
 from rich import print
 from textual.app import DEFAULT_COLORS
 from textual.design import show_design
 output = show_design(DEFAULT_COLORS["light"], DEFAULT_COLORS["dark"])
 ```
-