diff --git a/.github/actions/spell-check/patterns/patterns.txt b/.github/actions/spell-check/patterns/patterns.txt
index 0a2ee40b76..6f8607216b 100644
--- a/.github/actions/spell-check/patterns/patterns.txt
+++ b/.github/actions/spell-check/patterns/patterns.txt
@@ -1,6 +1,6 @@
 https://(?:(?:[-a-zA-Z0-9?&=]*\.|)microsoft\.com)/[-a-zA-Z0-9?&=_\/.]*
 https://aka\.ms/[-a-zA-Z0-9?&=\/_]*
-http://www.w3.org/[-a-zA-Z0-9?&=\/_]*
+https://www.w3.org/[-a-zA-Z0-9?&=\/_#]*
 https://(?:(?:www\.|)youtube\.com|youtu.be)/[-a-zA-Z0-9?&=]*
 (?:0[Xx]|U\+|#)[a-f0-9A-FGgRr]{2,}[Uu]?[Ll]?\b
 \{[0-9A-FA-F]{8}-(?:[0-9A-FA-F]{4}-){3}[0-9A-FA-F]{12}\}
diff --git a/.github/actions/spell-check/whitelist/web.txt b/.github/actions/spell-check/whitelist/web.txt
index ce07ecac17..7ec457b694 100644
--- a/.github/actions/spell-check/whitelist/web.txt
+++ b/.github/actions/spell-check/whitelist/web.txt
@@ -3,3 +3,4 @@ td
 www
 ecma
 rapidtables
+WCAG
diff --git a/src/cascadia/TerminalApp/ColorHelper.cpp b/src/cascadia/TerminalApp/ColorHelper.cpp
index 9917b2d676..1e8d061a3c 100644
--- a/src/cascadia/TerminalApp/ColorHelper.cpp
+++ b/src/cascadia/TerminalApp/ColorHelper.cpp
@@ -13,7 +13,7 @@ using namespace winrt::TerminalApp;
 // - true of light, false if dark
 bool ColorHelper::IsBrightColor(const winrt::Windows::UI::Color& color)
 {
-    // http://www.w3.org/TR/AERT#color-contrast
+    // https://www.w3.org/TR/AERT#color-contrast
     auto brightness = (color.R * 299 + color.G * 587 + color.B * 114) / 1000.f;
     return brightness > 128.f;
 }
@@ -159,7 +159,7 @@ winrt::Windows::UI::Color ColorHelper::Darken(const winrt::Windows::UI::Color& c
 // Method Description:
 // Gets an accent color to a given color. Basically, generates
 // 16 shades of the color and finds the first which has a good
-// contrast according to http://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef (WCAG Version 2)
+// contrast according to https://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef (WCAG Version 2)
 // Readability ratio of 3.5 seems to look quite nicely
 // Arguments:
 // - color: the color for which we need an accent
@@ -198,7 +198,7 @@ winrt::Windows::UI::Color ColorHelper::GetAccentColor(const winrt::Windows::UI::
 
 // Method Description:
 // Gets the readability of two colors according to
-// http://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef (WCAG Version 2)
+// https://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef (WCAG Version 2)
 // Arguments:
 // - firstColor: the first color for the readability check (hsl)
 // - secondColor: the second color for the readability check (hsl)
@@ -211,7 +211,7 @@ float ColorHelper::GetReadability(const HSL& first, const HSL& second)
 
 // Method Description:
 // Gets the readability of two colors according to
-// http://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef (WCAG Version 2)
+// https://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef (WCAG Version 2)
 // Arguments:
 // - firstColor: the first color for the readability check (rgb)
 // - secondColor: the second color for the readability check (rgb)
@@ -227,7 +227,7 @@ float ColorHelper::GetReadability(const winrt::Windows::UI::Color& first, const
 
 // Method Description:
 // Calculates the luminance of a given color according to
-// http://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef
+// https://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef
 // Arguments:
 // - color: its luminance is going to be calculated
 // Return Value: