color: add page

pages/windows/color.md

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+# color
+
+> Set the console foreground and background colors.
+
+- Set the console colors to the default values:
+
+`color`
+
+- Set the console foreground and background to a specific color:
+
+`color {{color_hex}}`
+
+- List available color values and detailed information:
+
+`color /?`