Add tips for HTML color picking

Tricks.md

@@ -2,6 +2,25 @@
     
     swaymsg -t get_outputs | jq -r '.[] | select(.focused) | (.current_mode.width | tostring) + "x" + (.current_mode.height | tostring)'
 
+# HTML color picker
+
+Bind this to a key, select a point on the screen and get a HTML color code for that point copied to the clipboard. Requires ImageMagick, `grim` and `slurp` to be installed.
+
+    grim -g "$(slurp -p)" -t ppm - | convert - -format '%[pixel:p{0,0}]' txt:- | tail -n 1 | cut -d ' ' -f 4 | wl-copy
+
+If you don't use a color picker frequently enough to reminder the keybinding, you can create a simple .desktop file for it in ~/.local/share/applications/ and then launch it searching for the name with a desktop file launcher like Rofi. Here's an example .desktop file:
+
+`Name=HTML Color Picker for Sway`
+`Comment=Copies to Clipboard`
+`Keywords=`
+`Exec=/home/yourusername/.local/bin/html-color-picker-for-sway`
+`Terminal=false`
+`Type=Application`
+`StartupNotify=true`
+
+Put the command above in `~/.local/bin/html-color-picker-for-sway` and add a shebang line as the first line: `#!/usr/bin/env bash`
+
+
 
 # Tamefox - suspend Firefox when loses focus
 ```