Update README.md

yeah I'm bad at readmes

README.md

@@ -52,12 +52,12 @@ Requirements
 
 Running i3lock
 --------------
-Simply invoke the 'i3lock' command. To get out of it, enter your password and
+Simply invoke the 'i3lock-color' command. To get out of it, enter your password and
 press enter.
 
 Example usage for colors:
 
-i3lock --insidevercolor=0000a0bf --insidewrongcolor=ff8000bf --insidecolor=ffffffbf --ringvercolor=0020ffff --ringwrongcolor=4040ffff --ringcolor=404090ff --textcolor=ffffffff  --separatorcolor=aaaaaaff --keyhlcolor=30ccccff --bshlcolor=ff8000ff -r
+i3lock-color --insidevercolor=0000a0bf --insidewrongcolor=ff8000bf --insidecolor=ffffffbf --ringvercolor=0020ffff --ringwrongcolor=4040ffff --ringcolor=404090ff --textcolor=ffffffff  --separatorcolor=aaaaaaff --keyhlcolor=30ccccff --bshlcolor=ff8000ff -r
 
 
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