Background Colours:

red  ; <div style="background-color: red;">
maroon  ; <div style="background-color: maroon;">
burnt orange ; <div style="background-color: burntorange;">
orange ; <div style="background-color: orange;">
yellow ; <div style="background-color: yellow;">
dark green ; <div style="background-color: darkgreen;">
lime green ; <div style="background-color: limegreen;">
teal ; <div style="background-color: teal;">
blue ; <div style="background-color: blue;">
light blue ; <div style="background-color: lightblue;">
violet ; <div style="background-color: violet;">
purple ; <div style="background-color: purple;"
pink ; <div style="background-color: pink;">
hot pink ; <div style="background-color: hot pink;">
black ; <div style="background-color: black;">
grey ; <div style="background-color: grey;">
faded grey ; <div style="background-color: fadedgrey;">
Black ; <div style="background-color: black;">
Red ; <div style="background-color: red;">
Orange ; <div style="background-color: orange;">
Yellow ; <div style="background-color: yellow;">
Light Blue ; <div style="background-color: lightblue;">
Pink ; <div style="background-color: pink;">
Hot Pink ; <div style="background-color: #ff0066;">
Coral Pink ; <div style="background-color: #ff3333;">
Orange ; <div style="background-color: #ff6600;">
Gold ; <div style="background-color: #ffcc00;">
Lime Green ; <div style="background-color: limegreen;">
Bright Green ; <div style="background-color:#00ff00;">
Cyan ; <div style="background-color: cyan;">
Sky Blue ; <div style="background-color: #0099ff;">
Turquoise ; <div style="background-color:  #006666;">
Lavender ; <div style="background-color: #333ccc;">
Purple ; <div style="background-color: #9900ff;">
Dark Purple ; <div style="background-color: #330066;">

Credit to carlynicole97.
Changing the numbers will create new colours!