Color
Here is a color palette based on the material design base colors. Each of these colors is defined with a base color class and an optional lighten or darken class.
Background Color
To apply a background color, just add the color name and light/darkness as a class to the element.
This is a card panel with a light-blue lighten-2
                class
            Text Color
To apply a text color, just append -text to the color class like
                this:
                This is a card panel with dark blue text
              
            Gradient Color Palette
gradient-45deg-amber-amber
              gradient-45deg-blue-indigo
              gradient-45deg-indigo-light-blue
              
                gradient-45deg-red-pink
              
                gradient-45deg-light-blue-teal
              
                gradient-45deg-light-blue-indigo
              
              
                gradient-45deg-yellow-green
              
                gradient-45deg-orange-deep-orange
              
              
                gradient-45deg-deep-purple-purple
              
              
                gradient-45deg-light-green-amber
              
              
                gradient-45deg-purple-pink
            gradient-45deg-indigo-blue
              gradient-45deg-brown-brown
              gradient-45deg-blue-grey-blue
              gradient-45deg-purple-deep-orange
              gradient-45deg-green-teal
              gradient-45deg-indigo-light-blue
              
                gradient-45deg-teal-cyan
              
                gradient-45deg-blue-grey-blue-grey
              
              
                gradient-45deg-cyan-light-green
              
                gradient-45deg-orange-amber
            gradient-45deg-indigo-purple
              gradient-45deg-deep-purple-blue
              gradient-45deg-deep-orange-orange
              gradient-45deg-light-blue-cyan
              gradient-45deg-purple-amber
              gradient-45deg-purple-deep-purple
              gradient-45deg-purple-light-blue
              
                gradient-45deg-cyan-cyan
              
                gradient-45deg-yellow-teal
              
                gradient-45deg-cyan-light-green
            Color Palette
#ffebee red lighten-5
                #ffcdd2 red lighten-4
                #ef9a9a red lighten-3
                #e57373 red lighten-2
                #ef5350 red lighten-1
                #f44336 red
                #e53935 red darken-1
                #d32f2f red darken-2
                #c62828 red darken-3
                #b71c1c red darken-4
                #ff8a80 red accent-1
                #ff5252 red accent-2
                #ff1744 red accent-3
                #d50000 red accent-4
              #fce4ec pink lighten-5
                #f8bbd0 pink lighten-4
                #f48fb1 pink lighten-3
                #f06292 pink lighten-2
                #ec407a pink lighten-1
                #e91e63 pink
                #d81b60 pink darken-1
                #c2185b pink darken-2
                #ad1457 pink darken-3
                #880e4f pink darken-4
                #ff80ab pink accent-1
                #ff4081 pink accent-2
                #f50057 pink accent-3
                #c51162 pink accent-4
              #f3e5f5 purple lighten-5
                #e1bee7 purple lighten-4
                #ce93d8 purple lighten-3
                #ba68c8 purple lighten-2
                #ab47bc purple lighten-1
                #9c27b0 purple
                #8e24aa purple darken-1
                #7b1fa2 purple darken-2
                #6a1b9a purple darken-3
                #4a148c purple darken-4
                #ea80fc purple accent-1
                #e040fb purple accent-2
                #d500f9 purple accent-3
                #aa00ff purple accent-4
              #ede7f6 deep-purple lighten-5
                #d1c4e9 deep-purple lighten-4
                #b39ddb deep-purple lighten-3
                #9575cd deep-purple lighten-2
                #7e57c2 deep-purple lighten-1
                #673ab7 deep-purple
                #5e35b1 deep-purple
                  darken-1
                #512da8 deep-purple
                  darken-2
                #4527a0 deep-purple
                  darken-3
                #311b92 deep-purple
                  darken-4
                #b388ff deep-purple accent-1
                #7c4dff deep-purple accent-2
                #651fff deep-purple accent-3
                #6200ea deep-purple accent-4
              #e8eaf6 indigo lighten-5
                #c5cae9 indigo lighten-4
                #9fa8da indigo lighten-3
                #7986cb indigo lighten-2
                #5c6bc0 indigo lighten-1
                #3f51b5 indigo
                #3949ab indigo darken-1
                #303f9f indigo darken-2
                #283593 indigo darken-3
                #1a237e indigo darken-4
                #8c9eff indigo accent-1
                #536dfe indigo accent-2
                #3d5afe indigo accent-3
                #304ffe indigo accent-4
              #e3f2fd blue lighten-5
                #bbdefb blue lighten-4
                #90caf9 blue lighten-3
                #64b5f6 blue lighten-2
                #42a5f5 blue lighten-1
                #2196f3 blue
                #1e88e5 blue darken-1
                #1976d2 blue darken-2
                #1565c0 blue darken-3
                #0d47a1 blue darken-4
                #82b1ff blue accent-1
                #448aff blue accent-2
                #2979ff blue accent-3
                #2962ff blue accent-4
              #e1f5fe light-blue lighten-5
                #b3e5fc light-blue lighten-4
                #81d4fa light-blue lighten-3
                #4fc3f7 light-blue lighten-2
                #29b6f6 light-blue lighten-1
                #03a9f4 light-blue
                #039be5 light-blue
                  darken-1
                #0288d1 light-blue
                  darken-2
                #0277bd light-blue
                  darken-3
                #01579b light-blue
                  darken-4
                #80d8ff light-blue accent-1
                #40c4ff light-blue accent-2
                #00b0ff light-blue accent-3
                #0091ea light-blue accent-4
              #e0f7fa cyan lighten-5
                #b2ebf2 cyan lighten-4
                #80deea cyan lighten-3
                #4dd0e1 cyan lighten-2
                #26c6da cyan lighten-1
                #00bcd4 cyan
                #00acc1 cyan darken-1
                #0097a7 cyan darken-2
                #00838f cyan darken-3
                #006064 cyan darken-4
                #84ffff cyan accent-1
                #18ffff cyan accent-2
                #00e5ff cyan accent-3
                #00b8d4 cyan accent-4
              #e0f2f1 teal lighten-5
                #b2dfdb teal lighten-4
                #80cbc4 teal lighten-3
                #4db6ac teal lighten-2
                #26a69a teal lighten-1
                #009688 teal
                #00897b teal darken-1
                #00796b teal darken-2
                #00695c teal darken-3
                #004d40 teal darken-4
                #a7ffeb teal accent-1
                #64ffda teal accent-2
                #1de9b6 teal accent-3
                #00bfa5 teal accent-4
              #e8f5e9 green lighten-5
                #c8e6c9 green lighten-4
                #a5d6a7 green lighten-3
                #81c784 green lighten-2
                #66bb6a green lighten-1
                #4caf50 green
                #43a047 green darken-1
                #388e3c green darken-2
                #2e7d32 green darken-3
                #1b5e20 green darken-4
                #b9f6ca green accent-1
                #69f0ae green accent-2
                #00e676 green accent-3
                #00c853 green accent-4
              #f1f8e9 light-green lighten-5
                #dcedc8 light-green lighten-4
                #c5e1a5 light-green lighten-3
                #aed581 light-green lighten-2
                #9ccc65 light-green lighten-1
                #8bc34a light-green
                #7cb342 light-green
                  darken-1
                #689f38 light-green
                  darken-2
                #558b2f light-green
                  darken-3
                #33691e light-green
                  darken-4
                #ccff90 light-green accent-1
                #b2ff59 light-green accent-2
                #76ff03 light-green accent-3
                #64dd17 light-green accent-4
              #f9fbe7 lime lighten-5
                #f0f4c3 lime lighten-4
                #e6ee9c lime lighten-3
                #dce775 lime lighten-2
                #d4e157 lime lighten-1
                #cddc39 lime
                #c0ca33 lime darken-1
                #afb42b lime darken-2
                #9e9d24 lime darken-3
                #827717 lime darken-4
                #f4ff81 lime accent-1
                #eeff41 lime accent-2
                #c6ff00 lime accent-3
                #aeea00 lime accent-4
              #fffde7 yellow lighten-5
                #fff9c4 yellow lighten-4
                #fff59d yellow lighten-3
                #fff176 yellow lighten-2
                #ffee58 yellow lighten-1
                #ffeb3b yellow
                #fdd835 yellow darken-1
                #fbc02d yellow darken-2
                #f9a825 yellow darken-3
                #f57f17 yellow darken-4
                #ffff8d yellow accent-1
                #ffff00 yellow accent-2
                #ffea00 yellow accent-3
                #ffd600 yellow accent-4
              #fff8e1 amber lighten-5
                #ffecb3 amber lighten-4
                #ffe082 amber lighten-3
                #ffd54f amber lighten-2
                #ffca28 amber lighten-1
                #ffc107 amber
                #ffb300 amber darken-1
                #ffa000 amber darken-2
                #ff8f00 amber darken-3
                #ff6f00 amber darken-4
                #ffe57f amber accent-1
                #ffd740 amber accent-2
                #ffc400 amber accent-3
                #ffab00 amber accent-4
              #fff3e0 orange lighten-5
                #ffe0b2 orange lighten-4
                #ffcc80 orange lighten-3
                #ffb74d orange lighten-2
                #ffa726 orange lighten-1
                #ff9800 orange
                #fb8c00 orange darken-1
                #f57c00 orange darken-2
                #ef6c00 orange darken-3
                #e65100 orange darken-4
                #ffd180 orange accent-1
                #ffab40 orange accent-2
                #ff9100 orange accent-3
                #ff6d00 orange accent-4
              #fbe9e7 deep-orange lighten-5
                #ffccbc deep-orange lighten-4
                #ffab91 deep-orange lighten-3
                #ff8a65 deep-orange lighten-2
                #ff7043 deep-orange lighten-1
                #ff5722 deep-orange
                #f4511e deep-orange
                  darken-1
                #e64a19 deep-orange
                  darken-2
                #d84315 deep-orange
                  darken-3
                #bf360c deep-orange
                  darken-4
                #ff9e80 deep-orange accent-1
                #ff6e40 deep-orange accent-2
                #ff3d00 deep-orange accent-3
                #dd2c00 deep-orange accent-4
              #efebe9 brown lighten-5
                #d7ccc8 brown lighten-4
                #bcaaa4 brown lighten-3
                #a1887f brown lighten-2
                #8d6e63 brown lighten-1
                #795548 brown
                #6d4c41 brown darken-1
                #5d4037 brown darken-2
                #4e342e brown darken-3
                #3e2723 brown darken-4
              #fafafa grey lighten-5
                #f5f5f5 grey lighten-4
                #eeeeee grey lighten-3
                #e0e0e0 grey lighten-2
                #bdbdbd grey lighten-1
                #9e9e9e grey
                #757575 grey darken-1
                #616161 grey darken-2
                #424242 grey darken-3
                #212121 grey darken-4