There are also hidden colors for text and drawing on your pictures. If you're on an iPhone, you'll notice that white and black are absent from the color palette (Android users have them built in). You can get the white crayon by touching the palette and dragging your finger toward the top-left corner. To get black, touch the palette and drag your finger toward the bottom of the screen. As you drag your finger up or down, note the range of colors you can unlock, like pink, as you move toward white or black.