How can I customize the color of a Checkbox in material-ui

You need to use the iconStyle, but since the checkbox icon is an SVG image, you need to set the color using fill instead of color:

https://jsfiddle.net/27Lmaz48/1/

<Checkbox label='My checkbox' 
  labelStyle={{color: 'white'}}
  iconStyle={{fill: 'white'}}
/>

This is how you do it:

 <FormControlLabel  
                control={
                  <Checkbox
                    checked={cryon}
                    onChange={this.handleChange('cryon')}
                    style ={{
                      color: "#00e676",
                    }}
                    value="cryon"
                  />
                }
                label={<Typography variant="h6" style={{ color: '#2979ff' }}>Work</Typography>}
              />

It's an old question, but for those who are using material 1.2.

The iconStyle is not working for me.

However, I achieved this by overwriting the existing theme and wrap the 'Checkbox' component to a new one.

import { withStyles } from '@material-ui/core/styles';
import Checkbox from '@material-ui/core/Checkbox';



const checkBoxStyles = theme => ({
    root: {
      '&$checked': {
        color: '#3D70B2',
      },
    },
    checked: {},
   })

const CustomCheckbox = withStyles(checkBoxStyles)(Checkbox);

Now you can use the "CustomCheckbox" component in render function.

And when it's checked , the color should be the one you assigned.