Changes in version 0.0.0.9004                      

  - Corrected regex for hex values (thanks to @EllaKaye).
  - Vectorised cr_choose_bw() (#12) and gave README example of vector
    input.
  - Change 'colour' to 'color' throughout.

                     Changes in version 0.0.0.9003                      

  - Added cr_view_contrast() function (#2).
  - Added tests.
  - Added Codecov badge and GitHub Action for coverage.
  - Added CodeFactor badge.

                     Changes in version 0.0.0.9002                      

  - Added cr_choose_color() function.

                     Changes in version 0.0.0.9001                      

  - Added cr_choose_bw() function (#1).
  - Updated naming convention to cr_*() (#9).
  - Updated 'color' throughout (#11).
  - Added cr_choose_bw() to README.
  - Added code of conduct.
  - Add basic stopifnots.

                     Changes in version 0.0.0.9000                      

  - Added get_ratio() function.
  - Added NEWS, LICENSE, README.