Colour | Colour name | Hex code | SCSS variable | Notes |
| System-black | #1A1A1A | $ontario-colour-black | Default colour for most text (such as body, headings, subheadings) |
| System-white | #FFFFFF | $ontario-colour-white | Text on primary buttons, dark backgrounds |
| Alert | #CD0000 | $ontario-colour-alert | Alert-level icons, left-hand vertical bar of alert box or error box |
| Alert light | #FCEFF0 | $ontario-colour-alert-light | Background of alert box |
| Success | #118847 | $ontario-colour-success | Success-level icons, left-hand vertical bar of success box |
| Success light | #E5f0E9 | $ontario-colour-success-light | Background of success box |
| Warning | #FFD440 | $ontario-colour-warning | Warning-level icons, left-hand vertical bar of warning box |
| Warning light | #FEF6DC | $ontario-colour-warning-light | Background of warning box |
| Information | #1080A6 | $ontario-colour-information | Information-level icons, left-hand vertical bar of information box |
| Information light | #E2F0F4 | $ontario-colour-information-light | Background of information box |
| Link | #0066cc | $ontario-colour-link | Buttons and unvisited links |
| Link - hover | #00478F | $ontario-colour-link--hover | Button and link hover state |
| Link - active | #002142 | $ontario-colour-link--active | Button and link active state |
| Link - visited | #551A8B | $ontario-colour-link--visited | Link visited state (but not buttons – they remain blue) |
| Secondary - hover | #E0F0FF | $ontario-colour-secondary--hover | Secondary button hover state |
| Secondary - active | #C2E0FF | $ontario-colour-secondary--active | Secondary button active state |
| Tertiary - hover | #E8E8E8 | $ontario-colour-tertiary--hover | Tertiary button hover state |
| Tertiary - active | #D1D1D1 | $ontario-colour-tertiary--active | Tertiary button active state |
| Focus ring | #009ADB | $ontario-colour-focus | Focus state outline for inputs, links and buttons |