Style rules definition
You can create a style span to specify the color for different events in a change schedule. Style spans in a schedule help to quickly identify characteristics of a change based on a field value from the Change Request.
Change Schedules includes several base styles to ensure every schedule has span styles to begin with. By default, Blackout Schedules are represented by a gray color, Maintenance schedules are represented by a light blue color and change requests are represented by either red (risk = High), orange (risk = moderate), or green (risk = low).
To define style rules, you must activate Change Management - Change Schedule plugin (com.snc.change_management.soc).
You can define styles in multiple ways, such as from the Default Style Rules, Change Schedule definitions, or from the Span Style window in the Change Schedule timeline.
Note: All style rule tables extend the Style Rule Core table [chg_soc_style_rule_core].
- Define default style rules
Define style rules from the Default Style Rules module to apply them to all change schedules rather than to a specific application. - Define style rules from Change Schedule Definitions
Define style rules from a change schedule definition to apply them to the change schedule that's related to the definition. - Define style rules from the change schedules view
Create style rules from the change schedules view to apply them to the specific change schedule where they're defined.
Parent Topic:Change schedules
Related topics
Create a change schedule from the Change Schedules page
Create a change schedule from the change schedule definition
--- title: Style rules definition description: You can create a style span to specify the color for different events in a change schedule. Style spans in a schedule help to quickly identify characteristics of a change based on a field value from the Change Request. locale: en-US canonical_url: https://www.servicenow.com/docs/r/australia/it-service-management/change-management/style-rules-definition.html release: australia product: Change Management classification: change-management topic_type: concept last_updated: "2026-09-10" reading_time_minutes: 2 breadcrumb: [Change schedules, Configure, Change Management, IT Service Management] --- # Style rules definition You can create a style span to specify the color for different events in a change schedule. Style spans in a schedule help to quickly identify characteristics of a change based on a field value from the Change Request. Change Schedules includes several base styles to ensure every schedule has span styles to begin with. By default, Blackout Schedules are represented by a gray color, Maintenance schedules are represented by a light blue color and change requests are represented by either red \(risk = High\), orange \(risk = moderate\), or green \(risk = low\). To define style rules, you must activate Change Management - Change Schedule plugin \(com.snc.change\_management.soc\). You can define styles in multiple ways, such as from the Default Style Rules, Change Schedule definitions, or from the Span Style window in the Change Schedule timeline. **Note:** All style rule tables extend the Style Rule Core table \[chg\_soc\_style\_rule\_core\]. - **[Define default style rules](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/it-service-management/change-management/def-stl-rules-from-stl-rules-table.md)** Define style rules from the Default Style Rules module to apply them to all change schedules rather than to a specific application. - **[Define style rules from Change Schedule Definitions](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/it-service-management/change-management/def-stl-rules-from-chng-sch-def.md)** Define style rules from a change schedule definition to apply them to the change schedule that's related to the definition. - **[Define style rules from the change schedules view](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/it-service-management/change-management/define-style-rules-from-view.md)** Create style rules from the change schedules view to apply them to the specific change schedule where they're defined. **Parent Topic:**[Change schedules](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/it-service-management/change-management/change-schedule.md) **Related topics** [Change schedules view]() [Create a change schedule from the Change Schedules page]() [Create a change schedule from the change schedule definition]() [Add related tasks to a change schedule]()
| title | Style rules definition |
| description | You can create a style span to specify the color for different events in a change schedule. Style spans in a schedule help to quickly identify characteristics of a change based on a field value from the Change Request. |
| locale | en-US |
| canonical_url | https://www.servicenow.com/docs/r/australia/it-service-management/change-management/style-rules-definition.html |
| release | australia |
| product | Change Management |
| classification | change-management |
| topic_type | concept |
| last_updated | 2026-09-10 |
| reading_time_minutes | 2 |
| breadcrumb | Change schedulesConfigureChange ManagementIT Service Management |