---
sourceDocument: Brazil IT Service Management
sourceDocumentLink: https://www.servicenow.com/docs/r/it-service-management

 Release :

    - brazil

ft:locale :

    - en-US

ft:publication_title :

    - Brazil IT Service Management

ft:clusterId :

    - itsm

bundleId :

    - itsm

workflow :

    - Technology


---

# Style rules definition

# Style rules definition {#ariaid-title1}

Release version: Brazil  
Updated September 10, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
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://www.servicenow.com/docs/kCrw3NEA_wGn9YxO2qd03g)**   
  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://www.servicenow.com/docs/KptN332a~Lm4KIYXPjV0MQ)**   
  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://www.servicenow.com/docs/IIIBYEI8JFKQjUwnaKpEiA)**   
  Create style rules from the change schedules view to apply them to the specific change schedule where they're defined.

**Related concepts**   

* [Change schedules view](https://www.servicenow.com/docs/KL24YD~iGoZ8ue5ZzFsxaQ "The Change Schedules module provides a Gantt or timeline view of change requests based on criteria defined within a Change Schedule Definition.")  
**Related tasks**   

* [Create a change schedule from the Change Schedules page](https://www.servicenow.com/docs/4w7FRfRvq0MzeWkEfFx2Mw "You can create a change schedule to view all scheduled changes, change tasks, blackout periods, and maintenance windows for any given date, week, month, or year.")
* [Create a change schedule from the change schedule definition](https://www.servicenow.com/docs/pPwCy~d3~zWiR3b8Ebn1Aw "You can define a change schedule from a change schedule definition record. Change schedule definitions help you to define the content that displays in the change summary popover, the users, groups, or roles to share a schedule with, and related span style colors.")
* [Add related tasks to a change schedule](https://www.servicenow.com/docs/OJpCeKBiynHluQ52jAGu3Q "Create related definitions to present related tasks for change requests in the change schedule. For example, define a related definition to view the change tasks associated with a change request.")