In RFC 7986 iCalendar Property Extensions October 2016 a new COLOR property was defined. Currently, the event color in "VEVENT" is nor used as background color of the event.
Although it is only a MAY, it would be nice to have the events displayed in their event color.
5.9. COLOR Property
Property Name: COLOR
Purpose: This property specifies a color used for displaying the
calendar, event, todo, or journal data.
Value Type: TEXT
Property Parameters: IANA and non-standard property parameters can
be specified on this property.
Conformance: This property can be specified once in an iCalendar
object or in "VEVENT", "VTODO", or "VJOURNAL" calendar components.
Description: This property specifies a color that clients MAY use
when presenting the relevant data to a user. Typically, this
would appear as the "background" color of events or tasks. The
value is a case-insensitive color name taken from the CSS3 set of
names, defined in Section 4.3 of [W3C.REC-css3-color-20110607].
Format Definition: This property is defined by the following
notation:
color = "COLOR" colorparam ":" text CRLF
; Value is CSS3 color name
colorparam = *(";" other-param)
Example: The following is an example of this property:
COLOR:turquoise
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