KML should draw a red polyline or blue polyline? - google-maps-api-3

Question

Please tell me which one is "correct behavior as KML file format".
As you may know, the <color> tag of KML contains the color information with the order AABBGGRR. This is defined in the OGC KML document.
16.9 kml:colorType
The order of expression is aabbggrr, where aa=alpha (00 to ff); bb=blue (00 to ff); gg=green (00 to ff); rr=red (00 to ff).
http://docs.opengeospatial.org/is/12-007r2/12-007r2.html
So, the <color>7f0000ff</color> should be red color.
Example1:
With this KML file, Google Earth and Google Maps API (KmlLayer) draw a red polyline correctly.
<?xml version="1.0" encoding="utf-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document>
<Style id="globalStyles">
<LineStyle id="line">
<color>7f0000ff</color>
<width>4</width>
</LineStyle>
</Style>
<Placemark>
<styleUrl>#globalStyles</styleUrl>
<LineString>
<tessellate>1</tessellate>
<coordinates>-14.405821,-7.963539 -14.381448,-7.975707</coordinates>
</LineString>
</Placemark>
</Document>
</kml>
https://jsfiddle.net/wf9a5m75/xnw0hvvf/6/
Example2:
However, with this KML file, the Google Maps API draws a blue line, but Google Earth draws still a red polyline.
<?xml version="1.0" encoding="utf-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document>
<Style id="globalStyles">
<LineStyle id="line">
<color>7f0000ff</color>
<width>4</width>
</LineStyle>
</Style>
<Placemark>
<name>runway</name>
<styleUrl>#globalStyles</styleUrl>
<Style>
<LineStyle>
<!--
Coloring is implicitly merged from the global style, width is
explicitly overridden.
-->
<width>10</width>
</LineStyle>
</Style>
<LineString>
<tessellate>1</tessellate>
<coordinates>-14.405821,-7.963539 -14.381448,-7.975707</coordinates>
</LineString>
</Placemark>
</Document>
</kml>
https://jsfiddle.net/wf9a5m75/xnw0hvvf/5/
Answer from Google
I believe this is a bug of Google Maps JS API v3, and I reported this to Google.
But Google says
Status: Won't Fix (Intended Behavior)
Yes. I believe Google Maps Javascript API follows the "hexadecimal" 1 format for colors. What I would recommend is, if possible, to adjust your color settings to follow the hexadecimal format of Google Maps Javascript API.
https://issuetracker.google.com/issues/71991422#comment2
Wow, does they really intend this?
In real situation problem
Losing a color information means losing the meaning of the polyline/polygon.
For example, the National Oceanic and atmospheric administration (NOAA) of United states provides realtime weather hazard using KMZ file.
https://www.weather.gov/source/crh/shapefiles/
Google Earth draws polygons with correct colors (at least I think so), but the KmlLayer of Google Maps API v3 draws all blue polygons.
Changing colors means changing meaning of the polygons.
Don't you think this is serious problem?
So, in order to ask to fix the problem of Google Maps JS API v3, I need to know which one (red or blue) is correct.
Please tell me your answer with valid information.

Answer 1

For the offical interpretation of KML refer directly to the Open Geospatial Consortium (OGC) KML 2.2 standard. Note KML 2.3 is published but not yet implemented in Google Earth or Google Maps. There has a been issue with respect to the visibility tag where Google Earth implements a behavior contrary to the KML spec but fixing would break existing code so it won't be "fixed". In cases of contradition, the official OGC KML Standard supersedes any vendor documentation or implementation.
KML 2.2 (Document # 07-147r2) states in section 16.8.1 the following:
The order of expression is aabbggrr, where aa=alpha (00 to ff);
bb=blue (00 to ff); gg=green (00 to ff); rr=red (00 to ff)
It also gives an example in 16.7.1 showing that a value of ff0000ff is for red where the last 2-characters (ff) represent the red component.
This means that Google Earth is correctly displaying the KML rendering features using <color>7f0000ff</color> with a red color. Google Maps API is not rendering it correctly and is a bug.
Reference:
KML Standard: http://www.opengeospatial.org/standards/kml#downloads