BIOC attribute not working in XML

Hi,

I have added BIOC attribute in my XML to show the task in color in BPMN.io. But it is not working as expected only the diagram is rendered.

Is there any issue in the Below mentioned is the XML:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<bpmn:definitions xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bioc="http://www.omg.org/spec/BPMN/20100524/BIOC" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" xmlns:di="http://www.omg.org/spec/DD/20100524/DI" exporter="Camunda Modeler" exporterVersion="3.0.0-dev" id="Definitions_0xcv3nk" targetNamespace="http://bpmn.io/schema/bpmn">
<bpmn:process id="Process_0sckl64" isExecutable="true">
<bpmn:startEvent id="StartEvent_1">
<bpmn:outgoing>Flow_0mnravn</bpmn:outgoing>
</bpmn:startEvent>
<bpmn:sequenceFlow id="Flow_0mnravn" sourceRef="StartEvent_1" targetRef="Activity_1oen45z"/>
<bpmn:endEvent id="Event_0rz4uel">
<bpmn:incoming>Flow_0fe5961</bpmn:incoming>
</bpmn:endEvent>
<bpmn:task id="Activity_1oen45z" name="task1">
<bpmn:incoming>Flow_0mnravn</bpmn:incoming>
<bpmn:outgoing>Flow_0fe5961</bpmn:outgoing>
</bpmn:task>
<bpmn:sequenceFlow id="Flow_0fe5961" sourceRef="Activity_1oen45z" targetRef="Event_0rz4uel"/>
</bpmn:process>
<bpmndi:BPMNDiagram id="BPMNDiagram_1">
<bpmndi:BPMNPlane bpmnElement="Process_0sckl64" id="BPMNPlane_1">
<bpmndi:BPMNEdge bpmnElement="Flow_0fe5961" id="Flow_0fe5961_di">
<di:waypoint x="350" y="100"/>
<di:waypoint x="402" y="100"/>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="Flow_0mnravn" id="Flow_0mnravn_di">
<di:waypoint x="198" y="100"/>
<di:waypoint x="250" y="100"/>
</bpmndi:BPMNEdge>
<bpmndi:BPMNShape bpmnElement="StartEvent_1" id="_BPMNShape_StartEvent_2">
<dc:Bounds height="36" width="36" x="162" y="82"/>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="Event_0rz4uel" id="Event_0rz4uel_di">
<dc:Bounds height="36" width="36" x="402" y="82"/>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bioc:fill="rgb(200, 230, 201)" bioc:stroke="rgb(67, 160, 71)" bpmnElement="Activity_1oen45z" id="Activity_1oen45z_di">
<dc:Bounds height="80" width="100" x="250" y="60"/>
</bpmndi:BPMNShape>
</bpmndi:BPMNPlane>
</bpmndi:BPMNDiagram>
</bpmn:definitions>

The XML you posted is invalid due to several reasons (e.g. unclosed tags). I tried to fix it and resulted in this codesandbox.

Besides some parsing errors I discovered you used a wrong namespace for xmlns:bioc

xmlns:bioc=“http://www.omg.org/spec/BPMN/20100524/BIOC”

The correct one would be

xmlns:bioc=“http://bpmn.io/schema/bpmn/biocolor/1.0

Did you set it manually or why you ended up with this wrong namespace?