:root {
    /* Domain specific variables. */
    --color-serviceinstruction: #FFE0E0;
    --color-technologyinteraction: #C9E7B7;
    --color-endpoint: #F5D330;
    --color-proceduralinstruction: #FFE0E0;
    --color-informationexchangerequirement: #FFFFB5;
    --color-organization: #FFFFB5;
    --color-role: #FFFFB5;
    --color-requirement: #CCCCFF;
}