I have a mega menu that appears when I toggle the dropdown icon like so:

The dropdown item colors come from the _custom-skin.scss:

$skins: () !default;
$skins: map-merge((
  "Alderon": (
    "skin-primary-color":      #003767,
    "skin-navbar":             #003767,
    "skin-footer-color":       #003767,
    "skin-flat":               #ffffff,
    "skin-accent":             #003767,
    "skin-sidenav-item":       #ffffff,
    "skin-sidenav-item-hover": #ffffff,
    "skin-gradient-start":     #003767,
    "skin-gradient-end":       #ffffff,
    "skin-mask-slight":        #ffffff,
    "skin-mask-light":         #ffffff,
    "skin-mask-strong":        #ffffff,
    "skin-sn-child":           #003767,
    "skin-btn-primary":        #ffffff,
    "skin-btn-secondary":      #003767,
    "skin-btn-default":        #ffffff,
    "skin-text":               #ffffff,
  )
), $skins);

Except for this blue border color that appears when I click the dropdown item?

I can't find where this color is coming from so how do I remove it or change it?

Navbar Component:

<mdb-navbar class="Alderon-skin" SideClass="navbar navbar-2 navbar-expand-lg fixed-top">

  <!-- Navbar brand Mobile-->
  <mdb-navbar-brand class="d-block d-md-none d-lg-none">

    <a class="navbar-brand" [routerLink]="['home']">
      <img src="/assets/img/Logos/Alderon Logo_White.png" style="height:4rem;">
    </a>

  </mdb-navbar-brand>

  <!-- Navbar brand Medium -->
  <mdb-navbar-brand class="d-none d-md-block d-lg-none">

    <a class="navbar-brand" [routerLink]="['home']">
      <img src="/assets/img/Logos/Alderon Logo_White.png" style="height:3rem;">
    </a>

  </mdb-navbar-brand>

  <!-- Navbar brand Large-->
  <mdb-navbar-brand class="d-none d-md-none d-lg-block">

    <a class="navbar-brand" [routerLink]="['home']">
      <img src="/assets/img/Logos/Alderon Logo_White.png" style="height:40px;">
    </a>

  </mdb-navbar-brand>

  <mdb-navbar-brand class="d-block d-md-block d-lg-none">
    <!-- Search form -->
    <form class="form-inline waves-light" mdbWavesEffect>
      <div class="md-form my-3">
        <input class="form-control mr-sm-2" type="text" placeholder="Search">
      </div>
    </form>
  </mdb-navbar-brand>
  <!-- Collapsible content -->
  <links>

    <!-- Links -->
    <ul class="navbar-nav mr-auto custom-nav">
      <li class="nav-item">
        <a class="nav-link waves-light" mdbWavesEffect [routerLink]="['about']">About<span
          class="sr-only">(current)</span></a>
      </li>

      <li class="nav-item page-scroll">
        <a class="nav-link waves-light" mdbWavesEffect [routerLink]="['contact']">Contact</a>
      </li>
      <li class="nav-item">
        <a class="nav-link waves-light" mdbWavesEffect [routerLink]="['support']">Support</a>
      </li>
      <!--      <li class="nav-item">
              <a class="nav-link waves-light" mdbWavesEffect [routerLink]="['/', 'products']">Products</a>
            </li>-->
      <li class="dropdown mega-dropdown active row" mdbDropdown *ngIf="category">

        <a class="nav-link waves-light" mdbWavesEffect [routerLink]="['/', 'products']">Products</a>

        <a mdbDropdownToggle class="nav-link dropdown no-caret  d-none d-sm-none d-md-none d-lg-block"
           aria-haspopup="true"
           aria-expanded="false" style="font-size: small; margin-top: 3px; margin-left: -6px;">
          <mdb-icon fas icon="chevron-circle-down"></mdb-icon>
        </a>

        <div class="dropdown-menu mega-menu v-2 row z-depth-1 special-color">
          <div class="row mx-md-4 mx-1">
            <div *ngFor="let c of category.subcategories" class="col-md-8 col-xl-3 sub-menu my-xl-5 mt-5 mb-4">
      <li>
        <h6 class="sub-title white-text" [routerLink]="['/', 'products', c.slug]"> {{c.name}}</h6>
      </li>
      <ul>
        <li class="custom-nav" *ngFor="let subCat of c.subcategories">
          <a class="menu-item custom-nav pl-0" [routerLink]="['/', 'products', subCat.slug]">
            <mdb-icon fas icon="caret-right" class="pl-1 pr-3"></mdb-icon>
            {{subCat.name}}
          </a>


        </li>
      </ul>
      </div>
      </div>
      </div>
      </li>
    </ul>
    <!-- Links -->

    <!-- Search form -->
    <form class="form-inline waves-light d-none d-md-none d-lg-block" mdbWavesEffect>
      <div class="md-form my-3">
        <input class="form-control mr-sm-2" type="text" placeholder="Search">
      </div>
    </form>
  </links>
  <!-- Collapsible content -->

</mdb-navbar>

_custom-styles.scss:

html {
  font-family: "Open Sans", sans-serif;
  background: #454545;
}
h6:active{
  mask-border: none;
}

// Navbar CSS
.custom-nav{
  color: #ffffff;
  font-size: larger;
  font-family: Impact;

  a {
    color: white;
    font-family: Calibri;
    font-size: 17px;
  }

  li {
    margin-left: 20px;
    list-style: none;
  }

}

/* The subnavigation menu */
.subnav {
  float: left;
  overflow: hidden;
}

sub-title :hover{

  background-color: #003767;
}

.custom-nav :hover {
  /*  background-color: #002c52;*/
  border-radius: 3px;
  color: #37474f;
}

@media (min-width: 576px){
.form-inline .form-control {
  display: inline-block;
  width: 320px;
  vertical-align: middle;
}}

// Hamburger CSS
.navbar.navbar-2 .navbar-toggler-icon {
  background-image: url('https://mdbootstrap.com/img/svg/hamburger2.svg?color=fff');
}


// Family Carousel
.carousel-thumbnails .carousel-indicators
{
  height:  10%;
  margin-bottom: -30px;
  padding-bottom: 10px;
}

.carousel-img{
  border-width: 10px;
  margin-bottom: 20px;
  margin-top: 5px;
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
  min-width: fit-content;
  min-height: fit-content;
}

// Custom Tabs

.classic-tabs{
  background-color: #003767;
  color: #003767;
  li{
    a{
      color: black;
      &.active{
        color: #003767;
      }
    }
  }
}

// Support Desktop Tabs
.md-tabs{
  background-color: #003767;
}

// Home
.carousel-control-prev-icon{
  background-color: #003767;
  border-radius: 15px 15px 15px 15px;
}
.carousel-control-next-icon{
  background-color: #003767;
  border-radius: 15px 15px 15px 15px;
}

app.component.ts

import { Component, OnInit } from '@angular/core';
import {ProductCategoryService} from './services/product-category.service';
import {ActivatedRoute} from '@angular/router';
import {IProductCategory, IProductFamily} from './models/models';


@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent implements OnInit {

  public category: IProductCategory;
  public families: IProductFamily[];
  public isRootView: boolean = false;

  title = 'Alderon-Industries-Web';

  constructor(private prodCatSvc: ProductCategoryService, private route: ActivatedRoute) { }

  ngOnInit() {
    this.route.paramMap.subscribe(
      x => this.load(
        x.get("id")));
  }

  public load(slug: string) {
    if(slug) {

      this.prodCatSvc.getCategoryBySlug(slug, {include: "subcategories,subcategories.thumbnail,subcategories.families,subcategories.families.thumbnail,content,families,families.thumbnail"})
        .subscribe(cat => {
          this.category = cat;
          console.log(cat);
        });
    }
    else {
      this.isRootView = true;
      this.prodCatSvc.getCategories({IsRoot: true , include:"subcategories,subcategories.thumbnail,subcategories.families,subcategories.families.thumbnail,content,thumbnail,families,families.thumbnail"})
        .subscribe(cats => {
          this.category = {subcategories: cats.items};
          console.log(cats);
        });
    }
  }

}

models.ts

export interface INameValue {
  name: string;
  value: any;
}

export interface IContentItem {
  id: string;
  type: string;
  caption: string;
  tags: string[];
  path: string;
}

export interface IProductLine {
  id: string;
  name: string;
  slug: string;
  description: string;
  specs: INameValue[];
  imageIds: string;
  lineImage: IContentItem;
  lineImageId: string;
}

export interface IAbout {
  id: string;
  name: string;
  slug: string;
  type: string;
  tags: string[];
  path: string;
  caption: string;
  description: string;
}

export interface IDatabase {
  contentItems: IContentItem[];
  productLines: IProductLine[];
  product: IProduct[];
  contentAbout: IAbout[];
  category: IProductCategory[];
}

export interface IPumpCategory {
  id: string;
  all: string;
  name: string;
  slug: string;
  description: string;
  specs: INameValue[];
  imageIds: string;
  lineImage: IContentItem;
  lineImageId: string;
}

export interface IProductCategory {
  id?: string;
  isRoot?: string;
  slug?: string;
  name?: string;
  description?: string;
  subCategoryIds?: string[];
  contentIds?: string[];
  subcategories?: IProductCategory[];
  content?: IContentItem[];
  thumbnail?: IContentItem;
  families?: IProductFamily;
}

export interface IProductFamily {
  id?: string;
  slug?: string;
  name?: string;
  description: string;
  categoryIds: string[];
  contentIds: string[];
  content?: IContentItem[];
  thumbnail?: IContentItem;
  products?: IProduct;
  attributes?: INameValue[];
  families?: IProductFamily[];
  images: IContent[];
  documents: IContent[];
}

export interface IProduct {
  id: string;
  familyId: string;
  partNumber: string;
  description: string;
  price: string;
  contentIds: string[];
  thumbnail?: IContentItem;
  content?: IContentItem[];
}

export interface IContent {
  id: string;
  name: string;
  fileName: string;
  extension: string;
  uri: string;
  order: string;
  group: string;
}

export interface IPagedList<T> {
  items: T[];
  page: number;
  pageSize: number;
  hasNext: number;
  hasPrevious: number;
}

product-category.service.ts

import { Injectable } from '@angular/core';
import {HttpClient, HttpParams} from '@angular/common/http';
import {IBaseFilterDto} from '../models/IBaseFilterDto';
import {Observable} from 'rxjs';
import {IPagedList, IProductCategory} from '../models/models';

export interface FilterProductsCategoryDto extends IBaseFilterDto {
  search?: string;
  name?: string;
  IsRoot?: boolean;
}

export interface FilterProductCategoryDto {
  include: string;
}

@Injectable({
  providedIn: 'root'
})
export class ProductCategoryService {
  private baseUrl = 'http://localhost:51768/api';
  constructor(private http: HttpClient) { }

 public getCategories(filter?: FilterProductsCategoryDto): Observable<IPagedList<IProductCategory>> {
    var params = filter ? new HttpParams({fromObject: filter as any}) : null;

    return this.http.get<IPagedList<IProductCategory>>( this.baseUrl + '/ProductCategory', { params });
  }

  public getCategoryBySlug(slug: string, filter?: FilterProductCategoryDto): Observable<IProductCategory> {
    var params = filter ? new HttpParams({fromObject: filter as any}) : null;

    return this.http.get<IProductCategory>(this.baseUrl + '/ProductCategory/slug/' + slug, {
       params
    });
  }

}

IBaseFilterDto.ts

export interface IBaseFilterDto {
  sort?: string;
  include?: string;
  page?: number;
  pageSize?: number;
}