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CSS

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HTML 

              
                <div id="app">
  <v-app id="inspire">
    <v-dialog v-model="intro" width="450px">
      <v-card class="mx-auto">
        <v-card-title>Welkom!</v-card-title>
        <v-card-text>
          Op deze pagina kun je voorafgaand aan de Zenya 6.0 release al eens experimenteren met welke kleuren je kunt gebruiken op het portaal. Met de 'verfknop' linksonder kun je kleuren kiezen.
        </v-card-text>
        <v-card-actions>
          <v-spacer></v-spacer>
          <v-btn @click="intro = false" text>Beginnen</v-btn>
        </v-card-actions>
      </v-card>
    </v-dialog>
    <v-dialog v-model="tour" width="450px">
      <v-card class="mx-auto">
        <v-card-title>Kies je kleur</v-card-title>
        <v-card-text>
          <v-color-picker v-model="selected_color" dot-size="25" canvas-height="200" class="ml-10 mb-2" elevation="5" contain mode="hexa"></v-color-picker>

          <div v-if="this.contrast_error" class="error--text">
            Deze kleur heeft onvoldoende contrast. Probeer een donkerdere kleur.
          </div>
        </v-card-text>
        <v-card-actions>
          <v-spacer></v-spacer>
          <v-btn text @click="saveColor">
            <v-icon left class="success--text" color="success" xlarge v-if="checkContrast()">thumb_up</v-icon>
            <v-icon class="error--text" left color="error" xlarge v-else>thumb_down</v-icon>Toepassen
          </v-btn>
        </v-card-actions>
      </v-card>
    </v-dialog>
    <v-btn fab primary fixed left bottom dark color="primary" @click="tour = !tour">
      <v-icon>format_paint</v-icon>
    </v-btn>
    <v-app-bar app color="black" dark>
      <v-app-bar-nav-icon></v-app-bar-nav-icon>
      <v-img class="smaller" contain src="https://www.infoland.nl/wp-content/uploads/2021/02/ZenyaWIT-geen-endorsement-.png"></v-img>
      <v-spacer></v-spacer>
      <v-btn icon>
        <v-icon>help</v-icon>
      </v-btn>
      <v-btn icon>
        <v-icon>notifications</v-icon>
      </v-btn>
      <v-btn icon>
        <v-icon>person</v-icon>
      </v-btn>
    </v-app-bar>
    <v-form class="mt-15">
      <v-container>
        <v-row>
          <v-col cols="12">
            <v-text-field flat outlined label="Type hier een zoekterm" rounded solo prepend-inner-icon="search" hide-details>
              <template v-slot:append>
                <template>
                  <v-menu offset-y>
                    <template v-slot:activator="{ on, attrs }">
                      <v-btn class="notUpperCase" text v-on="on">in Product Development<v-icon right color="primary">keyboard_arrow_down</v-icon>
                      </v-btn>
                    </template>
                    <v-list>
                      <v-list-item>
                        <v-list-item-title>in Product Development</v-list-item-title>
                      </v-list-item>
                      <v-list-item>
                        <v-list-item-text>in alles</v-list-item-text>
                      </v-list-item>
                    </v-list>
                  </v-menu>
                  <v-btn rounded text class="primary--text">
                    <v-icon left>search</v-icon>Zoeken
                  </v-btn>
                </template>
              </template>
            </v-text-field>
          </v-col>
        </v-row>
        <v-row>
          <v-col cols="12" md="3" v-for="item in buttons">
            <v-card color="primary" dark class="tile" @click="">
              <v-card-title class=" ml-0 mr-0 pr-0 pl-0 tileTitle">{{ item.name }}</v-card-title>
              <v-card-text class="alignCenter">
                <v-icon color="primary darken-1">{{item.icon}}</v-icon>
              </v-card-text>
            </v-card>
          </v-col>
        </v-row>
        <v-row>
          <v-col cols="12" md="6">
            <v-card>
              <v-card-title class="primary--text">Nieuws</v-card-title>
              <v-card-text>
                <v-skeleton-loader type="list-item-three-line@1"></v-skeleton-loader>
              </v-card-text>
            </v-card>
          </v-col>
          <v-col cols="12" md="6">
            <v-card>
              <v-card-title class="primary--text">Recent</v-card-title>
              <v-card-text>
                <v-skeleton-loader type="list-item@1"></v-skeleton-loader>
              </v-card-text>
            </v-card>
          </v-col>
          <v-col cols="12" md="6">
            <v-card>
              <v-card-title class="primary--text">Favorieten</v-card-title>
              <v-card-text>
                <v-skeleton-loader type="list-item@3"></v-skeleton-loader>
              </v-card-text>
            </v-card>
          </v-col>
          <v-col cols="12" md="6">
            <v-card>
              <v-card-title class="primary--text">Informatie</v-card-title>
              <v-card-text>
                <v-skeleton-loader type="paragraph"></v-skeleton-loader>
              </v-card-text>
            </v-card>
          </v-col>
        </v-row>
      </v-container>
    </v-form>
  </v-app>
</div>
!

CSS 

              
                #app,
#inspire {
  background-color: #f3f3f3;
}

.smaller {
  height: 60px;
  width: 0px;

  .v-responsive__content,
  .v-responsive__sizer {
    display: none !important;
  }
}

.v-image__image,
.v-image__placeholder {
  width: 200px !important;
}

.notUpperCase {
  text-transform: none !important;
}

.tile {
  height: 70px;
}
.tileTitle {
  letter-spacing: 2px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  overflow-wrap: break-word;
  z-index: 1;
}

.alignCenter {
  text-align: center;
  position: absolute;
  left: 50%;
  top: 60%;
  transform: translate(-50%, -50%);
  z-index: 0;

  i {
    font-size: 60px !important;
  }
}
!

JS 

              
                new Vue({
  el: "#app",
  vuetify: new Vuetify(),
  mounted() {
    var customColor = "";
    var items = window.location.search.split("?");
    var set_color = "#E41B51";
    if (
      items &&
      items.length > 0 &&
      items[1] &&
      items[1].startsWith("color=")
    ) {
      set_color = "#" + items[1].split("=")[1];
    }

    this.$vuetify.theme.themes.dark.primary = set_color;
    this.$vuetify.theme.themes.light.primary = set_color;
    this.selected_color = set_color;
  },
  methods: {
    luminance: function (r, g, b) {
      var a = [r, g, b].map(function (v) {
        v /= 255;
        return v <= 0.03928 ? v / 12.92 : Math.pow((v + 0.055) / 1.055, 2.4);
      });
      return a[0] * 0.2126 + a[1] * 0.7152 + a[2] * 0.0722;
    },
    contrast: function (color1, color2) {
      var lum1 = this.luminance(color1.r, color1.g, color1.b);
      var lum2 = this.luminance(color2.r, color2.g, color2.b);
      var brightest = Math.max(lum1, lum2);
      var darkest = Math.min(lum1, lum2);
      return (brightest + 0.05) / (darkest + 0.05);
    },
    hexToRgb: function (hex) {
      var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
      return result
        ? {
            r: parseInt(result[1], 16),
            g: parseInt(result[2], 16),
            b: parseInt(result[3], 16)
          }
        : null;
    },
    checkContrast: function () {
      return (
        this.contrast(
          this.hexToRgb("#ffffff"),
          this.hexToRgb(this.selected_color)
        ) > 4.5
      );
    },
    saveColor: function () {
      if (!this.checkContrast()) {
        this.contrast_error = true;
      } else {
        this.contrast_error = false;
        this.$vuetify.theme.themes.dark.primary = this.selected_color;
        this.$vuetify.theme.themes.light.primary = this.selected_color;
        this.tour = false;
      }
    }
  },
  data() {
    return {
      tour: false,
      intro: true,
      contrast_error: false,
      selected_color: "",
      pug: 0,
      slides: [
        {
          title: "Zenya",
          text: "Welkom in Zenya, de nieuwe versie van iProva. "
        },
        {
          title: "Wijzigingen aan het portaal",
          text:
            "Zoals je ziet is het portaal behoorlijk aangepast. Toch zie je ook nog goed het oude portaal terug. Binnen het portaal zijn er enkele wijzigingen doorgevoerd: <ul><li>Er is geen 'thuis'-knop meer. Wanneer je nu terug wilt naar je startpagina klik je op het logo in de bovenste balk</li></ul>"
        },
        {
          title: "Overige functionaliteiten",
          text:
            "<p>Dit hulpscherm zul je op andere pagina's ook aantreffen, op plekken waarvan we denken dat je wat extra uitleg kan gebruiken.</p><p>Je kunt dit scherm ook nog altijd terugkijken door op de knop linksonder in het scherm te klikken.</p>"
        },
        {
          title: "Uitzetten",
          text:
            "Sommige mensen vinden dit soort meldingen vervelend. Wanneer jij dit ook vervelend vind kun je deze meldingen ook uitschakelen."
        }
      ],
      buttons: [
        {
          id: 1,
          name: "Raadplegen",
          icon: "chrome_reader_mode"
        },
        {
          id: 2,
          name: "Invullen",
          icon: "assignment"
        },
        {
          id: 3,
          name: "Taken",
          icon: "assignment_turned_in"
        },
        {
          id: 4,
          name: "Dashboard",
          icon: "donut_small"
        }
      ]
    };
  }
});
!
999px

Console