[MD History] Color tweaks.

chrome/browser/resources/md_history/history_item.html

 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/cr/ui/focus_row.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-styles/shadow.html">
 <link rel="import" href="chrome://resources/html/icon.html">
 <link rel="import" href="chrome://resources/html/util.html">
 <link rel="import" href="chrome://history/browser_service.html">
 <link rel="import" href="chrome://history/constants.html">
 <link rel="import" href="chrome://history/searched_label.html">
 <link rel="import" href="chrome://history/shared_style.html">
 
 <!-- Lazy loaded: paper-icon-button-light. -->
 
 <dom-module id="history-item">
   <template>
     <style include="shared-style">
       :host {
-        --checked-color: rgb(68, 136, 255);
         display: block;
         outline: none;
         pointer-events: none;
       }
 
       /** Unresolved paper-icon-button-light styles. */
       button {
         background: none;
         border: none;
         outline: none;
@@ skipping 44 matching lines @@
       }
 
       #checkbox {
         -webkit-margin-end: 6px;
         -webkit-margin-start: 10px;
         height: 40px;
         width: 40px;
       }
 
       :host([selected]) #checkbox {
-        color: var(--checked-color);
+        color: var(--interactive-color);
       }
 
       #checkmark {
         border: 2px solid var(--secondary-text-color);
         border-radius: 2px;
         height: 12px;
         margin: 12px;
         width: 12px;
       }
 
       #checkmark::after {
         border-color: inherit;
         border-style: solid;
         border-width: 0 2px 2px 0;
         content: '';
         display: block;
         height: 70%;
         transform: scale(0) rotate(45deg);
         transform-origin: 97% 86%;
         width: 36%;
       }
 
       :host-context([dir='rtl']) #checkmark::after {
         transform-origin: 50% 14%;
       }
 
       :host([selected]) #checkmark {
-        background: var(--checked-color);
-        border-color: var(--checked-color);
+        background: var(--interactive-color);
+        border-color: var(--interactive-color);
       }
 
       :host([selected]) #checkmark::after {
         border-color: white;
         transform: scale(1) rotate(45deg);
         /* Only animate when showing checkmark. */
         transition: transform 140ms ease-out;
       }
 
       #time-accessed {
-        color: #646464;
+        color: var(--history-item-time-color);
         min-width: 96px;
       }
 
       #domain {
         -webkit-margin-start: 16px;
         color: var(--secondary-text-color);
         flex-shrink: 0;
       }
 
       #menu-button {
         -webkit-margin-end: 12px;
       }
 
       #star-container {
         -webkit-margin-end: 4px;
         -webkit-margin-start: 12px;
         width: 32px;
       }
 
       #bookmark-star {
-        color: var(--checked-color);
+        color: var(--interactive-color);
         height: 32px;
         width: 32px;
       }
 
       #bookmark-star iron-icon {
         height: 16px;
         width: 16px;
       }
 
       #time-gap-separator {
@@ skipping 93 matching lines @@
           <div></div>
           <div></div>
           <div></div>
         </button>
       </div>
       <div id="time-gap-separator" hidden="[[!hasTimeGap]]"></div>
     </div>
   </template>
   <script src="chrome://history/history_item.js"></script>
 </dom-module>