custom CSS for summary not working (template 7.0)

I am trying to customize the colour of the text in my summary. I’ve tried code from several different places and nothing works. I think that what I want is as follows:

.sqs-block-summary-v2 {
.summary-excerpt {color: #5b417e; 
} }

It was suggested in another post that perhaps some of my other custom code has an error in it but I don't know enough about coding to know if that's the case. 

Below is the custom code I've already used. It all did what I wanted it to do.

/*INSERT A GRAPHIC INTO TRANSPARENT FOOTER*/
 #navigator footer#bottomBar {
     background-image: url('https://lgryfe.files.wordpress.com/2016/01/20172footer10.jpg') !important;
     background-repeat: repeat-x;
     background-position: center left !important;
 }

/* make announcement bar permanent*/
.sqs-announcement-bar-close { display: none !important }

/*transparent header*/
 #navigator footer#topBar {
     background: none repeat scroll 0 0 rgb(91, 64, 132);
 }

/* deepen header*/
#navigator header#topBar ul#nav { padding: 80px 0 65px 0; }

/* remove "view" from rollover*/
 #grid .project-title h3 {
   display: none; 
}

/*captions under gallery images*/
 .sqs-gallery-block-grid .slide .margin-wrapper .image-slide-title { display: block; }

/*create two-column grid on home page*/ @media screen and (min-width: 640px) { 
#block-yui_3_17_2_1_1600535598334_8254 {   
    margin-left: auto;
    margin-right: auto;
  width: 550px; } }

/*change caption size*/
.sqs-block.image-block .image-caption-wrapper p { font-size: 16px; }

I think the code is correct. Can you share link to page where you use Summary? We can check problem easier.