Generated by SassMeister.com.

SassMeister-input-HTML.haml

.all
  -['axal',
  'sean',
  'dave',
  'andrew',
  'dmitry', 
  'tom', 
  'malcolm', 
  'bryan', 
  'chrisf', 
  'kevin', 
  'chenry', 
  'dallas', 
  'jackie', 
  'jess', 
  'john',
  'kras', 
  'ko', 
  'manny', 
  'mark', 
  'klein', 
  'sherov', 
  'matt', 
  'nina', 
  'rachel', 
  'prince'].each do |dev|
    %div{:class => "dev #{dev}"}

SassMeister-input.scss

// ----
// Sass (v3.3.0.rc.2)
// Compass (v1.0.0.alpha.17)
// ----

$devs: axal, sean, dave, andrew, dmitry, tom, malcolm, bryan, chrisf, kevin, chenry, dallas, jackie, jess, john, kras, ko, manny, mark, klein, sherov, matt, nina, rachel, prince;

@each $dev in $devs {
  .#{$dev} {
    background: #005cff;
    &:after {
      content: "#{$dev}";
    }
  }
}

html {
  font-family: sans-serif;
}

.dev {
  background: #ccc;
  width: 80px;
  height: 80px;
  float: left;
  margin-right: 5px;
  margin-bottom: 5px;
  padding: 5px;
}

.dev:not(.jackie) {
  background: pink;
}

// .dev:not(.jackie) + .dave ~ .dev {
//   background: orange;
// }

SassMeister-output.css

.axal {
  background: #005cff;
}
.axal:after {
  content: "axal";
}

.sean {
  background: #005cff;
}
.sean:after {
  content: "sean";
}

.dave {
  background: #005cff;
}
.dave:after {
  content: "dave";
}

.andrew {
  background: #005cff;
}
.andrew:after {
  content: "andrew";
}

.dmitry {
  background: #005cff;
}
.dmitry:after {
  content: "dmitry";
}

.tom {
  background: #005cff;
}
.tom:after {
  content: "tom";
}

.malcolm {
  background: #005cff;
}
.malcolm:after {
  content: "malcolm";
}

.bryan {
  background: #005cff;
}
.bryan:after {
  content: "bryan";
}

.chrisf {
  background: #005cff;
}
.chrisf:after {
  content: "chrisf";
}

.kevin {
  background: #005cff;
}
.kevin:after {
  content: "kevin";
}

.chenry {
  background: #005cff;
}
.chenry:after {
  content: "chenry";
}

.dallas {
  background: #005cff;
}
.dallas:after {
  content: "dallas";
}

.jackie {
  background: #005cff;
}
.jackie:after {
  content: "jackie";
}

.jess {
  background: #005cff;
}
.jess:after {
  content: "jess";
}

.john {
  background: #005cff;
}
.john:after {
  content: "john";
}

.kras {
  background: #005cff;
}
.kras:after {
  content: "kras";
}

.ko {
  background: #005cff;
}
.ko:after {
  content: "ko";
}

.manny {
  background: #005cff;
}
.manny:after {
  content: "manny";
}

.mark {
  background: #005cff;
}
.mark:after {
  content: "mark";
}

.klein {
  background: #005cff;
}
.klein:after {
  content: "klein";
}

.sherov {
  background: #005cff;
}
.sherov:after {
  content: "sherov";
}

.matt {
  background: #005cff;
}
.matt:after {
  content: "matt";
}

.nina {
  background: #005cff;
}
.nina:after {
  content: "nina";
}

.rachel {
  background: #005cff;
}
.rachel:after {
  content: "rachel";
}

.prince {
  background: #005cff;
}
.prince:after {
  content: "prince";
}

html {
  font-family: sans-serif;
}

.dev {
  background: #ccc;
  width: 80px;
  height: 80px;
  float: left;
  margin-right: 5px;
  margin-bottom: 5px;
  padding: 5px;
}

.dev:not(.jackie) {
  background: pink;
}

SassMeister-rendered.html

<div class='all'>
  <div class='dev axal'></div>
  <div class='dev sean'></div>
  <div class='dev dave'></div>
  <div class='dev andrew'></div>
  <div class='dev dmitry'></div>
  <div class='dev tom'></div>
  <div class='dev malcolm'></div>
  <div class='dev bryan'></div>
  <div class='dev chrisf'></div>
  <div class='dev kevin'></div>
  <div class='dev chenry'></div>
  <div class='dev dallas'></div>
  <div class='dev jackie'></div>
  <div class='dev jess'></div>
  <div class='dev john'></div>
  <div class='dev kras'></div>
  <div class='dev ko'></div>
  <div class='dev manny'></div>
  <div class='dev mark'></div>
  <div class='dev klein'></div>
  <div class='dev sherov'></div>
  <div class='dev matt'></div>
  <div class='dev nina'></div>
  <div class='dev rachel'></div>
  <div class='dev prince'></div>
</div>