style.css

body {
  font-family: avenir, arial, sans-serif, monospace;
  background: black;
  color: white;
}

#instructions {
  color: white;
  font-weight: normal;
  border: solid black;
  border-width: 0.5rem 0 0;
  padding-top: 0.5rem;
  display: inline-block;
  transition: border-color 0.25s;
}

canvas {
  background: white;
  outline: none;
  border-radius: 0.25rem;
  margin-bottom: 1rem;
}
canvas:focus {
  outline: 10px solid #555;
}

button:not(:last-child) {
  border: 2px solid whitesmoke;
  height: 3rem;
  margin-right: 10px;
}

.color-group {
  display: flex;
  flex-direction: row;
  background: #333;
  padding: 10px;
  max-width: 600px;
  margin: auto;
  border-radius: 0.25rem;
}
.color-group:hover, .color-group:focus-within {
  background: #555;
}
.color-group button {
  flex: 1;
  border: none;
}
.color-group button#clear, .color-group button#download {
  border-radius: 1rem;
  font-size: medium;
}
.color-group button:hover, .color-group button:focus {
  background: #555;
  color: white;
  outline: 4px solid white !important;
}
.color-group button:hover#white, .color-group button:focus#white {
  outline-color: black !important;
}

.center-horizontally {
  text-align: center;
}

#red {
  background: red;
}
#red:hover:before, #red:focus:before {
  content: "Red";
}

#orange {
  background: orange;
}
#orange:hover:before, #orange:focus:before {
  content: "Orange";
  color: black;
}

#yellow {
  background: yellow;
}
#yellow:hover:before, #yellow:focus:before {
  content: "Yellow";
  color: black;
}

#green {
  background: green;
}
#green:hover:before, #green:focus:before {
  content: "Green";
}

#blue {
  background: blue;
}
#blue:hover:before, #blue:focus:before {
  content: "Blue";
}

#white {
  background: white;
}
#white:hover:before, #white:focus:before {
  content: "White";
  color: black;
}

#black {
  background: black;
}
#black:hover:before, #black:focus:before {
  content: "Black";
}

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