styles.css

.react-colorful {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 200px;
  height: 200px;
  user-select: none;
  cursor: default;
}

.react-colorful__saturation {
  position: relative;
  flex-grow: 1;
  border-color: transparent; /* Fixes https://github.com/omgovich/react-colorful/issues/139 */
  border-bottom: 12px solid #000;
  border-radius: 8px 8px 0 0;
  background-image: linear-gradient(to top, #000, rgba(0, 0, 0, 0)),
    linear-gradient(to right, #fff, rgba(255, 255, 255, 0));
}

.react-colorful__pointer-fill,
.react-colorful__alpha-gradient {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  border-radius: inherit;
}

/* Improve elements rendering on light backgrounds */
.react-colorful__alpha-gradient,
.react-colorful__saturation {
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.05);
}

.react-colorful__hue,
.react-colorful__alpha {
  position: relative;
  height: 24px;
}

.react-colorful__hue {
  background: linear-gradient(
    to right,
    #f00 0%,
    #ff0 17%,
    #0f0 33%,
    #0ff 50%,
    #00f 67%,
    #f0f 83%,
    #f00 100%
  );
}

/* Round bottom corners of the last element: `Hue` for `ColorPicker` or `Alpha` for `AlphaColorPicker` */
.react-colorful__last-control {
  border-radius: 0 0 8px 8px;
}

.react-colorful__interactive {
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  border-radius: inherit;
  outline: none;
  /* Don't trigger the default scrolling behavior when the event is originating from this element */
  touch-action: none;
}

.react-colorful__pointer {
  position: absolute;
  z-index: 1;
  box-sizing: border-box;
  width: 28px;
  height: 28px;
  transform: translate(-50%, -50%);
  background-color: #fff;
  border: 2px solid #fff;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.react-colorful__interactive:focus .react-colorful__pointer {
  transform: translate(-50%, -50%) scale(1.1);
}

/* Chessboard-like pattern for alpha related elements */
.react-colorful__alpha,
.react-colorful__alpha-pointer {
  background-color: #fff;
  background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill-opacity=".05"><rect x="8" width="8" height="8"/><rect y="8" width="8" height="8"/></svg>');
}

/* Display the saturation pointer over the hue one */
.react-colorful__saturation-pointer {
  z-index: 3;
}

/* Display the hue pointer over the alpha one */
.react-colorful__hue-pointer {
  z-index: 2;
}