Add the Petroff qualitative color sequences (#92)

* Add the Petroff qualitative color sequences

* style(pre-commit.ci): auto fixes [...]

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: apcamargo

src/cmap/data/petroff/__init__.py

@@ -0,0 +1,32 @@
+petroff6 = [
+    [87, 144, 252],  # blue
+    [248, 156, 32],  # orange
+    [228, 37, 54],  # red
+    [150, 74, 139],  # purple
+    [156, 156, 161],  # gray
+    [122, 33, 221],  # purple
+]
+
+petroff8 = [
+    [24, 69, 251],  # blue
+    [255, 94, 2],  # orange
+    [201, 31, 22],  # red
+    [200, 73, 169],  # purple
+    [173, 173, 125],  # gray
+    [134, 200, 221],  # light blue
+    [87, 141, 255],  # blue
+    [101, 99, 100],  # gray
+]
+
+petroff10 = [
+    [63, 144, 218],  # blue
+    [255, 169, 14],  # orange
+    [189, 31, 1],  # red
+    [148, 164, 162],  # gray
+    [131, 45, 182],  # purple
+    [169, 107, 89],  # brown
+    [231, 99, 0],  # orange
+    [185, 172, 112],  # tan
+    [113, 117, 129],  # gray
+    [146, 218, 221],  # light blue
+]

src/cmap/data/petroff/record.json

@@ -0,0 +1,23 @@
+{
+  "authors": [
+    "Matthew A. Petroff"
+  ],
+  "category": "qualitative",
+  "colormaps": {
+    "petroff10": {
+      "data": "cmap.data.petroff:petroff10",
+      "interpolation": false
+    },
+    "petroff6": {
+      "data": "cmap.data.petroff:petroff6",
+      "interpolation": false
+    },
+    "petroff8": {
+      "data": "cmap.data.petroff:petroff8",
+      "interpolation": false
+    }
+  },
+  "info": "Color sequences generated using a data-driven aesthetic-preference model and accessibility constraints.",
+  "namespace": "petroff",
+  "source": "https://arxiv.org/abs/2107.02270"
+}