change config format

data/theme.json

@@ -0,0 +1,21 @@
+{
+	"color": {
+		"fg": "ffffff",
+		"fg_dark": "b8bcc1",
+		"fg_accent": "9988ff",
+		"bg": "0d1117",
+		"bg_accent_light":"510079",
+		"bg_accent_dark":"020030"
+	},
+	"opacity": {
+		"low": 0.2,
+		"med": 0.55,
+		"high": 0.85
+	},
+	"font": {
+		"name_regular": "Roboto",
+		"name_mono": "Roboto Mono",
+		"size_base_pt": 12,
+		"size_step_pt": 1.5
+	}
+}