1 files changed, 23 insertions, 0 deletions
diff --git a/internal/server/api/helpers.go b/internal/server/api/helpers.go
new file mode 100644
index 0000000..967f308
--- /dev/null
+++ b/internal/server/api/helpers.go
@@ -0,0 +1,23 @@
+package api
+
+import "strings"
+
+const hex = "0123456789abcdefABCDEF"
+
+func isValidHexColor(color string) (bool, string) {
+	if len(color) != 7 {
+		return false, "color must be hex with length of 7"
+	}
+
+	if color[0] != '#' {
+		return false, "color must start with '#'"
+	}
+
+	for _, c := range color {
+		if !strings.ContainsRune(hex, c) {
+			return false, "color must start with '#' and contain exactly 6 digits 0-9, a-f, A-F"
+		}
+	}
+
+	return true, ""
+}