[gnome-maps] color: Adjust minimum allowed contrast ratio

[Marcus Lundblad <mlundblad src gnome org>]

commit f75f54f31ff789495f9d390cf89333f718f8a5a6
Author: Marcus Lundblad <ml update uu se>
Date:   Mon Nov 4 20:28:30 2019 +0100

    color: Adjust minimum allowed contrast ratio

 src/color.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/color.js b/src/color.js
index 7216a284..feb630a3 100644
--- a/src/color.js
+++ b/src/color.js
@@ -20,7 +20,7 @@
  */
 
 /* Minimum contrast ratio for foreground/background color for i.e. route labels */
-const MIN_CONTRAST_RATIO = 3.0;
+const MIN_CONTRAST_RATIO = 2.0;
 
 /**
  * Parses a given color component index (0: red, 1: green, 2: blue)