From BSicon_uexSTR2+1, using #003399 dark blue color (meaning navigable waterway or underground)
<a href="//commons.wikimedia.org/wiki/User:DePiep" title="User:DePiep">DePiep</a>
2012-12-23 13:15:54
<span class="int-own-work" lang="en">Own work</span>