Týr

Týr - God of War, Law, and Justice. Týr is mainly known for losing his hand in the sources surrounding the Binding of wolf Fenrir. The Wolf that was brought up by the gods and only Týr had the courage to go up
to it and give it food. Due to the prophecies foretold that it was doomed to do them injury, the Æsir adopted the plan of binding the wolf. In order to Bind the Wolf, Týr sacrificed his hand doing so.

From the information from sources I have read about, making offerings to Týr would be the courage to do difficult things rather than an offering of objects. Tyr does not tolerate oath-breaking. Altar's consist of weapons with a knotted cord, for oaths and the rune Teiwaz. Colours are Steel grey and dark red.
Happy Tiwesdæg!
Hail Týr!
Soft and smooth
like a silken ribbon,
yet firm and fast as well:
the Aesir wished
the wolf to try
Gleipnir against his strength.
The wolf had guessed
that guile and tricks
were used to form that fetter;
a pledge as proof
to place in his mouth,
he demanded from the mighty Aesir.
And almost all
the Aesir refused
to pledge the price required,
but honourable Týr
offered his hand,
the weregild the "the wolf desired..
With the slender band,
they bound the wolf:
that fetter firmly held!
But the wolf’s price
was paid by Týr:
in lying he lost his hand.

https://www.facebook.com/mimirswellofwisdom/posts/103877551096633