The Seattle Seahawks unveiled their name and original logos to the world on June 17, 1975; at the time, the name 'Seahawks' was described by GM John Thompson as "a tough, fish-eating bird". The name was selected by the team from a list of 1741 names submitted by fans, 150 different people submitted the "Seahawks" name. Their logo is based off of the Seattle-area Native American culture.
The Seahawks have used a variation of their original mark throughout their entire franchise history, making tweaks to the design to modernize when approrpiate. A grey helmet was used for the first 26 seasons and was intended to be used alongside the modern blue lid as a road-only helmet beginning in 2002, however the NFL quickly ended that plan. A fan vote was held to choose which colour the team would use full-time with blue ultimately prevailing.
1976 - 1981
1982
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1991 - 2001
2002 - 2011
2002 - 2007
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2012 - Pres
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1982
1983 - 1990
1991 - 2001
2002 - 2011
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2012 - Pres
2012 - Pres
2012 - Pres
1976 - 2001
1976 - 2001
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1976 - 2001
1976 - 2001
2002 - 2011
2002 - 2011
2012 - Pres
2012 - Pres
2012 - Pres
1976 - 2001 
2002 - 2011 
1976 - 2001 
1976 - 2001 
2012 - Pres 
2012 - Pres 
2012 - Pres 
2002 - 2011 
1976 - 1982 
1983 - 2001 
2002 - 2011 
2012 - Pres 
1976 - 2001 
2009 - 2011 
2012 - Pres 
1985 
2000 
2005 
2005 
2013 
2013 
2004 - 2010 
2011 - Pres 
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1990 - 2001 
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2002 
1981 
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1981 