S4C was launched on November 1, 1982 in Wales, one day before Channel 4 in the rest of the United Kingdom, and used the "WALES4CYMRU" logo. S4C stands for Sianel Pedwar Cymru which is Welsh for Channel 4 Wales.
In 1988, the ident changed to a computer-generated ident featuring an animation of the streamlined S4C logo, the colours of the logo were blue, green and red and the font was "Bodoni". The early 1990s saw a more "traditional" ident from S4C, depicting a piece of Welsh slate with colour blue green and red washing over the letters S4C.
On March 7, 1995, S4C introduced a new logo, with a red tilde resembling a dragon's tongue at the end of the S4C wordmark and the font was "Futura".
And the star of the logo, the dragon, is seen in the idents of the channel.
This logo was introduced on January 18, 2007. It was part of a total rebrand of the channel made by Proud Creative. In the rebrand, stereotyphical Welsh icons such as dragons were avoided in favour of an "inherently Welsh" tone.
Sianel 4 Cymru
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