Consistency is key.
It's your brand, your logo and your colour. Own it.
We all recognise the Coca Cola branding. We don't need to see the words or a can of the stuff to know what it is - we recognise it from the typeface, the colour and even just it being Christmas.
By keeping all of your branding consitent, your customers will start to associate your business with everything that you produce - from fliers to presentations to adverts.
Your brand isn't just a logo or a colour though - it is your tone of voice, your values and your message. All of this needs to be the same throughout your brochures and posters, your website and social media and even the way that you answer the telephone and send emails.