Telephone field different style to other fields

Hi,

The telephone field in my contact form looks different to the other fields, the colour and box shape is different. I was wondering if there is any way to fix this. Thanks

<label> Nombre de Empresa (*)
[text* your-companyname] </label>

<label> Nombre (*)
[text* your-name] </label>

<label> Provincia (*)
[text* your-province] </label>

<label> E-mail (*)
[email* your-email] </label>

<label> Teléfono (*)
[tel* tel-26] </label>

<label> Consulta
[textarea your-message] </label>

[submit “Enviar”]