Preheat oven to 325°F (140°C). Grease a Bundt cake well. Set aside.
Add flour, baking powder, baking soda, and salt to a medium sized bowl. Whisk to combine. Set aside.
Add butter and sugar to a large mixing bowl and beat until butter is lightened in colour and well mixed together, about 3 minutes.
Add eggs, one at a time, and mix until well combined. Scrape down the sides and bottom of the bowl as needed.
Add milk and vanilla and mix until combined.
Remove half of the batter to another bowl. Add lemon juice, zest, and yellow food colouring to the first half, and mix to combine.
Add strawberry puree and pink food colouring to the second half, and mix.
Alternate adding lemon and strawberry batters to the prepared pan. Use a knife to swirl the batter for a swirled appearance.
Bake for 75-85 minutes, or until golden, and a tooth pick inserted in the middle of the cake comes out clean.
Let cake cool in it's pan for 30 minutes, then turn out on a wired rack to cool completely.