"Light blue and dark blue."

Translation: Lyseblå og mørkeblå.

[Rina_Irina]

Light blue comes up with lyseblåt as the 1st suggestion in help which is wrong

[Frederikbr]

It depends on the gender. Can be either

[jack892871]

what is the difference between lyseblåt and lyseblå

[RyagonIV]

Blåt is used with indefinite neuter gender words: et blåt hus
Blå is used in all oder cases: en blå bil, blå bjørne, den blå frugt, det blå æg, de blå billeder