Blue.
I don't see that part about not copying characteristic settings of card text. Here's the relevant rule:
502.40c The spell has the characteristics of the main spell, plus the text boxes of each of the spliced
cards. The spell doesn’t gain any other characteristics (name, mana cost, color, supertypes,
types, subtypes, etc.) of the spliced cards. Text copied onto the spell that refers to a card by
name refers to the spell on the stack, not the card from which the text was copied.
Example: Glacial Ray is a red card with splice onto Arcane that reads, “Glacial Ray
deals 2 damage to target creature or player.” Suppose Glacial Ray is spliced onto
Reach Through Mists, a blue spell. The spell is still blue, and Reach Through Mists
deals the damage. This means that the ability can target a creature with protection from
red and deal 2 damage to that creature.
Splice does not change any characteristics of the original spell. It simply adds text to the box there. Splicing on a card does not change its card type, color, converted mana cost, etc. HOWEVER, the "Evermind is blue" text get copied as well. By the above paragraph, when text that refers to a card name gets spliced onto a card, it refers to the card ON THE STACK, not the one it was spliced on to. Therefore, the card on the stack will look like this
Glacial Ray
1R
Instant - Arcane
Glacial Ray deals 2 damage to target creature or player.
Draw a card.
*Glacial Ray* is blue.