Most of Your Hands Will Not Be Double-Suited
Every PLO strategy article raves about double-suited hands, and rightly so. But most of the hands you are dealt will not be double-suited. They will be either single-suited or rainbow. Knowing how to evaluate those hands -- and when rainbow is still playable -- is far more relevant to your daily win rate than obsessing over the double-suited premium.
What Single-Suited Actually Gives You
A single-suited hand has exactly one pair of cards sharing a suit. K♠Q♠J♥9♦ has two spades. That means a meaningful slice of flops will give you a flush draw that the rainbow version of the same ranks could never have.
That matters because of what happens when you hit. With the K♠ in your hand, you have the second-nut flush draw in spades. If the board runs out with three spades and no ace of spades among them, you have the king-high flush -- a strong but not invincible hand.
The critical factor for single-suited hands is which card is suited. A suited ace is vastly more valuable than any other suited card because it guarantees nut flush potential. A♠T♠J♥8♦ has the nut spade draw. K♠T♠J♥8♦ has the second-nut draw -- still good, but you will occasionally run into the ace-high flush and lose a big pot. Q♠T♠ or worse as your suited pair starts creating dangerous non-nut flush situations.
Rainbow: The Ugly Truth
Rainbow means no two of your four cards share a suit. You have zero flush draw potential. On a board like 8♠5♠2♠, a rainbow hand has absolutely nothing unless it made a set or a straight -- and even then, it has no redraw against flush draws.
This is the fundamental problem with rainbow hands: they have fewer ways to win. A connected, double-suited hand like T♠9♠8♥7♥ can win by making a straight, making a flush in two suits, or hitting a combination draw. A rainbow version of the same ranks -- T♦9♣8♥7♠ -- can only win by making a straight. One path to victory versus three.
The equity difference is measurable. Compare these two hands against aces:
When Rainbow Hands Are Still Playable
Despite their disadvantage, some rainbow hands are worth playing. The key is that connectivity and nut straight potential must compensate for the missing flush equity.
High smooth rundowns. K♦Q♣J♥T♠ (rainbow) is still a good hand. The connectivity is perfect, every straight it makes is the nuts or near-nuts, and the hand will flop massive wrap draws on a wide range of boards. You will miss out on flush pots, but your straight equity is so high that the hand remains profitable in position.
Premium pairs with broadway side cards. A♦A♣K♥Q♠ (rainbow aces) is playable because the aces and the broadway connectivity carry the hand. You would much prefer A♠A♥K♠Q♥, but you cannot fold aces just because they are rainbow. Adjust by playing smaller pots and being more willing to release postflop on bad boards. More on this in the AAxx evaluation guide.
Strong pairs with connectivity. K♦K♣Q♥J♠ (rainbow) has top-pair potential, set potential, and straight draws. It is weaker than the double-suited version but not unplayable. The pair provides a floor, and the broadway connectivity provides upside.
When Rainbow Hands Are Trash
The moment connectivity drops, rainbow hands become clear folds. K♦8♣5♥2♠ has a high card, but nothing else. No flush draws, no straight draws, and the king will make top pair on K-high boards but with zero redraws. You will win some small pots and lose some enormous ones.
Even moderately connected rainbow hands can be folds from early position. 9♦8♣6♥5♠ has some connectivity, but the gap (missing 7), the low ranks, and the complete absence of flush equity make this a losing proposition from UTG in a six-handed game. From the button with multiple limpers, it becomes a marginal call at best.
How Position Interacts With Suitedness
Position amplifies suitedness value and punishes the lack of it. In position with a single-suited hand, you control pot size when you miss and extract value when you hit. You can call flush draw flops in position with good odds, or check behind dry boards for a free card.
Out of position with a rainbow hand, every option is bad. You flop bottom pair and no draws. Check-call? Check-fold? Rainbow hands OOP are left guessing, while even a single-suited hand can say "I have the nut flush draw" and play accordingly.
Tighten your range significantly for rainbow hands from early position and the blinds. Save them for the button and cutoff where position offsets the suitedness penalty.
The Quick Decision Framework
Ask three questions: (1) Would this hand be playable as double-suited? If no, fold. (2) How strong is the connectivity? Smooth four-card sequences compensate for missing suits; gaps plus no suits is a fold. (3) What position am I in? Button or cutoff: single-suited is fine, rainbow is okay with great connectivity. UTG or blinds: single-suited is marginal, rainbow needs a premium pair or smooth broadway rundown.
Quantifying the Gap on a Wet Board
When a flush-friendly board hits, the gap between suited and rainbow becomes enormous. On a board like K♠9♠4♥:
A♠Q♠J♥T♦ (nut flush draw + straight draws) vs K♦J♦T♣9♣ (two pair, no flush draw)
The single-suited hand with the nut flush draw is competitive against two pair here. A rainbow hand with the same ranks but no spades would be in much worse shape -- it would have straight draws only, and the flush would be a constant threat rather than an asset.
FAQ
Is a single-suited hand closer in value to double-suited or rainbow? It depends on whether the suited cards include an ace. A♠K♠Q♥J♦ (single-suited with nut potential) is much closer to double-suited strength than a hand like Q♠8♠J♥T♦ where the flush draw is not to the nuts. The ace of suit closes a meaningful part of the gap between single-suited and double-suited.
Can I 3-bet with rainbow hands? Rarely. Rainbow aces can be 3-bet to thin the field and avoid multiway pots where the lack of flush equity hurts most. Other rainbow hands are almost never worth 3-betting because you are inflating the pot with a hand that has fewer ways to win. Stick to calling in position. See the flatting vs 3-betting breakdown for more.
What is worse: rainbow with connectivity, or double-suited with no connectivity? Rainbow with connectivity is better. Connectivity is the most important hand property in PLO. A rainbow T-9-8-7 will outperform a double-suited K-7-4-2 over any meaningful sample. Suitedness is a multiplier; connectivity is the foundation.