All Chroma Blooks.
Chroma is the rarest tier you can pull from a normal pack. There are roughly 80 Chromas across pack drops, contest awards, and 100%-guaranteed seasonal windows. Drop rates from packs span 0.02% (Rainbow Panda, Tropical Globe) up to 0.08% (Ice Slime). This page splits Chromas into three buckets, the only way the math actually makes sense.
Chroma sits one tier above Legendary in the full blook catalog and represents the bulk of the chases tracked in the blook value guide. The strategic walkthrough for picking a target without burning every token on Safari Packs is in chroma hunting, and if you'd rather skip the chase entirely, the guaranteed-Chroma pack list covers the seasonal 100% windows. Run the math for any rate below in the blooket calculator, or read the canonical Chroma Blook glossary entry for the definition and sourcing.
Pack + event + seasonal. Chroma has the highest blook count of any tier.
Rainbow Panda & Tropical Globe at the floor; Ice Slime at the ceiling.
Lovely / Lucky / Spring packs guarantee a Chroma per opening.
The 9 Chromas you can chase via packs.
Sorted rarest → most common. The 50/90/99% columns are pack counts at the listed drop rate. Multiply by the pack cost (20 or 25 tokens) for total token spend.
| Blook | Pack | Drop rate | 50% | 90% | 99% | Sell | |
|---|---|---|---|---|---|---|---|
 Rainbow Panda | Safari Pack | 0.02% | 3,466 | 11,512 | 23,024 | 3,500–6,000 | Chase → |
 Ice Crab | Ice Monster Pack | 0.02% | 3,466 | 11,512 | 23,024 | 1,500–2,400 | , |
 Pirate Pufferfish | Pirate Pack | 0.03% | 2,311 | 7,675 | 15,349 | 1,200–2,000 | , |
 Teal Platypus | Outback Pack | 0.03% | 2,311 | 7,675 | 15,349 | 1,000–1,800 | , |
 Blue Butterfly | Bug Pack | 0.03% | 2,311 | 7,675 | 15,349 | 1,000–1,700 | , |
 Half a Sandwich | Lunch Pack | 0.04% | 1,733 | 5,756 | 11,511 | 1,200–2,000 | , |
 Frozen Fossil | Ice Monster Pack | 0.05% | 1,386 | 4,605 | 9,209 | 900–1,500 | , |
 Red Astronaut | Space Pack | 0.05% | 1,386 | 4,605 | 9,209 | 2,200–3,800 | Chase → |
 Ice Slime | Ice Monster Pack | 0.08% | 867 | 2,878 | 5,755 | 700–1,200 | , |
Note: the seven Colored Astronauts (Red shown above + Black, Brown, Green, Orange, Pink, Yellow) each rotate on their own weekday in the Space Pack. Same 0.05% rate per color, but only available 1 of 7 days, the effective chase length multiplies by 7 if you only play on one weekday.
Why each pack Chroma is what it is.
Rainbow Panda
Safari PackTied with Tropical Globe for the rarest pack-Chroma at 0.02%. The default benchmark for chase math on every Blooket calculator.
Ice Crab
Ice Monster PackRarest of the three Ice Monster Chromas. The pack's tier rate is high (0.15% combined), but it's split 8:5:2, Ice Crab gets the smallest slice.
Pirate Pufferfish
Pirate PackOriginally a 'formerly unreleased' Blook before the Pirate Pack launch. 0.03% drop puts it in Mega Bot territory.
Teal Platypus
Outback PackAustralia-themed Chroma. Pairs with Sugar Glider Legendary as the dual chase for the Outback set.
Blue Butterfly
Bug PackReleased March 5, 2025 alongside the Bug Pack, Blooket added the pack unannounced.
Half a Sandwich
Lunch PackNewest pack Chroma (Sept 2025). Lunch Pack costs 25 tokens, so the chase math is 25% more expensive than Safari per pack.
Frozen Fossil
Ice Monster PackMid-rarity of the three Ice Monster Chromas. 5/15 weight share of the pack's 0.15% Chroma tier.
Red Astronaut
Space PackOne of seven Colored Astronauts in the daily rotation. Each color is on its own day, chase math is 7× longer if you only play one weekday.
Ice Slime
Ice Monster PackMost common Chroma in the entire game at 0.08%. ~870 packs to a 50% chance, half the work of Rainbow Panda.
Seven colors, one per weekday in Space Pack.
Mon → Pink, Tue → Yellow, Wed → Black, Thu → Orange, Fri → Red, Sat → Brown, Sun → Green. Rotation flips at 6:00 PM Eastern Time, so a Blooket weekday runs 6 PM ET → 6 PM ET.
Pink Astronaut
Yellow Astronaut
Black Astronaut
Orange AstronautRed Astronaut
Brown Astronaut
Green AstronautAll seven sit at 0.05% each, but only the day's color is in the drop pool. Two more astronaut chromas exist outside the rotation: Cyan Astronaut (top 10 of Pokemon Are Cool event) and Lime Astronaut (top 3 of the same event), both contest-only and permanently unobtainable from packs. Full chase math is on the Red Astronaut chase page.
No drop rate. You win it once.
Awarded to leaderboard winners and event participants. No way to chase these via packs, they're unrecoverable if you missed the window.
Spooky Mummy
ChromaFewer than 20 players. wikiHow ranks it #6 on the all-time rarest list, rarer than Rainbow Panda by player count.
Tropical Globe
Chroma0.02% when it was in the Blizzard Pack. Now obtainable only via the contest reward path. wikiHow #7.
Agent Owl
ChromaDetective-themed Chroma. Limited award pool, no pack reissue.
Cyan Astronaut
Chroma8th Astronaut Chroma. Awarded to the top 10, rarer than the daily-rotation Astronauts.
Lime Astronaut
Chroma9th Astronaut Chroma. Top-3 only, even rarer than Cyan, by definition.
100%-guaranteed Chroma packs.
Three seasonal packs guarantee a Chroma per open. 2,000 tokens / 4-day window. The math beats any chase against a 0.02% pack pull.
Lovely Frog
Chroma100% drop, 4-day window. 2,000 tokens guarantees the Chroma, equivalent to 100 packs of normal opening with no chase risk.
Lucky Frog
Chroma100% drop, 4-day window. Same math as Lovely Frog. Stack tokens before March if this is on your wishlist.
Spring Chick
Chroma100% drop, 4-day window. Newest of the seasonal trio.
Tools for the Chroma chase.
Chroma Hunting
Strategy guide for building a Chroma collection without burning every token on Safari packs.
Chance Calculator
Custom thresholds for any Chroma drop rate. Forward (rate → packs) and backward (packs → chance).
Rarest Blooks
Top 10 rarest in the game across all tiers. Three Chromas make the list.