I don't have that many good blue items, yet, in HC. Here are some of my favourites
Chromatic Spiked Shield of the Wolf
Defense: 24
Chance to Block: 30%
Durability: 40 of 40
Required Strength: 30
Required Level: 42
Item Version: 1.10 Expansion
Item Level: 66
Fingerprint: 0x793809ec
+20 to Life
All Resistances +68
Socketed (2: 2 used) (2 Pdiamonds)
Fine Small Charm of the Glacier
Keep in Inventory to Gain Bonus
Required Level: 25
Item Version: 1.10 Expansion
Item Level: 64
Fingerprint: 0x4072023e
+20 to Attack Rating
+1 to Maximum Damage
Adds 3-6 cold damage over 1 seconds
Fine Small Charm of Sustenance
Keep in Inventory to Gain Bonus
Required Level: 21
Item Version: 1.10 Expansion
Item Level: 55
Fingerprint: 0xab3565a3
+15 to Life
+11 to Attack Rating
+3 to Maximum Damage
Then, back from my SC days (I still have most of my stuff here, just to get to look at them now and then

)
Shimmering Grand Charm of Storms
Keep in Inventory to Gain Bonus
Required Level: 27
Item Version: 1.10 Expansion
Item Level: 74
Fingerprint: 0xfc5c0c12
All Resistances +15
Adds 1-25 lightning damage
Pestilent Large Charm of Vita
Keep in Inventory to Gain Bonus
Required Level: 58
Item Version: 1.10 Expansion
Item Level: 83
Fingerprint: 0x916b647d
+29 to Life
+175 poison damage over 6 seconds
Cruel Lance of the Vampire
'AmnShael'
Two-Hand Damage: 95 to 401
Durability: 25 of 25
Required Dexterity: 88
Required Strength: 110
Required Level: 48
Spear Class - Normal Attack Speed
Item Version: 1.10 Expansion
Item Level: 81
Fingerprint: 0xe41b00cd
+252% Enhanced Damage
7% Life stolen per hit
8% Mana stolen per hit
20% Increased Attack Speed
Socketed (2: 2 used)
Graverobber's Grand Charm of Vita
Keep in Inventory to Gain Bonus
Required Level: 69
Item Version: 1.10 Expansion
Item Level: 85
Fingerprint: 0x8e44b33c
+38 to Life
+1 to Summoning Skills (Necromancer Only)
Magekiller's Amulet of the Whale
Required Level: 37
Item Version: 1.10 Expansion
Item Level: 51
Fingerprint: 0x77e02383
+100 to Life
+1 to Assassin Skill Levels
Shadow War Fist of Firebolts
One-Hand Damage: 44 to 53
Durability: 44 of 64
(Assassin Only)
Required Dexterity: 108
Required Strength: 108
Required Level: 51
Claw Class - Slow Attack Speed
Item Version: 1.10 Expansion
Item Level: 86
Fingerprint: 0x1121fe2a
+2 to Wake of Inferno (Assassin Only)
+2 to Mind Blast (Assassin Only)
+3 to Fade (Assassin Only)
+3 to Shadow Discipline Skills (Assassin Only)
10% Chance to cast Level 8 Fire Bolt on striking
Volcanic Heavenly Stone of Enlightenment
One-Hand Damage: 21 to 46
Durability: 14 of 20
(Sorceress Only)
Required Level: 45
Orb Class - Fast Attack Speed
Item Version: 1.10 Expansion
Item Level: 79
Fingerprint: 0x7c3b00c2
+28 to Energy
+33 to Life
+3 to Meteor (Sorceress Only)
+2 to Glacial Spike (Sorceress Only)
+3 to Fire Skills (Sorceress Only)