diff --git a/Cargo.lock b/Cargo.lock
index afd2087..0d0e6cf 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -34,6 +34,12 @@ dependencies = [
  "syn 2.0.16",
 ]
 
+[[package]]
+name = "atomic"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c59bdb34bc650a32731b31bd8f0829cc15d24a708ee31559e0bb34f2bc320cba"
+
 [[package]]
 name = "autocfg"
 version = "1.1.0"
@@ -885,10 +891,11 @@ checksum = "e5464a87b239f13a63a501f2701565754bae92d243d4bb7eb12f6d57d2269bf4"
 
 [[package]]
 name = "uuid"
-version = "1.3.3"
+version = "1.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "345444e32442451b267fc254ae85a209c64be56d2890e601a0c37ff0c3c5ecd2"
+checksum = "5e395fcf16a7a3d8127ec99782007af141946b4795001f876d54fb0d55978560"
 dependencies = [
+ "atomic",
  "getrandom",
  "rand",
  "serde",
@@ -898,9 +905,9 @@ dependencies = [
 
 [[package]]
 name = "uuid-macro-internal"
-version = "1.3.3"
+version = "1.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f67b459f42af2e6e1ee213cb9da4dbd022d3320788c3fb3e1b893093f1e45da"
+checksum = "f49e7f3f3db8040a100710a11932239fd30697115e2ba4107080d8252939845e"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index 2adadbf..435d474 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,7 @@ log = "0.4"
 wasm-logger = "0.2"
 regex = "1"
 lazy_static = "1.4"
-uuid = { version = "1.3", features = ["v4", "fast-rng", "macro-diagnostics", "js", "serde"] }
+uuid = { version = "1.6", features = ["v7", "fast-rng", "macro-diagnostics", "js", "serde"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 csv = "1.2"
diff --git a/src/components/plates/destination_plate.rs b/src/components/plates/destination_plate.rs
index e124b94..39acf1f 100644
--- a/src/components/plates/destination_plate.rs
+++ b/src/components/plates/destination_plate.rs
@@ -41,6 +41,14 @@ pub fn DestinationPlate(props: &DestinationPlateProps) -> Html {
     }
     let destination_wells = ct_state.transfer.transfer_region.get_destination_wells();
 
+    let ordered_ids: Vec<uuid::Uuid> = {
+        let mut ids: Vec<uuid::Uuid> = main_state.transfers.clone().iter()
+        .map(|x| x.id)
+        .collect();
+        ids.sort_unstable();
+        ids
+    };
+
     let mouse_callback = {
         let m_start_handle = m_start_handle.clone();
         let m_end_handle = m_end_handle.clone();
@@ -118,7 +126,7 @@ pub fn DestinationPlate(props: &DestinationPlateProps) -> Html {
                 in_transfer={destination_wells.contains(&(i,j))}
                 color={transfer_map.get(&(i,j))
                     .and_then(|t| t.last())
-                    .map(|t| PALETTE.get_uuid(t.get_uuid()))
+                    .map(|t| PALETTE.get_ordered(t.get_uuid(), &ordered_ids))
                 }
                 cell_height={props.cell_height}
                 title={transfer_map.get(&(i,j)).map(|transfers| format!("Used by: {}", transfers.iter().map(|t| t.name.clone())
diff --git a/src/components/plates/source_plate.rs b/src/components/plates/source_plate.rs
index 2c475a6..f533547 100644
--- a/src/components/plates/source_plate.rs
+++ b/src/components/plates/source_plate.rs
@@ -61,6 +61,14 @@ pub fn SourcePlate(props: &SourcePlateProps) -> Html {
 
     let source_wells = ct_state.transfer.transfer_region.get_source_wells();
 
+    let ordered_ids: Vec<uuid::Uuid> = {
+        let mut ids: Vec<uuid::Uuid> = main_state.transfers.clone().iter()
+        .map(|x| x.id)
+        .collect();
+        ids.sort_unstable();
+        ids
+    };
+
     let mouse_callback = {
         let m_start_handle = m_start_handle.clone();
         let m_end_handle = m_end_handle.clone();
@@ -122,7 +130,7 @@ pub fn SourcePlate(props: &SourcePlateProps) -> Html {
                         in_transfer={source_wells.contains(&(i,j))}
                         color={transfer_map.get(&(i,j))
                             .and_then(|t| t.last())
-                            .map(|t| PALETTE.get_uuid(t.get_uuid()))
+                            .map(|t| PALETTE.get_ordered(t.get_uuid(), &ordered_ids))
                         }
                         cell_height={props.cell_height}
                         title={transfer_map.get(&(i,j)).map(|transfers| format!("Used by: {}", transfers.iter().map(|t| t.name.clone())
diff --git a/src/components/plates/util.rs b/src/components/plates/util.rs
index 34abf68..51de79b 100644
--- a/src/components/plates/util.rs
+++ b/src/components/plates/util.rs
@@ -35,10 +35,23 @@ impl ColorPalette {
         self.get((2f64.powi(-(t.ilog2() as i32))) * (t as f64 + 0.5f64) - 1.0f64)
     }
 
-    pub fn get_uuid(&self, t: uuid::Uuid) -> [f64; 3] {
-        // self.get(t.as_u128() as f64 / (u128::MAX) as f64)
-        let mut r = SmallRng::seed_from_u64(t.as_u128() as u64);
-        self.get(r.gen_range(0.0..1.0f64))
+    // pub fn get_uuid(&self, t: uuid::Uuid) -> [f64; 3] {
+    //     // self.get(t.as_u128() as f64 / (u128::MAX) as f64)
+    //     let mut r = SmallRng::seed_from_u64(t.as_u128() as u64);
+    //     self.get(r.gen_range(0.0..1.0f64))
+    // }
+
+    pub fn get_ordered(&self, t: uuid::Uuid, ordered_uuids: &Vec<uuid::Uuid>)
+        -> [f64; 3] {
+        let index = ordered_uuids.iter().position(|&x| x == t).expect("uuid must be in list of uuids") + 1;
+        return self.get(Self::space_evenly(index))
+    }
+
+    fn space_evenly(x: usize) -> f64 {
+        let e: usize = (x.ilog2() + 1) as usize;
+        let d: usize = (2usize.pow(e as u32)) as usize;
+        let n: usize = (2*x + 1) % d;
+        return (n as f64) / (d as f64);
     }
 }
 
diff --git a/src/data/plate_instances.rs b/src/data/plate_instances.rs
index 23599b8..f444c18 100644
--- a/src/data/plate_instances.rs
+++ b/src/data/plate_instances.rs
@@ -5,6 +5,8 @@ use uuid::Uuid;
 #[derive(PartialEq, Clone, Serialize, Deserialize)]
 pub struct PlateInstance {
     pub plate: Plate,
+    #[serde(rename = "id_v7")]
+    #[serde(default = "Uuid::now_v7")]
     id: Uuid,
     pub name: String,
 }
@@ -16,7 +18,7 @@ impl PlateInstance {
                 plate_type: sort,
                 plate_format: format,
             },
-            id: Uuid::new_v4(),
+            id: Uuid::now_v7(),
             name,
         }
     }
@@ -34,7 +36,7 @@ impl From<Plate> for PlateInstance {
     fn from(value: Plate) -> Self {
         PlateInstance {
             plate: value,
-            id: Uuid::new_v4(),
+            id: Uuid::now_v7(),
             name: "New Plate".to_string(),
         }
     }
diff --git a/src/data/transfer.rs b/src/data/transfer.rs
index 541106d..b27868b 100644
--- a/src/data/transfer.rs
+++ b/src/data/transfer.rs
@@ -10,7 +10,9 @@ pub struct Transfer {
     pub source_id: Uuid,
     pub dest_id: Uuid,
     pub name: String,
-    id: Uuid,
+    #[serde(rename = "id_v7")]
+    #[serde(default = "Uuid::now_v7")]
+    pub id: Uuid,
     pub transfer_region: TransferRegion,
     #[serde(default = "default_volume")]
     pub volume: f32,
@@ -44,7 +46,7 @@ impl Transfer {
             source_id: source.get_uuid(),
             dest_id: dest.get_uuid(),
             name,
-            id: Uuid::new_v4(),
+            id: Uuid::now_v7(),
             transfer_region: tr,
             volume: 2.5,
         }