diff --git a/backend/api_test.go b/backend/api_test.go
index 584364b..15e8480 100644
--- a/backend/api_test.go
+++ b/backend/api_test.go
@@ -516,6 +516,7 @@ func TestPutAllowanceById(t *testing.T) {
 		"name":   TestAllowanceName,
 		"target": 5000,
 		"weight": 10,
+		"colour": "#FF5733",
 	}
 	resp := e.POST("/user/1/allowance").WithJSON(requestBody).Expect().Status(201).JSON().Object()
 	allowanceId := int(resp.Value("id").Number().Raw())
@@ -525,6 +526,7 @@ func TestPutAllowanceById(t *testing.T) {
 		"name":   "Updated Allowance",
 		"target": 6000,
 		"weight": 15,
+		"colour": "#3357FF",
 	}
 	e.PUT("/user/1/allowance/" + strconv.Itoa(allowanceId)).WithJSON(updateRequest).Expect().Status(200)
 
@@ -534,6 +536,7 @@ func TestPutAllowanceById(t *testing.T) {
 	result.Value("name").IsEqual("Updated Allowance")
 	result.Value("target").IsEqual(6000)
 	result.Value("weight").IsEqual(15)
+	result.Value("colour").IsEqual("#3357FF")
 }
 
 func TestCompleteTask(t *testing.T) {
diff --git a/backend/db.go b/backend/db.go
index 71bd650..0c58a85 100644
--- a/backend/db.go
+++ b/backend/db.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"errors"
+	"fmt"
 	"log"
 	"math"
 	"time"
@@ -112,12 +113,13 @@ func (db *Db) GetUserAllowanceById(userId int, allowanceId int) (*Allowance, err
 			return nil, err
 		}
 	} else {
-		var target, progress int64
-		err := db.db.Query("select id, name, target, balance, weight from allowances where user_id = ? and id = ?").
+		var target, progress, colour int64
+		err := db.db.Query("select id, name, target, balance, weight, colour from allowances where user_id = ? and id = ?").
 			Bind(userId, allowanceId).
-			ScanSingle(&allowance.ID, &allowance.Name, &target, &progress, &allowance.Weight)
+			ScanSingle(&allowance.ID, &allowance.Name, &target, &progress, &allowance.Weight, &colour)
 		allowance.Target = float64(target) / 100.0
 		allowance.Progress = float64(progress) / 100.0
+		allowance.Colour = fmt.Sprintf("#%06X", colour)
 		if err != nil {
 			return nil, err
 		}
@@ -125,6 +127,23 @@ func (db *Db) GetUserAllowanceById(userId int, allowanceId int) (*Allowance, err
 	return allowance, nil
 }
 
+func ConvertStringToColour(colourStr string) (int, error) {
+	if len(colourStr) == 0 {
+		return 0xFF0000, nil // Default colour if no string is provided
+	}
+	if colourStr[0] == '#' {
+		colourStr = colourStr[1:]
+	}
+	if len(colourStr) != 6 && len(colourStr) != 3 {
+		return 0, errors.New("colour must be a valid hex string")
+	}
+	colour, err := fmt.Sscanf(colourStr, "%x", &colourStr)
+	if err != nil {
+		return 0, fmt.Errorf("invalid colour format: %v", err)
+	}
+	return colour, nil
+}
+
 func (db *Db) CreateAllowance(userId int, allowance *CreateAllowanceRequest) (int, error) {
 	// Check if user exists before attempting to create an allowance
 	exists, err := db.UserExists(userId)
@@ -141,9 +160,15 @@ func (db *Db) CreateAllowance(userId int, allowance *CreateAllowanceRequest) (in
 	}
 	defer tx.MustRollback()
 
+	// Convert string colour to a valid hex format
+	colour, err := ConvertStringToColour(allowance.Colour)
+	if err != nil {
+		return 0, err
+	}
+
 	// Insert the new allowance
-	err = tx.Query("insert into allowances (user_id, name, target, weight) values (?, ?, ?, ?)").
-		Bind(userId, allowance.Name, int(math.Round(allowance.Target*100.0)), allowance.Weight).
+	err = tx.Query("insert into allowances (user_id, name, target, weight, colour) values (?, ?, ?, ?, ?)").
+		Bind(userId, allowance.Name, int(math.Round(allowance.Target*100.0)), allowance.Weight, colour).
 		Exec()
 
 	if err != nil {
@@ -255,9 +280,14 @@ func (db *Db) UpdateAllowance(userId int, allowanceId int, allowance *UpdateAllo
 	}
 	defer tx.MustRollback()
 
+	colour, err := ConvertStringToColour(allowance.Colour)
+	if err != nil {
+		return err
+	}
+
 	target := int(math.Round(allowance.Target * 100.0))
-	err = tx.Query("update allowances set name=?, target=?, weight=? where id = ? and user_id = ?").
-		Bind(allowance.Name, target, allowance.Weight, allowanceId, userId).
+	err = tx.Query("update allowances set name=?, target=?, weight=?, colour=? where id = ? and user_id = ?").
+		Bind(allowance.Name, target, allowance.Weight, allowanceId, userId, colour).
 		Exec()
 	if err != nil {
 		return err
diff --git a/backend/dto.go b/backend/dto.go
index 3b859d1..5773f45 100644
--- a/backend/dto.go
+++ b/backend/dto.go
@@ -36,18 +36,21 @@ type Allowance struct {
 	Target   float64 `json:"target"`
 	Progress float64 `json:"progress"`
 	Weight   float64 `json:"weight"`
+	Colour   string  `json:"colour"`
 }
 
 type CreateAllowanceRequest struct {
 	Name   string  `json:"name"`
 	Target float64 `json:"target"`
 	Weight float64 `json:"weight"`
+	Colour string  `json:"colour"`
 }
 
 type UpdateAllowanceRequest struct {
 	Name   string  `json:"name"`
 	Target float64 `json:"target"`
 	Weight float64 `json:"weight"`
+	Colour string  `json:"colour"`
 }
 
 type BulkUpdateAllowanceRequest struct {
diff --git a/backend/migrations/2_add_colour.sql b/backend/migrations/2_add_colour.sql
new file mode 100644
index 0000000..2381df8
--- /dev/null
+++ b/backend/migrations/2_add_colour.sql
@@ -0,0 +1,2 @@
+alter table allowances
+add column colour integer not null;