diff --git a/backend/internal/database/models.go b/backend/internal/database/models.go
index 83b3941..b46bdf0 100644
--- a/backend/internal/database/models.go
+++ b/backend/internal/database/models.go
@@ -43,11 +43,11 @@ type Profile struct {
 	ID        int64
 	UserID    int64
 	Name      string
-	Bio       *string
-	AvatarUrl *string
+	Bio       string
+	AvatarUrl string
 	Birthday  pgtype.Timestamp
-	Color     *string
-	ColorGrad *string
+	Color     string
+	ColorGrad string
 }
 
 type ProfileSetting struct {
diff --git a/backend/internal/database/query.sql.go b/backend/internal/database/query.sql.go
index b85e226..f4d80d1 100644
--- a/backend/internal/database/query.sql.go
+++ b/backend/internal/database/query.sql.go
@@ -146,11 +146,11 @@ VALUES ($1, $2, $3, $4, $5, $6, $7) RETURNING id, user_id, name, bio, avatar_url
 type CreateProfileParams struct {
 	UserID    int64
 	Name      string
-	Bio       *string
+	Bio       string
 	Birthday  pgtype.Timestamp
-	AvatarUrl *string
-	Color     *string
-	ColorGrad *string
+	AvatarUrl string
+	Color     string
+	ColorGrad string
 }
 
 func (q *Queries) CreateProfile(ctx context.Context, arg CreateProfileParams) (Profile, error) {
@@ -381,8 +381,8 @@ type GetProfileByUsernameRestrictedRow struct {
 	Birthday           pgtype.Timestamp
 	Bio                *string
 	AvatarUrl          *string
-	Color              *string
-	ColorGrad          *string
+	Color              string
+	ColorGrad          string
 	HideProfileDetails *bool
 }
 
@@ -454,8 +454,8 @@ type GetProfilesRestrictedRow struct {
 	Username           string
 	Name               string
 	AvatarUrl          *string
-	Color              *string
-	ColorGrad          *string
+	Color              string
+	ColorGrad          string
 	HideProfileDetails *bool
 }
 
@@ -1000,11 +1000,11 @@ WHERE username = $1
 type UpdateProfileByUsernameParams struct {
 	Username  string
 	Name      string
-	Bio       *string
+	Bio       string
 	Birthday  pgtype.Timestamp
-	AvatarUrl *string
-	Color     *string
-	ColorGrad *string
+	AvatarUrl string
+	Color     string
+	ColorGrad string
 }
 
 func (q *Queries) UpdateProfileByUsername(ctx context.Context, arg UpdateProfileByUsernameParams) error {
diff --git a/sqlc/schema.sql b/sqlc/schema.sql
index 3881868..0722f13 100644
--- a/sqlc/schema.sql
+++ b/sqlc/schema.sql
@@ -76,11 +76,11 @@ CREATE TABLE IF NOT EXISTS "profiles" (
   id BIGSERIAL PRIMARY KEY,
   user_id BIGINT UNIQUE NOT NULL REFERENCES users(id) ON DELETE CASCADE,
   name VARCHAR(75) NOT NULL,
-  bio VARCHAR(512),
-  avatar_url VARCHAR(255),
+  bio VARCHAR(512) NOT NULL DEFAULT '',
+  avatar_url VARCHAR(255) NOT NULL DEFAULT '',
   birthday TIMESTAMP,
-  color VARCHAR(7),
-  color_grad VARCHAR(7)
+  color VARCHAR(7) NOT NULL DEFAULT '#254333',
+  color_grad VARCHAR(7) NOT NULL DEFAULT '#691E4D'
 );
 
 CREATE TABLE IF NOT EXISTS "profile_settings" (