diff --git a/src/base/type_system/kt_functions.c b/src/base/type_system/kt_functions.c
index b4780c9..f066c75 100644
--- a/src/base/type_system/kt_functions.c
+++ b/src/base/type_system/kt_functions.c
@@ -16,7 +16,30 @@ kt_define(u32, NULL, __toString_u32);
 kt_define(i64, NULL, __toString_i64);
 kt_define(u64, NULL, __toString_u64);
 
-kt_define(ktDescriptor, NULL, NULL);
+
+char* ktDescriptor_toString(ktDescriptor* d){
+    const char* n="null";
+    char *s0 = toString_u64(d->id, 0,0);
+    char *s1 = toString_u64(d->size, 0,0);
+    char *s2 = d->toString ? toString_hex(d->toString, sizeof(void*), 0,1,0) : n;
+    char *s3 = d->freeMembers ? toString_hex(d->freeMembers, sizeof(void*), 0,1,0) : n;
+    char *rez=cptr_concat("ktDescriptor {"
+        " name:", d->name,
+        " id:",s0,
+        " size:",s1,
+        " toString:",s2,
+        " freeMembers:",s3,
+        " }");
+    free(s0);
+    free(s1);
+    if(s2!=n) free(s2);
+    if(s3!=n) free(s3);
+    return rez;
+}
+
+char* _ktDescriptor_toString(void* _d, u32 fmt) { return ktDescriptor_toString(_d); }
+
+kt_define(ktDescriptor, NULL, _ktDescriptor_toString);
 
 typedef ktDescriptor* ktDescriptor_Ptr;
 
diff --git a/src/base/type_system/kt_functions.h b/src/base/type_system/kt_functions.h
index b131ce2..435e28f 100644
--- a/src/base/type_system/kt_functions.h
+++ b/src/base/type_system/kt_functions.h
@@ -23,6 +23,8 @@ void kt_endInit();
 /// @param id id of registered type
 ktDescriptor* ktDescriptor_get(ktid id);
 
+char* ktDescriptor_toString(ktDescriptor* d);
+
 // call it to free heap-allocated ktDescriptors array
 void kt_free();
 
diff --git a/src/kprint/kprint.c b/src/kprint/kprint.c
index f90af51..86161ba 100644
--- a/src/kprint/kprint.c
+++ b/src/kprint/kprint.c
@@ -179,3 +179,33 @@ void kprint_setColor(kp_fmt f){
     StringBuilder_append_char(strb, ' ');
     StringBuilder_append_char(strb, ']');
 } */
+
+static const char* _kp_colorNames[16]={
+    "black",
+    "dark_red",
+    "dark_green",
+    "dark_yellow",
+    "dark_blue",
+    "dark_magenta",
+    "dark_cyan",
+    "gray",
+    "dark_gray",
+    "red",
+    "green",
+    "yellow",
+    "blue",
+    "magenta",
+    "cyan",
+    "white"
+};
+
+char* kp_bgColor_toString(kp_fmt c){
+    u32 color_index=(c&0x00f00000)>>20;
+    if(color_index>15) throw(ERR_WRONGINDEX);
+    return _kp_colorNames[color_index];
+}
+char* kp_fgColor_toString(kp_fmt c){
+    u32 color_index=(c&0x00f00000)>>24;
+    if(color_index>15) throw(ERR_WRONGINDEX);
+    return _kp_colorNames[color_index];
+}
diff --git a/src/kprint/kprint_colors.h b/src/kprint/kprint_colors.h
index 18c42b8..5131651 100644
--- a/src/kprint/kprint_colors.h
+++ b/src/kprint/kprint_colors.h
@@ -81,6 +81,9 @@ PACKED_ENUM(kp_bgColor,
     kp_bgWhite   = 0x40f00000
 )
 
+char* kp_bgColor_toString(kp_bgColor c);
+char* kp_fgColor_toString(kp_fgColor c);
+
 #if __cplusplus
 }
 #endif
\ No newline at end of file