diff --git a/include/ksr/logging.h b/include/ksr/logging.h
index d0a308e..ef7a67d 100644
--- a/include/ksr/logging.h
+++ b/include/ksr/logging.h
@@ -1,11 +1,70 @@
 #pragma once
 
-#define TERMSTYLE_RESET   "\033[0m"
-#define TERMSTYLE_BLACK   "\033[30m"
-#define TERMSTYLE_RED     "\033[31m"
-#define TERMSTYLE_GREEN   "\033[32m"
-#define TERMSTYLE_YELLOW  "\033[33m"
-#define TERMSTYLE_BLUE    "\033[34m"
-#define TERMSTYLE_MAGENTA "\033[35m"
-#define TERMSTYLE_CYAN    "\033[36m"
-#define TERMSTYLE_WHITE   "\033[37m"
+#include <stdio.h>
+
+/*
+ * Logging constants, that can be used to style logs.
+ */
+
+#define TERMSTYLE_RESET            "\033[0m"
+#define TERMSTYLE_DEFAULT_COLOR    "\033[39m"
+
+#define TERMSTYLE_BLACK            "\033[30m"
+#define TERMSTYLE_RED              "\033[31m"
+#define TERMSTYLE_GREEN            "\033[32m"
+#define TERMSTYLE_YELLOW           "\033[33m"
+#define TERMSTYLE_BLUE             "\033[34m"
+#define TERMSTYLE_MAGENTA          "\033[35m"
+#define TERMSTYLE_CYAN             "\033[36m"
+#define TERMSTYLE_WHITE            "\033[37m"
+
+#define TERMSTYLE_BOLD             "\033[1m"
+#define TERMSTYLE_DIM              "\033[2m"
+#define TERMSTYLE_UNDERLINED       "\033[4m"
+#define TERMSTYLE_BLINK            "\033[5m"
+#define TERMSTYLE_INVERTED         "\033[7m"
+#define TERMSTYLE_HIDDEN           "\033[8m"
+
+#define TERMSTYLE_BOLD_RESET       "\033[21m"
+#define TERMSTYLE_DIM_RESET        "\033[22m"
+#define TERMSTYLE_UNDERLINED_RESET "\033[24m"
+#define TERMSTYLE_BLINK_RESET      "\033[25m"
+#define TERMSTYLE_INVERTED_RESET   "\033[27m"
+#define TERMSTYLE_HIDDEN_RESET     "\033[28m"
+
+/*
+ * Default file descriptors for out stream and error stream.
+ */
+
+#define KSRLOG_ERR_STREAM stderr
+#define KSRLOG_OUT_STREAM stdout
+
+
+/**
+ * Create a log string.
+ */
+#define _ksrlog_log_str(label, color, str, padding_str) padding_str color TERMSTYLE_BOLD "[" label "]" TERMSTYLE_BOLD_RESET " " str TERMSTYLE_DEFAULT_COLOR
+
+/**
+ * Log an error.
+ */
+static inline void ksrlog_error(const char *message)
+{
+	fprintf(KSRLOG_ERR_STREAM, _ksrlog_log_str("ERROR", TERMSTYLE_RED, "%s", "  "), message);
+}
+
+/**
+ * Log a warning.
+ */
+static inline void ksrlog_warning(const char *message)
+{
+	fprintf(KSRLOG_ERR_STREAM, _ksrlog_log_str("WARNING", TERMSTYLE_YELLOW, "%s", ""), message);
+}
+
+/**
+ * Log a success.
+ */
+static inline void ksrlog_success(const char *message)
+{
+	fprintf(KSRLOG_OUT_STREAM, _ksrlog_log_str("SUCCESS", TERMSTYLE_GREEN, "%s", ""), message);
+}
diff --git a/meson.build b/meson.build
index 3e54e7f..f6e1d75 100644
--- a/meson.build
+++ b/meson.build
@@ -34,6 +34,7 @@ test_ksrpromises = executable('test_ksrpromises', [ 'tests/ksrpromises.c' ], dep
 test_ksregex = executable('test_ksregex', [ 'tests/ksregex.c' ], dependencies : deps, include_directories : include_dirs, install : false)
 test_ksrstring = executable('test_ksrstring', [ 'tests/ksrstring.c' ], dependencies : deps, include_directories : include_dirs, install : false)
 test_ksrfiles = executable('test_ksrfiles', [ 'tests/ksrfiles.c' ], dependencies : deps, include_directories : include_dirs, install : false)
+test_ksrlogging = executable('test_ksrlogging', [ 'tests/ksrlogging.c' ], dependencies : deps, include_directories : include_dirs, install : false)
 
 # tests.
 test('ksrarrays', test_ksrarrays)
@@ -42,3 +43,4 @@ test('ksrpromises', test_ksrpromises)
 test('ksregex', test_ksregex)
 test('ksrfiles', test_ksrfiles)
 test('ksrstring', test_ksrstring)
+test('ksrlogging', test_ksrlogging)
diff --git a/tests/ksrlogging.c b/tests/ksrlogging.c
new file mode 100644
index 0000000..90aea0a
--- /dev/null
+++ b/tests/ksrlogging.c
@@ -0,0 +1,8 @@
+#include <ksr/logging.h>
+
+int main(void)
+{
+	ksrlog_error("test message.");
+	ksrlog_warning("test message.");
+	ksrlog_success("test message.");
+}