diff --git a/source/mijin/logging/formatting.hpp b/source/mijin/logging/formatting.hpp
index fe15d32..09df423 100644
--- a/source/mijin/logging/formatting.hpp
+++ b/source/mijin/logging/formatting.hpp
@@ -13,6 +13,7 @@
 #include "../memory/memutil.hpp"
 #include "../memory/virtual_allocator.hpp"
 #include "../util/annot.hpp"
+#include "../util/ansi_colors.hpp"
 #include "../util/concepts.hpp"
 #include "../util/string.hpp"
 
@@ -31,7 +32,7 @@ public:
 
     virtual ~BaseLogFormatter() noexcept = default;
 
-    virtual void format(const LogMessage& message, string_t& outFormatted) noexcept = 0;
+    virtual void format(const LogMessage& message, string_t& outFormatted) = 0;
 };
 
 template<typename TChar = MIJIN_DEFAULT_CHAR_TYPE, typename TTraits = std::char_traits<TChar>,
@@ -44,13 +45,16 @@ public:
     using allocator_t = TAllocator;
     using base_t = BaseLogFormatter<char_t, traits_t, allocator_t>;
     using typename base_t::string_t;
+    using string_view_t = std::basic_string_view<char_t, traits_t>;
 private:
     string_t mFormat;
     string_t mFormatBuffer;
 public:
     explicit BaseSimpleLogFormatter(string_t format) MIJIN_NOEXCEPT : mFormat(std::move(format)), mFormatBuffer(mFormat.get_allocator()) {}
 
-    void format(const LogMessage& message, string_t& outFormatted) noexcept override;
+    void format(const LogMessage& message, string_t& outFormatted) override;
+private:
+    void formatAnsiSequence(const LogMessage& message, string_view_t ansiName, string_t& outFormatted);
 };
 
 #define FORMATTER_SET_ARGS(chr_type) chr_type, std::char_traits<chr_type>, TAllocator
@@ -114,10 +118,8 @@ MIJIN_DEFINE_CHAR_VERSIONS_TMPL(FormattingLogSink, MIJIN_FORMATTING_SINK_COMMON_
 #undef SINK_SET_ARGS
 
 template<typename TChar, typename TTraits, allocator_type_for<TChar> TAllocator>
-void BaseSimpleLogFormatter<TChar, TTraits, TAllocator>::format(const LogMessage& message, string_t& outFormatted) noexcept
+void BaseSimpleLogFormatter<TChar, TTraits, TAllocator>::format(const LogMessage& message, string_t& outFormatted)
 {
-    using string_view_t = std::basic_string_view<char_t, traits_t>;
-
     mFormatBuffer.clear();
     for (auto pos = mFormat.begin(); pos != mFormat.end(); ++pos)
     {
@@ -252,6 +254,10 @@ void BaseSimpleLogFormatter<TChar, TTraits, TAllocator>::format(const LogMessage
             {
                 formatInline(message.level->name);
             }
+            else if (argName == MIJIN_SMART_QUOTE(char_t, "ansi"))
+            {
+                formatAnsiSequence(message, argFormat.substr(1), outFormatted);
+            }
             else
             {
                 MIJIN_ERROR("Invalid format argument name.");
@@ -263,6 +269,56 @@ void BaseSimpleLogFormatter<TChar, TTraits, TAllocator>::format(const LogMessage
         }
     }
 }
+
+template<typename TChar, typename TTraits, allocator_type_for<TChar> TAllocator>
+void BaseSimpleLogFormatter<TChar, TTraits, TAllocator>::formatAnsiSequence(const LogMessage& message, string_view_t ansiName, string_t& outFormatted)
+{
+    std::size_t numParts = 0;
+    const auto formatParts = splitFixed<4>(ansiName, ",", {}, &numParts);
+
+    outFormatted += MIJIN_SMART_QUOTE(char_t, "\033[");
+    for (std::size_t partIdx = 0; partIdx < numParts; ++partIdx)
+    {
+        const string_view_t& part = formatParts[partIdx];
+        if (partIdx > 0)
+        {
+            outFormatted += MIJIN_SMART_QUOTE(char_t, ',');
+        }
+        if (part == MIJIN_SMART_QUOTE(char_t, "reset"))
+        {
+            outFormatted += BaseAnsiFontEffects<char_t>::RESET;
+        }
+        else if (part == MIJIN_SMART_QUOTE(char_t, "level_color"))
+        {
+            const int levelValue = message.level->value;
+            if (levelValue < MIJIN_LOG_LEVEL_VALUE_VERBOSE)
+            {
+                outFormatted += BaseAnsiFontEffects<char_t>::FG_CYAN;
+            }
+            else if (levelValue < MIJIN_LOG_LEVEL_VALUE_INFO)
+            {
+                outFormatted += BaseAnsiFontEffects<char_t>::FG_WHITE;
+            }
+            else if (levelValue < MIJIN_LOG_LEVEL_VALUE_WARNING)
+            {
+                outFormatted += BaseAnsiFontEffects<char_t>::FG_BRIGHT_WHITE;
+            }
+            else if (levelValue < MIJIN_LOG_LEVEL_VALUE_ERROR)
+            {
+                outFormatted += BaseAnsiFontEffects<char_t>::FG_YELLOW;
+            }
+            else
+            {
+                outFormatted += BaseAnsiFontEffects<char_t>::FG_RED;
+            }
+        }
+        else
+        {
+            MIJIN_ERROR("Invalid format ansi font effect name.");
+        }
+    }
+    outFormatted += MIJIN_SMART_QUOTE(char_t, 'm');
+}
 } // namespace mijin
 
 #endif // !defined(MIJIN_LOGGING_FORMATTING_HPP_INCLUDED)
diff --git a/source/mijin/logging/stdio_sink.hpp b/source/mijin/logging/stdio_sink.hpp
index 43739e0..1a76b86 100644
--- a/source/mijin/logging/stdio_sink.hpp
+++ b/source/mijin/logging/stdio_sink.hpp
@@ -11,7 +11,7 @@ namespace mijin
 {
 template<MIJIN_FORMATTING_SINK_TMPL_ARGS_INIT>
     requires(allocator_type<TAllocator<TChar>>)
-class StdioSink : public BaseFormattingLogSink<MIJIN_FORMATTING_SINK_TMP_ARG_NAMES>
+class BaseStdioSink : public BaseFormattingLogSink<MIJIN_FORMATTING_SINK_TMP_ARG_NAMES>
 {
 public:
     using base_t = BaseFormattingLogSink<MIJIN_FORMATTING_SINK_TMP_ARG_NAMES>;
@@ -20,12 +20,18 @@ public:
     using typename base_t::formatter_ptr_t;
     using typename base_t::message_t;
 private:
-    int mMinStderrLevel;
+    int mMinStderrLevel = MIJIN_LOG_LEVEL_VALUE_WARNING;
 public:
-    explicit StdioSink(not_null_t<formatter_ptr_t> formatter, allocator_t allocator = {},
-                       int minStderrLevel = MIJIN_LOG_LEVEL_VALUE_WARNING)
+    explicit BaseStdioSink(not_null_t<formatter_ptr_t> formatter, allocator_t allocator = {})
         MIJIN_NOEXCEPT_IF(std::is_nothrow_move_constructible_v<allocator_t>)
-        : base_t(std::move(formatter), std::move(allocator)), mMinStderrLevel(minStderrLevel) {}
+        : base_t(std::move(formatter), std::move(allocator)) {}
+
+    [[nodiscard]]
+    int getMinStderrLevel() const MIJIN_NOEXCEPT { return mMinStderrLevel; }
+
+    void setMinStderrLevel(int level) MIJIN_NOEXCEPT { mMinStderrLevel = level; }
+
+    void setMinStderrLevel(const BaseLogLevel<char_t>& level) MIJIN_NOEXCEPT { mMinStderrLevel = level.value; }
 
     void handleMessageFormatted(const message_t& message, const char_t* formatted) MIJIN_NOEXCEPT override
     {
@@ -52,6 +58,12 @@ public:
         }
     }
 };
+
+#define SINK_SET_ARGS(chr_type) chr_type, std::char_traits<chr_type>, TAllocator, TDeleter
+
+MIJIN_DEFINE_CHAR_VERSIONS_TMPL(StdioSink, MIJIN_FORMATTING_SINK_COMMON_ARGS, SINK_SET_ARGS)
+
+#undef SINK_SET_ARGS
 } // namespace mijin
 
 
diff --git a/source/mijin/util/ansi_colors.hpp b/source/mijin/util/ansi_colors.hpp
new file mode 100644
index 0000000..6c607dc
--- /dev/null
+++ b/source/mijin/util/ansi_colors.hpp
@@ -0,0 +1,55 @@
+
+#pragma once
+
+#if !defined(MIJIN_UTIL_ANSI_COLORS_HPP_INCLUDED)
+#define MIJIN_UTIL_ANSI_COLORS_HPP_INCLUDED 1
+
+#include "../internal/common.hpp"
+
+namespace mijin
+{
+template<typename TChar = MIJIN_DEFAULT_CHAR_TYPE>
+struct BaseAnsiFontEffects
+{
+    using char_t = TChar;
+
+    static constexpr const char_t* RESET = MIJIN_SMART_QUOTE(char_t, "0");
+
+    static constexpr const char_t* FG_BLACK = MIJIN_SMART_QUOTE(char_t, "30");
+    static constexpr const char_t* FG_RED = MIJIN_SMART_QUOTE(char_t, "31");
+    static constexpr const char_t* FG_GREEN = MIJIN_SMART_QUOTE(char_t, "32");
+    static constexpr const char_t* FG_YELLOW = MIJIN_SMART_QUOTE(char_t, "33");
+    static constexpr const char_t* FG_BLUE = MIJIN_SMART_QUOTE(char_t, "34");
+    static constexpr const char_t* FG_MAGENTA = MIJIN_SMART_QUOTE(char_t, "35");
+    static constexpr const char_t* FG_CYAN = MIJIN_SMART_QUOTE(char_t, "36");
+    static constexpr const char_t* FG_WHITE = MIJIN_SMART_QUOTE(char_t, "37");
+    static constexpr const char_t* FG_BRIGHT_BLACK = MIJIN_SMART_QUOTE(char_t, "90");
+    static constexpr const char_t* FG_BRIGHT_RED = MIJIN_SMART_QUOTE(char_t, "91");
+    static constexpr const char_t* FG_BRIGHT_GREEN = MIJIN_SMART_QUOTE(char_t, "92");
+    static constexpr const char_t* FG_BRIGHT_YELLOW = MIJIN_SMART_QUOTE(char_t, "93");
+    static constexpr const char_t* FG_BRIGHT_BLUE = MIJIN_SMART_QUOTE(char_t, "94");
+    static constexpr const char_t* FG_BRIGHT_MAGENTA = MIJIN_SMART_QUOTE(char_t, "95");
+    static constexpr const char_t* FG_BRIGHT_CYAN = MIJIN_SMART_QUOTE(char_t, "96");
+    static constexpr const char_t* FG_BRIGHT_WHITE = MIJIN_SMART_QUOTE(char_t, "97");
+
+    static constexpr const char_t* BG_BLACK = MIJIN_SMART_QUOTE(char_t, "40");
+    static constexpr const char_t* BG_RED = MIJIN_SMART_QUOTE(char_t, "41");
+    static constexpr const char_t* BG_GREEN = MIJIN_SMART_QUOTE(char_t, "42");
+    static constexpr const char_t* BG_YELLOW = MIJIN_SMART_QUOTE(char_t, "43");
+    static constexpr const char_t* BG_BLUE = MIJIN_SMART_QUOTE(char_t, "44");
+    static constexpr const char_t* BG_MAGENTA = MIJIN_SMART_QUOTE(char_t, "45");
+    static constexpr const char_t* BG_CYAN = MIJIN_SMART_QUOTE(char_t, "46");
+    static constexpr const char_t* BG_WHITE = MIJIN_SMART_QUOTE(char_t, "47");
+    static constexpr const char_t* BG_BRIGHT_BLACK = MIJIN_SMART_QUOTE(char_t, "100");
+    static constexpr const char_t* BG_BRIGHT_RED = MIJIN_SMART_QUOTE(char_t, "101");
+    static constexpr const char_t* BG_BRIGHT_GREEN = MIJIN_SMART_QUOTE(char_t, "102");
+    static constexpr const char_t* BG_BRIGHT_YELLOW = MIJIN_SMART_QUOTE(char_t, "103");
+    static constexpr const char_t* BG_BRIGHT_BLUE = MIJIN_SMART_QUOTE(char_t, "104");
+    static constexpr const char_t* BG_BRIGHT_MAGENTA = MIJIN_SMART_QUOTE(char_t, "105");
+    static constexpr const char_t* BG_BRIGHT_CYAN = MIJIN_SMART_QUOTE(char_t, "106");
+    static constexpr const char_t* BG_BRIGHT_WHITE = MIJIN_SMART_QUOTE(char_t, "107");
+};
+MIJIN_DEFINE_CHAR_VERSIONS(AnsiFontEffects)
+}
+
+#endif // !defined(MIJIN_UTIL_ANSI_COLORS_HPP_INCLUDED)