diff --git a/behaviour.el b/behaviour.el
index ea81c3a..7f88d7d 100644
--- a/behaviour.el
+++ b/behaviour.el
@@ -79,6 +79,10 @@
 (require 'rainbow-delimiters)
 (add-hook 'prog-mode-hook 'rainbow-delimiters-mode)
 
+; Show hex colors as colors
+(require 'rainbow-mode)
+(add-hook 'prog-mode-hook 'rainbow-mode)
+
 ;;; When pasting/writing over a selection, replace it.
 (delete-selection-mode 1)
 
diff --git a/languages.el b/languages.el
index 0caed8c..c9e8d0a 100644
--- a/languages.el
+++ b/languages.el
@@ -35,6 +35,7 @@
   (remove-hook 'elixir-mode-hook 'elixir-mode-config)
   (remove-hook 'emacs-lisp-mode-hook 'elisp-mode-config)
   (remove-hook 'html-mode-hook 'web-mode-config)
+  (remove-hook 'haskell-mode-hook 'haskell-mode-config)
 
   (set-tab-4))
 
@@ -43,7 +44,6 @@
 (add-hook 'rust-mode-hook 'racer-mode)
 (add-hook 'rust-mode-hook 'flycheck-mode)
 
-
 ;;; Elixir
 ;; Note: there is no flycheck support for Elixir yet
 (require 'alchemist)
@@ -53,6 +53,7 @@
   (remove-hook 'rust-mode-hook 'rust-mode-config)
   (remove-hook 'emacs-lisp-mode-hook 'elisp-mode-config)
   (remove-hook 'html-mode-hook 'web-mode-config)
+  (remove-hook 'haskell-mode-hook 'haskell-mode-config)
 
   (set-tab-2))
 
@@ -61,6 +62,21 @@
 (add-hook 'elixir-mode-hook 'alchemist-mode)
 (add-hook 'elixir-mode-hook 'ruby-end-mode)
 
+;;; Haskell
+(defun haskell-mode-config ()
+  "Call haskell mode config."
+  (remove-hook 'ruby-mode-hook 'ruby-mode-config)
+  (remove-hook 'rust-mode-hook 'rust-mode-config)
+  (remove-hook 'emacs-lisp-mode-hook 'elisp-mode-config)
+  (remove-hook 'html-mode-hook 'web-mode-config)
+  (remove-hook 'elixir-mode-hook 'elixir-mode-config)
+
+  (set-tab-4))
+
+(add-hook 'haskell-mode-hook 'haskell-mode-config)
+(add-hook 'haskell-mode-hook 'set-line-80)
+(add-hook 'haskell-mode-hook 'flycheck-mode)
+
 ;;; Elisp
 (defun elisp-mode-config ()
   "Setup editor for Lisp."
@@ -68,6 +84,7 @@
   (remove-hook 'ruby-mode-hook 'ruby-mode-config)
   (remove-hook 'elixir-mode-hook 'elixir-mode-config)
   (remove-hook 'html-mode-hook 'web-mode-config)
+  (remove-hook 'haskell-mode-hook 'haskell-mode-config)
 
   (set-tab-2)
 
diff --git a/packages.el b/packages.el
index 11a93da..116fc78 100644
--- a/packages.el
+++ b/packages.el
@@ -34,6 +34,11 @@
   (package-refresh-contents)
   (package-install 'smart-mode-line))
 
+;; Show hex colors in UI
+(unless (package-installed-p 'rainbow-mode)
+  (package-refresh-contents)
+  (package-install 'rainbow-mode))
+
 ;; Indentation and line length
 (unless (package-installed-p 'indent-guide)
   (package-refresh-contents)
@@ -133,6 +138,10 @@
   (package-refresh-contents)
   (package-install 'helm-themes))
 
+(unless (package-installed-p 'base16-theme)
+  (package-refresh-contents)
+  (package-install 'base16-theme))
+
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Languages and frameworks
 
@@ -175,6 +184,11 @@
   (package-refresh-contents)
   (package-install 'web-mode))
 
+; JSON prettifier
+(unless (package-installed-p 'json-reformat)
+  (package-refresh-contents)
+  (package-install 'json-reformat))
+
 ; Markdown helper
 (unless (package-installed-p 'markdown-mode)
   (package-refresh-contents)
diff --git a/themes.el b/themes.el
index fbb78dd..52cebf7 100644
--- a/themes.el
+++ b/themes.el
@@ -1,9 +1,12 @@
+;;; themes.el -- Summary
+
+;;; Commentary:
+
 ;; (setq airline-helm-colors t)
 ;; (setq airline-cursor-colors t)
 ;; (setq airline-eshell-colors t)
 
-;; Neotree theme
-(setq neo-theme 'arrow)
+;;; Code:
 
 ;; Add mode line icons items
 ;; (mode-icons-mode)
@@ -12,31 +15,40 @@
 (require 'smart-mode-line)
 (setq sml/no-confirm-load-theme t)
 (sml/setup)
-(sml/apply-theme 'dark)
+(sml/apply-theme 'respectful)
 
 ;; Display time on mode line
 (setq display-time-format "%H:%M")
 (display-time-mode t)
 
 ;; (load-theme 'ujelly t t)
-(load-theme 'avk-daylight t t)
-(load-theme 'monokai t t)
+;; (load-theme 'avk-daylight t t)
+;; (load-theme 'monokai t t)
 ;; (load-theme 'flatui t t)
-(load-theme 'atom-one-dark t t)
+;; (load-theme 'atom-one-dark t t)
 (load-theme 'flatui t t)
-(load-theme 'noctilux t t)
-(load-theme 'whiteboard t t)
+;; (load-theme 'noctilux t t)
+;; (load-theme 'whiteboard t t)
+;; (load-theme 'dichromacy t t)
+(load-theme 'base16-harmonic-dark t t)
 
 (require 'helm-themes)
 (if (display-graphic-p)
     (progn
-      (enable-theme 'flatui))
+      (enable-theme 'base16-harmonic-dark)
+      (set-face-attribute 'linum nil :font "Hasklig 14"
+                    :slant 'normal
+                    :background "#0b1c2c"))
   (progn
     (enable-theme 'flatui)))
 
 ;; (color-theme-approximate-on)
-(set-face-attribute 'default nil :font "Hasklig 13")
-(set-face-attribute 'mode-line nil :font "Hasklig 12")
-(set-face-attribute 'linum nil :font "Hasklig 13")
 
-;;; themes.el end here
+;; Set font face
+(set-face-attribute 'default nil :font "Hasklig 13")
+(set-face-attribute 'mode-line nil :font "Hasklig 13")
+(set-face-attribute 'helm-selection nil :font "Hasklig 13")
+(set-face-attribute 'helm-header nil :font "Hasklig 15")
+
+(provide 'themes)
+;;; themes.el ends here