Dr. Hitaishi V's Blog

imli.nvim: A Warm Colorscheme for Neovim

Wed, 07 Oct 2026 00:00:00 GMT

If you have spent any time in the Neovim community, you know the cycle. You install a colorscheme, it looks great for a day, and then something feels off. The comments are too loud. The active tab looks exactly like the inactive ones. The light theme is an afterthought. So you install another one. And another. I have been through this loop more times than I can count, and every time I end up tweaking someone else's colorscheme until it is barely theirs anymore. So I finally did what every Neovim user threatens to do at some point. I made my own. It is called **imli.nvim**, a warm, ember-and-coffee colorscheme for Neovim with both a dark and a light variant. ## Why "warm"? Most dark themes live in the blue-gray space. They are fine. They are also everywhere. I wanted something that felt like a desk lamp at midnight rather than a server room at 3 AM. So the dark variant sits on a deep blue-black base (`#0b1418`) with warm foreground tones (`#e8e0d4`), and the accent colors are ember oranges, coffee browns, and muted golds. The light variant is the same idea with light and dark swapped: a cream-paper background (`#e7dfd2`) with warm ink (`#4a4238`). The goal was simple: something easy on the eyes during long writing and coding sessions, with enough contrast that I am not squinting at my own code at 2 AM. ## What is inside - **Two hand-tuned variants.** Dark and light, switchable with `vim.o.background` - **Treesitter-first.** Full coverage for the common captures, plus LSP semantic token overrides where they matter - **UI consistency.** Statusline, tabline, popups, diagnostics, which-key, mini.icons, and render-markdown all get explicit colors - **A proper tabline.** The active tab gets a distinct background (`#132631`) so you always know where you are. This was the last fix before release, and honestly it should have been the first thing I checked - **Configurable comments.** Adjust comment opacity and italics to taste (`comment_opacity` from 0.1 to 1.0) - **Per-filetype overrides.** Winhighlight-based, so no glitches - **Terminal colors.** All 16 slots match the palette ## Installing it The colorscheme needs Neovim 0.9+ (it uses `nvim_set_hl`). If you are on 0.12+, you can use the new native `vim.pack` package manager. No plugin manager required: ```lua vim.pack.add("https://github.com/hitaishi2222/imli-nvim") require("imli").setup() vim.cmd("colorscheme imli") ``` That is it. It clones on first use, tracks everything in a lockfile, and you can update later with `vim.pack.update()`. If you are on lazy.nvim: ```lua { "hitaishi2222/imli-nvim", lazy = false, priority = 1000, config = function() require("imli").setup() vim.cmd("colorscheme imli") end, } ``` It also works with packer.nvim and vim-plug. Full instructions, the complete palette tables, and a banner image are in the [README](https://github.com/hitaishi2222/imli-nvim). ## Configuration Everything is optional. The defaults are: ```lua require("imli").setup({ italic_comments = true, -- italicize comments comment_opacity = 1.0, -- 0.1 (barely visible) .. 1.0 (full color) filetypes = nil, -- nil = built-in python/lua overrides }) ``` If the comments are too loud for you, drop `comment_opacity` to something like 0.7. If you want them italic, keep `italic_comments = true`. If you want your own per-filetype overrides, pass a table to `filetypes`. The format is documented in the README. ## Why I released it Honestly? Because I was tired of maintaining a fork of someone else's colorsheme in my dotfiles. Every update was a small negotiation. This way, the source of truth is the repo, the lockfile pins the version, and I can update with one command. But also because I think a colorscheme is one of the most personal parts of a developer's setup. It is the thing you look at for hours every day. If mine makes even one person's late-night coding session a little warmer, that is enough for me. It is open source (MIT), it is on GitHub, and issues and pull requests are welcome. If something looks off in your favorite filetype, tell me. That is how these things get better. Happy hacking.

Hello Typst: Math-Heavy Posts, Natively

Wed, 20 Aug 2025 00:00:00 GMT

Why Typst?

LaTeX is a 40-year-old toolchain held together by duct tape and prayer. Typst compiles in milliseconds, has sane syntax, and its math notation is actually readable. This entire post is a .typ file compiled to HTML at build time.

The dispersion relation

For a chalcogenide waveguide, the propagation constant expands as:

𝛽 (𝜔) = 𝛽_{0} + 𝛽_{1} (𝜔 - 𝜔_{0}) + \frac{𝛽_{2}}{2} {(𝜔 - 𝜔_{0})}^{2} + \dots

where $𝛽_{2} = d^{2} \frac{𝛽}{d} 𝜔^{2} |_{𝜔_{0}}$ is the group-velocity dispersion parameter, usually quoted in ps^2/m.

Generalized nonlinear Schrödinger equation

Supercontinuum evolution obeys (broken across lines for readability):

\begin{aligned} \frac{d 𝐴}{d 𝑧} & = 𝑖 \sum_{𝑘 \geq 2} \frac{𝑖^{𝑘 + 1} 𝛽_{𝑘}}{𝑘!} \frac{d^{𝑘} 𝐴}{d 𝑇^{𝑘}} \\ + 𝑖 𝛾 (1 + \frac{𝑖}{𝜔_{0}} \frac{d}{d 𝑇}) 𝐴 (𝑧, 𝑇) \int_{- \infty}^{\infty} 𝑅 (𝑇^{'}) | 𝐴 (𝑇 - 𝑇^{'}) |^{2} d 𝑇^{'} \end{aligned}

Yes, that fits on one line. Try that in Word.

A quick table

Material	$𝛽_{2}$ @ 1550 nm	Nonlinear index $𝑛_{2}$
SiO₂	+0.026 ps^2/m	$2.6 \times 10^{- 20}$ m^2/W
As₂S₃	−0.010 ps^2/m	$3.0 \times 10^{- 18}$ m^2/W
As₂Se₃	−0.049 ps^2/m	$1.2 \times 10^{- 17}$ m^2/W

And code blocks work too

import numpy as np

def gvd(beta2: float, L: float) -> float:
    """Accumulated GVD over length L."""
    return beta2 * L

Closing thought

Expect more equation-dense posts in this format. The markdown pipeline isn’t going anywhere. Now there are simply two ways to write here.

Equations, aligned and numbered

Typst aligns on & without any extra environment. Pair that with #set math.equation(numbering: ...) and display equations come out numbered like everything else:

𝑃_{out} = \int_{0}^{𝐿} 𝑃_{in} 𝑒^{- 𝛼 𝑧} d 𝑧

\begin{aligned} 𝛽_{2} & = d^{2} \frac{𝛽}{d} 𝜔^{2} |_{𝜔_{0}} \\ 𝛽_{3} & = d^{3} \frac{𝛽}{d} 𝜔^{3} |_{𝜔_{0}} \end{aligned}

Figures with captions

Figures get numbered and captioned natively:

Figure 1: A placeholder panel — swap in a real plot with #figure(image("gvd.png")).

Refer back to them as Fig. 1 in running text.

Is AI gonna replace you?

Thu, 01 Aug 2024 00:00:00 GMT

First, is it a question or a concern? If this is a concern to you, you have come to the right place. As we are the so called 'smartest' animal on the planet, we tend to move fast towards the innovation of new technology and research. But whenever a major change in the technology comes to existence, and it feels like making home in our life, small kind of rejection is inbuilt in human nature. It happened when Nicolaus Copernicus told "earth is not at the center of universe, we revolve around a star called sun". Some tried to kill him too, but the truth is always true. The AI is going to stay whether you like it or not. We have to accept and think how we can utilize it towards including new technologies with our daily life. The world is not going to wait until you adopt. So, this is the thing. Either we have to adapt to the technology that we are building and improve the skills needed to survive where any technology can't replace you. As all the big minds say "It's not all about the work, it's just a skill issue". We need to do certain things to understand how these AI works and incorporate with your daily works can make your life a lot easier (sometimes). Research about specific technology, it might not be an AI, it can be anything that helps in automate your work, give your efforts to learn it. Be special in what you do and, show that you have something that others don't. Then you gave no option to not accept you in any area you want to go. Things that we have to do or should be aware of when it comes to AI are: 1. Keep your mind open to try out new things even when whatever you are doing works fine. 2. Explore how new technologies can help you in easing out things in your daily routine. 3. Aware of the current situation of the area you are working and what it takes to climb the ladder. 4. Try to reduce the friction in the work. Either by not procrastinating, or by making use of tools/software that makes your workflow better. I cannot emphasize the changes when I switched from windows to Linux. It impacted a lot in my personal workflow in speed and efficiency. I am faster than ever before and becoming faster as time goes. I have been trying out new AI models locally through ollama (because I don't want to pay a lot of money and my data to companies). It has been quite nice to include these AI models in my workflow. We can use it as a code generator inside a code editor like Copilot. It is definitely better than using old Tabnine (now they also integrated with AI) for code completion and generation. Finally, the verdict is simple, ADOPT. Who knows we might end up like cyberpunk world.

Self-Hosting

Sat, 01 Jun 2024 00:00:00 GMT

I always thought, I need a website. There was no time to create it between my research and other learning activities. I knew little bit of HTML, CSS and Python languages. So, this all website self-hosting came with the idea when I needed a server to store my data from my research, my dad's accounting database, my brother's medical notes and my girlfriend's photos (we all have been there right). So, this is the time of me completed 3 years of PhD, sitting in home planning to write thesis with some research undergoing. For a year or so, I am really into opensource and Linux platforms because of increase in all subscription costs and increase in paid software. I don't like boundaries when I use a software. Some features shouldn't be under a paywall. So, I converted. I made a pledge to use Linux as much as I can. I can't let-go of windows because of some particular software which only run on windows x86 platform that are related to my research. This Linux saga helped me to be a productive researcher. I started using self hosted AI's through Ollama, and started using Arch Linux (b.t.w 😉) on my home machine. I really wanted that option to run local AI's on my laptop to use Fabric for my research and daily reads. I could have easily SSH into my machine locally to use it. But what's fun in that. That would be easy. I wanted to access through internet. So finally after long consideration of a day or so, I went and bought a domain on my name. I think, this will lead to endless possibilities for me to explore more and learn complicated things. These are the things which keeps me going. Blogging is also new to me. I have never wrote a line on a personal diary. All new things… Let's hope this will last long.