Newsprint
Open in tool →Ink-black on warm paper with a single red — the broadsheet hierarchy that lets typography lead.
Brand color
GitHub Black
#181717
hex
#181717rgb
rgb(24, 23, 23)hsl
hsl(0, 2%, 9%)oklch
oklch(0.206 0.002 17.3)From GitHub brand colorsRelative luminance 0.0087
GitHub Black on this page is the real value, not a screenshot: exact hex, RGB, HSL and OKLCH, ten tints and ten shades, classic harmonies, and WCAG contrast with fixes — plus the 13 public brands that use it and the palettes it appears in.
Tints & shades
Harmonies
Contrast
| GitHub Black as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 17.89:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.17:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with GitHub Black as the background.
Brands using this color
- GitHubprimary · #181717
- Next.jstext · #171717 · Δ0.195
- Airtabletext · #161616 · Δ0.579
- CircleCItext · #161616 · Δ0.579
- Notionprimary · #191919 · Δ0.782
- Retooltext · #151515 · Δ1.016
- JetBrainstext · #19191c · Δ1.081
- Netlifytext · #181a1c · Δ1.233
- Splinetext · #191a1d · Δ1.391
- Runwayprimary · #141414 · Δ1.46
- Anthropictext · #141413 · Δ1.514
- N26text · #1b1b1b · Δ1.644
- Vimeotext · #141a20 · Δ1.816
Palettes built around it
Gallery
Open in tool →Near-monochrome with one burnt-orange highlight — an art director's default because it never competes with the work.
Ink & Paper
Open in tool →Two greys and one ink-blue link color: the palette of a well-set book page.
Console Light
Open in tool →A sober docs palette: one blue for interactive, one green for success, zinc greys for everything else.
Graphite
Open in tool →A greyscale system with a single amber — the accent does all the work, so allow one per screen.
Launch Orange
Open in tool →Orange is the rarest SaaS primary, which is exactly why it stands out on a pricing page; cyan keeps it from feeling like a hardware store.
Coffee Bar
Open in tool →Espresso and caramel: a dark-roast palette that photographs latte art beautifully.
Atelier
Open in tool →Black on bone with a whisper of gold: the runway default that lets garments carry the color.
Studio Grey
Open in tool →A pure greyscale with a single electric blue — the portfolio palette that makes work look considered.
Fonts for this mood
GitHub Black reads as neutral, dark, luxury. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around GitHub Black
live endpointPoint any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #181717 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/181717-a2beb0-c859d4-1f2d2b-eaf1e9?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md