Tabloid
Open in tool →Red, black and yellow on white is the loudest three-color system in print — use it when headlines are the product.
Color
#18100b
#18100b
hex
#18100brgb
rgb(24, 16, 11)hsl
hsl(23, 37%, 7%)oklch
oklch(0.182 0.017 53.4)Closest name: Sinister (#12110e)Relative luminance 0.0059
Tints & shades
Harmonies
Contrast
| #18100b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 18.79:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.12:1 | 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 #18100b as the background.
Brands using this color
- American Expresstext · #111111 · Δ1.727
- Behancetext · #111111 · Δ1.727
- Calmtext · #111111 · Δ1.727
- Intercomtext · #111111 · Δ1.727
- Klarna UStext · #111111 · Δ1.727
- Mirotext · #111111 · Δ1.727
- Paddletext · #111111 · Δ1.727
- PayPaltext · #111111 · Δ1.727
- Plaidtext · #111111 · Δ1.727
- PostHogtext · #111111 · Δ1.727
- Reddittext · #111111 · Δ1.727
- Remixtext · #111111 · Δ1.727
- Replittext · #111111 · Δ1.727
- Verceltext · #111111 · Δ1.727
- Anthropictext · #141413 · Δ1.807
- Robinhoodtext · #110e08 · Δ1.873
- Runwayprimary · #141414 · Δ1.923
Palettes built around it
Atelier
Open in tool →Black on bone with a whisper of gold: the runway default that lets garments carry the color.
Ember
Open in tool →Flame orange on charcoal — the sports and energy palette; one accent yellow for stats and highlights.
Fonts for this mood
#18100b reads as warm, dark, luxury. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #18100b
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 #18100b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/18100b-c4b09c-62cbc0-2d2b1f-f1e9ea?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