Ink & Paper
Open in tool →Two greys and one ink-blue link color: the palette of a well-set book page.
Color
#151f23
#151f23
hex
#151f23rgb
rgb(21, 31, 35)hsl
hsl(197, 25%, 11%)oklch
oklch(0.231 0.016 224.4)Closest name: Coco’s Black (#1c1c1a)Relative luminance 0.0126
Tints & shades
Harmonies
Contrast
| #151f23 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 16.77:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.25:1 | 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 #151f23 as the background.
Brands using this color
Palettes built around it
Fresh Juice
Open in tool →Orange, mango and mint — a sugar rush; keep the type black so it stays legible under all that color.
Learning App
Open in tool →Green, blue and orange at full saturation: the gamified-learning look, where every color is a reward.
Playground
Open in tool →Orange, blue and green — the colors of playground equipment; loud, cheerful, obviously for kids.
Fonts for this mood
#151f23 reads as cool, muted, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #151f23
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 #151f23 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/151f23-9cb4c4-df4e6b-1f232d-e9f1ef?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