Ink & Paper
Open in tool →Two greys and one ink-blue link color: the palette of a well-set book page.
Color
#151d23
#151d23
hex
#151d23rgb
rgb(21, 29, 35)hsl
hsl(206, 25%, 11%)oklch
oklch(0.226 0.017 240.9)Closest name: Coco’s Black (#1c1c1a)Relative luminance 0.0116
Colors that go with #151d23
Charcoal, Amber and Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Charcoal #36454f
neutralshippedCharcoal is the text near-black that reads cleanly against #151d23 without the hard edge of pure #000.
Amber #ffbf00
shippedAmber is paired with #151d23 in 15 real palettes, including Warner Bros.'s brand system and Wikipedia's brand system, as the accent.
Blue #0000ff
shipped23 real palettes, including Signal's brand system and CVS's brand system put Blue beside #151d23, as the supporting colour.
Blue Violet #8a2be2
shippedBlue Violet is paired with #151d23 in 10 real palettes, including Yahoo's brand system and ClickUp's brand system, as the supporting colour.
Blush Pink #e8b4b8
shipped5 real palettes, including Graphite Mono and Estate put Blush Pink beside #151d23, as the accent.
Brown #a52a2a
shipped5 real palettes, including Woodsmoke and State Farm's brand system put Brown beside #151d23, as the accent.
Burlywood #deb887
shippedBurlywood is paired with #151d23 in 6 real palettes, including Coffee Bar and Kiln, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #151d23: 10 real palettes, including Diner and Alpine, as the supporting colour.
Real palettes that use #151d23
Tints & shades
Harmonies
Contrast
| #151d23 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 17.05:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.23:1 | 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 #151d23 as the background.
Brands using this color
- Audisecondary · #181d25 · Δ0.672
- Boxtext · #151f26 · Δ0.803
- Airtableaccent · #181d26 · Δ0.819
- Asanasecondary · #151b26 · Δ1.089
- Vimeotext · #141a20 · Δ1.148
- Fitbitprimary · #191c1d · Δ1.224
- Fitbittext · #191c1d · Δ1.224
- WhatsAppprimary · #1c1e21 · Δ1.359
- WhatsApptext · #1c1e21 · Δ1.359
- Formula 1text · #1c1c25 · Δ1.366
- Splinetext · #191a1d · Δ1.402
- NFLaccent · #172029 · Δ1.462
- Netlifytext · #181a1c · Δ1.48
- Philipsprimary · #15191e · Δ1.53
- Philipstext · #15191e · Δ1.53
- Braveprimary · #1c1c1d · Δ1.534
- Bravetext · #1c1c1d · Δ1.534
- N26text · #1b1b1b · Δ1.694
- Signalprimary · #1b1b1b · Δ1.694
- Signaltext · #1b1b1b · Δ1.694
- JetBrainstext · #19191c · Δ1.706
- Hingetext · #1a1a1a · Δ1.833
- Warner Bros.primary · #1a1a1a · Δ1.833
- Warner Bros.text · #1a1a1a · Δ1.833
- Figmatext · #1e1e1e · Δ1.906
- Gustoprimary · #1c1b1a · Δ1.923
- Gustotext · #1c1b1a · Δ1.923
- CVSprimary · #1a1a19 · Δ1.976
- CVStext · #1a1a19 · Δ1.976
Palettes built around it
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.
Studio Grey
Open in tool →A pure greyscale with a single electric blue — the portfolio palette that makes work look considered.
Diner
Open in tool →Cherry red, mint-teal and butter yellow — chrome-and-vinyl retro; the red does the work, the teal cools it.
Fireside
Open in tool →Cranberry, pine and brass on a charcoal night — the holiday palette without the clichés, because the surface is cold.
Fonts for this mood
#151d23 reads as cool, muted, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #151d23
live endpointPoint any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #151d23 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/151d23-9caec4-df4e56-1f212d-e9f1f1?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