Ink & Paper
Open in tool →Two greys and one ink-blue link color: the palette of a well-set book page.
Color
#151c23
#151c23
hex
#151c23rgb
rgb(21, 28, 35)hsl
hsl(210, 25%, 11%)oklch
oklch(0.223 0.017 248.6)Closest name: Night Demons (#201b20)Relative luminance 0.0111
Colors that go with #151c23
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 #151c23 without the hard edge of pure #000.
Amber #ffbf00
shippedAmber is paired with #151c23 in 18 real palettes, including Warner Bros.'s brand system and Google's brand system, as the accent.
Blue #0000ff
shipped25 real palettes, including Signal's brand system and CVS's brand system put Blue beside #151c23, as the supporting colour.
Blue Violet #8a2be2
shippedBlue Violet is paired with #151c23 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 #151c23, as the accent.
Brown #a52a2a
shipped5 real palettes, including Woodsmoke and State Farm's brand system put Brown beside #151c23, as the accent.
Burgundy #800020
shipped4 real palettes, including Qatar Airways's brand system and Mailchimp's brand system put Burgundy beside #151c23, as the accent.
Burlywood #deb887
shippedBurlywood is paired with #151c23 in 6 real palettes, including Coffee Bar and Kiln, as the accent.
Real palettes that use #151c23
Tints & shades
Harmonies
Contrast
| #151c23 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 17.18:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.22:1 | 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 #151c23 as the background.
Brands using this color
- Audisecondary · #181d25 · Δ0.743
- Asanasecondary · #151b26 · Δ0.798
- Airtableaccent · #181d26 · Δ0.852
- Vimeotext · #141a20 · Δ0.857
- Boxtext · #151f26 · Δ1.099
- Philipsprimary · #15191e · Δ1.26
- Philipstext · #15191e · Δ1.26
- Splinetext · #191a1d · Δ1.277
- Fitbitprimary · #191c1d · Δ1.314
- Fitbittext · #191c1d · Δ1.314
- Formula 1text · #1c1c25 · Δ1.333
- Netlifytext · #181a1c · Δ1.373
- JetBrainstext · #19191c · Δ1.532
- WhatsAppprimary · #1c1e21 · Δ1.58
- WhatsApptext · #1c1e21 · Δ1.58
- Braveprimary · #1c1c1d · Δ1.629
- Bravetext · #1c1c1d · Δ1.629
- Qatar Airwayssecondary · #181825 · Δ1.677
- NFLaccent · #172029 · Δ1.696
- Logitechprimary · #1b1b1b · Δ1.723
- Logitechtext · #1b1b1b · Δ1.723
- N26text · #1b1b1b · Δ1.723
- NASAtext · #1b1b1b · Δ1.723
- Signalprimary · #1b1b1b · Δ1.723
- Signaltext · #1b1b1b · Δ1.723
- Affirmtext · #101820 · Δ1.79
- Chasetext · #101820 · Δ1.79
- Hingetext · #1a1a1a · Δ1.791
- Louis Vuittonprimary · #1a1a1a · Δ1.791
- Louis Vuittontext · #1a1a1a · Δ1.791
- Spectrumprimary · #1a1a1a · Δ1.791
- Spectrumtext · #1a1a1a · Δ1.791
- Warner Bros.primary · #1a1a1a · Δ1.791
- Warner Bros.text · #1a1a1a · Δ1.791
- Nokiatext · #1d1e20 · Δ1.798
- CVSprimary · #1a1a19 · Δ1.951
- CVStext · #1a1a19 · Δ1.951
- Huaweitext · #191919 · Δ1.956
- Notionprimary · #191919 · Δ1.956
- Pumaprimary · #191919 · Δ1.956
- Pumatext · #191919 · Δ1.956
- Gustoprimary · #1c1b1a · Δ1.969
- Gustotext · #1c1b1a · Δ1.969
- Characterprimary · #11181c · Δ1.975
- Charactertext · #11181c · Δ1.975
- Yahooprimary · #1a1919 · Δ1.998
- Yahootext · #1a1919 · Δ1.998
Palettes built around it
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.
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.
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
#151c23 reads as cool, muted, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #151c23
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 #151c23 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/151c23-9cabc4-df514e-1f202d-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