Blueprint
Open in tool →Cyan and indigo on navy is the developer-tool look; amber is the only warm note, so it always reads as 'attention'.
Color
#101523
#101523
hex
#101523rgb
rgb(16, 21, 35)hsl
hsl(224, 37%, 10%)oklch
oklch(0.198 0.029 268.6)Closest name: Corbeau (#111122)Relative luminance 0.0077
Colors that go with #101523
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 #101523 without the hard edge of pure #000.
Amber #ffbf00
shippedAmber is paired with #101523 in 18 real palettes, including Blueprint and Lemon Squeezy's brand system, as the accent.
Blue #0000ff
shipped23 real palettes, including Monzo's brand system and League of Legends's brand system put Blue beside #101523, as the accent.
Blue Violet #8a2be2
shippedBlue Violet is paired with #101523 in 10 real palettes, including Yahoo's brand system and Prepare your taste buds...'s brand system, as the supporting colour.
Blush Pink #e8b4b8
shipped5 real palettes, including Estate and Cartier's brand system put Blush Pink beside #101523, as the accent.
Brown #a52a2a
shipped5 real palettes, including State Farm's brand system and Garnet put Brown beside #101523, as the supporting colour.
Burgundy #800020
shipped4 real palettes, including Qatar Airways's brand system and Mailchimp's brand system put Burgundy beside #101523, as the accent.
Burlywood #deb887
shippedBurlywood is paired with #101523 in 6 real palettes, including Coffee Bar and Velvet, as the accent.
Real palettes that use #101523
Tints & shades
Harmonies
Contrast
| #101523 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 18.2:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.15:1 | 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 #101523 as the background.
Brands using this color
- Monzotext · #091723 · Δ1.201
- Affirmtext · #101820 · Δ1.43
- Chasetext · #101820 · Δ1.43
- League of Legendsprimary · #0a1428 · Δ1.488
- League of Legendstext · #0a1428 · Δ1.488
- MongoDBtext · #061621 · Δ1.622
- Coheresecondary · #14142a · Δ1.723
- Railwaytext · #13111c · Δ1.778
- Warptext · #1a1522 · Δ1.901
- Qatar Airwayssecondary · #181825 · Δ1.93
Palettes built around it
Indigo SaaS
Open in tool →The dependable indigo-and-emerald B2B pairing: indigo for primary actions, emerald reserved for success states.
Slate Workspace
Open in tool →Slate on slate with a single blue — the productivity-app look where the interface disappears behind the work.
Ledger Dark
Open in tool →Gold on midnight is the private-banking cue; the mint accent keeps it from feeling old-money stuffy.
Clinic
Open in tool →Teal reads clinical without the coldness of pure blue; the coral accent adds warmth for reassurance moments.
Cobalt Pop
Open in tool →One deep cobalt and one hot pink on white — a two-accent system for launches and campaign pages that need punch.
Sapphire & Gold
Open in tool →Deep sapphire and gold with a teal — old-money jewel tones on an ivory ground; heraldic without a crest.
Fonts for this mood
#101523 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #101523
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 #101523 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/101523-9ca2c4-df724e-221f2d-e9eff1?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