Color
#0b5bbc
#0b5bbcrgb(11, 91, 188)hsl(213, 89%, 39%)oklch(0.487 0.168 257.4)Colors that go with #0b5bbc
Charcoal, Crimson and Amber 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 for #0b5bbc: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with #0b5bbc — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Amber #ffbf00
shippedAmber is paired with #0b5bbc in 6 real palettes, including Warner Bros.'s brand system and Wikipedia's brand system, as the accent.
Blue #0000ff
shipped10 real palettes, including Pixar's brand system and Zillow's brand system put Blue beside #0b5bbc, as the accent.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #0b5bbc: 7 real palettes, including Gopro's brand system and Coca-Cola's brand system, as the supporting colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #0b5bbc: 4 real palettes, including Deep Water and Astro's brand system, as the lead colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #0b5bbc: 4 real palettes, including Apple's brand system and Coursera's brand system, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #0b5bbc: 5 real palettes, including Nissan's brand system and Campbell's's brand system, as the supporting colour.
Real palettes that use #0b5bbc
Tints & shades
Harmonies
Contrast
| #0b5bbc as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.49:1 | pass | pass | fail |
|
Aaon black | 3.24:1 | fail | pass | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0b5bbc as the background.
Brands using this color
Fonts for this mood
#0b5bbc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
Point 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.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #0b5bbc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/0b5bbc-9ca9c4-df584e-1f202d-e9f0f1?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