Named color
C64 Blue
#003affrgb(0, 58, 255)hsl(226, 100%, 50%)oklch(0.493 0.286 264)C64 Blue on this page is the real value, not a screenshot: exact hex, RGB, HSL and OKLCH, ten tints and ten shades, classic harmonies, and WCAG contrast with fixes — plus the 1 public brand that uses it and the palettes it appears in.
Colors that go with C64 Blue
Charcoal, Crimson and Cobalt 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 for C64 Blue: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with C64 Blue — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with C64 Blue: 11 real palettes, including Zillow's brand system and NHL's brand system, as the supporting colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with C64 Blue: 7 real palettes, including Qualcomm's brand system and Canva's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with C64 Blue: 7 real palettes, including Pixar's brand system and Dairy Queen's brand system, as the supporting colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with C64 Blue: 9 real palettes, including Unity's brand system and Cargo's brand system, as the lead colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with C64 Blue: 4 real palettes, including Bose's brand system and 3M's brand system, as the accent.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with C64 Blue in 6 real palettes, including Unity's brand system and Spotify's brand system, as the accent.
Real palettes that use C64 Blue
Tints & shades
Harmonies
Contrast
| C64 Blue as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.89:1 | pass | pass | fail |
|
Aaon black | 3.05:1 | 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 C64 Blue as the background.
Brands using this color
Fonts for this mood
C64 Blue 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 #003aff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/003aff-9ca1c4-df774e-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