Palettes / Colors / #0643BB

#0643BB — Vivid Blue

#0643BB is a blue color we call Vivid Blue, closest to the named color RoyalBlue (#4169E1). It belongs to the blue family.

Color name

Closest CSS keyword: royalblue (#4169E1) — not an exact match. CSS royalblue gives you #4169E1, a different color; use #0643BB when you need this exact shade.

Sources: common names follow widely used color-name references; CSS keywords and their hex values follow the CSS Color specification.

#0643BB is a cool blue color associated with trust, calm and professionalism. It is saturated enough to be the accent — buttons, highlights and calls to action — while neutrals do the quiet work around it.

Its strongest partner is its complement #BC7F06; it also sits naturally between #069EBC and #2406BC. In the palettes below you can see it working alongside real color combinations from our collection.

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Color values

RGB & CMYK percentages

Red 2% · Green 26% · Blue 73%

Cyan 97% · Magenta 64% · Yellow 0% · Key 27%

CMYK values are unprofiled approximations for screen reference — not a print-proofing guarantee.

Previews

CSS code for #0643BB

.text { color: #0643BB; }
.background { background-color: #0643BB; }
.border { border: 3px solid #0643BB; }
.text-rgb { color: rgb(6, 67, 187); }
.text-hsl { color: hsl(220, 94%, 38%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #0643BB; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(6, 67, 187, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #0643BB; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(6, 67, 187, 0.8); }

HTML: <p style="color:#0643BB">Text here</p> · <div style="background-color:#0643BB">Div content here</div>

Shades of #0643BB

Tints of #0643BB

Tones of #0643BB

Color harmonies

Complementary — #BC7F06:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #0643BB: #FFFFFF.

Semi-transparent (opacity) text on #0643BB

Text set with opacity blends into the background, so its real contrast is lower than the solid ratios above. Choose a text color and an opacity to see the blended color and its true ratio:

How #0643BB looks with color blindness

Simulated with standard Machado color-vision-deficiency matrices — useful when this color carries meaning in charts, maps or interfaces:

Closest design-system colors

The nearest matches in the Tailwind CSS, Material Design and Bootstrap palettes — handy when you need a framework class instead of a raw hex:

Palettes with a similar color

These palettes use a close neighbour of #0643BB rather than the exact color:

Similar colors

The closest colors that actually appear in our palette collection — click any to open its page:

Browse neighbouring colors

← #0643BA  ·  #0643BC →

Frequently asked questions

What color is #0643BB?

#0643BB is Vivid Blue, a blue color (RGB 6, 67, 187). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #0643BB?

#0643BB is RGB 6, 67, 187 — HSL 220°, 94%, 38% — CMYK 97%, 64%, 0%, 27%.

What colors go with #0643BB?

Its complement is #BC7F06; analogous partners are #069EBC and #2406BC. It also appears in 6+ palettes in our collection.

Can I use #0643BB for text?

White text on #0643BB has a contrast ratio of 8.31:1 (passes WCAG AA); black text gives 2.53:1.