Palettes / Colors / #300CCF

#300CCF — Vivid Blue

#300CCF is a blue color we call Vivid Blue, closest to the named color Blue (#0000FF). It belongs to the blue family.

Color name

Closest CSS keyword: blue (#0000FF) — not an exact match. CSS blue gives you #0000FF, a different color; use #300CCF 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.

#300CCF 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 #ABCF0C; it also sits naturally between #0C4ACF and #910CCF. 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 19% · Green 5% · Blue 81%

Cyan 77% · Magenta 94% · Yellow 0% · Key 19%

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

Previews

CSS code for #300CCF

.text { color: #300CCF; }
.background { background-color: #300CCF; }
.border { border: 3px solid #300CCF; }
.text-rgb { color: rgb(48, 12, 207); }
.text-hsl { color: hsl(251, 89%, 43%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #300CCF; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(48, 12, 207, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #300CCF; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(48, 12, 207, 0.8); }

HTML: <p style="color:#300CCF">Text here</p> · <div style="background-color:#300CCF">Div content here</div>

Shades of #300CCF

Tints of #300CCF

Tones of #300CCF

Color harmonies

Complementary — #ABCF0C:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #300CCF: #FFFFFF.

Semi-transparent (opacity) text on #300CCF

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 #300CCF 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 #300CCF 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

← #300CCE  ·  #300CD0 →

Frequently asked questions

What color is #300CCF?

#300CCF is Vivid Blue, a blue color (RGB 48, 12, 207). Its closest standard named color is Blue.

What is the RGB and HSL of #300CCF?

#300CCF is RGB 48, 12, 207 — HSL 251°, 89%, 43% — CMYK 77%, 94%, 0%, 19%.

What colors go with #300CCF?

Its complement is #ABCF0C; analogous partners are #0C4ACF and #910CCF. It also appears in 6+ palettes in our collection.

Can I use #300CCF for text?

White text on #300CCF has a contrast ratio of 10.10:1 (passes WCAG AA); black text gives 2.08:1.