Palettes / Colors / #040CFB

#040CFB — Vivid Blue

#040CFB 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 #040CFB 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.

#040CFB 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 #FBF304; it also sits naturally between #0488FB and #7704FB. 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 5% · Blue 98%

Cyan 98% · Magenta 95% · Yellow 0% · Key 2%

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

Previews

CSS code for #040CFB

.text { color: #040CFB; }
.background { background-color: #040CFB; }
.border { border: 3px solid #040CFB; }
.text-rgb { color: rgb(4, 12, 251); }
.text-hsl { color: hsl(238, 97%, 50%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #040CFB; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(4, 12, 251, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #040CFB; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(4, 12, 251, 0.8); }

HTML: <p style="color:#040CFB">Text here</p> · <div style="background-color:#040CFB">Div content here</div>

Shades of #040CFB

Tints of #040CFB

Tones of #040CFB

Color harmonies

Complementary — #FBF304:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #040CFB: #FFFFFF.

Semi-transparent (opacity) text on #040CFB

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 #040CFB 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 #040CFB 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

← #040CFA  ·  #040CFC →

Frequently asked questions

What color is #040CFB?

#040CFB is Vivid Blue, a blue color (RGB 4, 12, 251). Its closest standard named color is Blue.

What is the RGB and HSL of #040CFB?

#040CFB is RGB 4, 12, 251 — HSL 238°, 97%, 50% — CMYK 98%, 95%, 0%, 2%.

What colors go with #040CFB?

Its complement is #FBF304; analogous partners are #0488FB and #7704FB. It also appears in 6+ palettes in our collection.

Can I use #040CFB for text?

White text on #040CFB has a contrast ratio of 8.57:1 (passes WCAG AA); black text gives 2.45:1.