Palettes / Colors / #403DF8

#403DF8 — Vivid Blue

#403DF8 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 #403DF8 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.

#403DF8 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 #F5F83F; it also sits naturally between #3F98F8 and #9F3FF8. In the palettes below you can see it working alongside real color combinations from our collection.

Copy HEX Copy RGB Copy HSL Download PNG swatch SVG

Color values

RGB & CMYK percentages

Red 25% · Green 24% · Blue 97%

Cyan 74% · Magenta 75% · Yellow 0% · Key 3%

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

Previews

CSS code for #403DF8

.text { color: #403DF8; }
.background { background-color: #403DF8; }
.border { border: 3px solid #403DF8; }
.text-rgb { color: rgb(64, 61, 248); }
.text-hsl { color: hsl(241, 93%, 61%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #403DF8; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(64, 61, 248, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #403DF8; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(64, 61, 248, 0.8); }

HTML: <p style="color:#403DF8">Text here</p> · <div style="background-color:#403DF8">Div content here</div>

Shades of #403DF8

Tints of #403DF8

Tones of #403DF8

Color harmonies

Complementary — #F5F83F:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #403DF8: #FFFFFF.

Semi-transparent (opacity) text on #403DF8

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 #403DF8 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 #403DF8 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

← #403DF7  ·  #403DF9 →

Frequently asked questions

What color is #403DF8?

#403DF8 is Vivid Blue, a blue color (RGB 64, 61, 248). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #403DF8?

#403DF8 is RGB 64, 61, 248 — HSL 241°, 93%, 61% — CMYK 74%, 75%, 0%, 3%.

What colors go with #403DF8?

Its complement is #F5F83F; analogous partners are #3F98F8 and #9F3FF8. It also appears in 6+ palettes in our collection.

Can I use #403DF8 for text?

White text on #403DF8 has a contrast ratio of 6.48:1 (passes WCAG AA); black text gives 3.24:1.