Palettes / Colors / #397FEC

#397FEC — Vivid Blue

#397FEC 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 #397FEC 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.

#397FEC 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 #EBA637; it also sits naturally between #37D6EB and #4C37EB. 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 22% · Green 50% · Blue 93%

Cyan 76% · Magenta 46% · Yellow 0% · Key 7%

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

Previews

CSS code for #397FEC

.text { color: #397FEC; }
.background { background-color: #397FEC; }
.border { border: 3px solid #397FEC; }
.text-rgb { color: rgb(57, 127, 236); }
.text-hsl { color: hsl(217, 82%, 57%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #397FEC; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(57, 127, 236, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #397FEC; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(57, 127, 236, 0.8); }

HTML: <p style="color:#397FEC">Text here</p> · <div style="background-color:#397FEC">Div content here</div>

Shades of #397FEC

Tints of #397FEC

Tones of #397FEC

Color harmonies

Complementary — #EBA637:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #397FEC: #000000.

Semi-transparent (opacity) text on #397FEC

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 #397FEC 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 #397FEC 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

← #397FEB  ·  #397FED →

Frequently asked questions

What color is #397FEC?

#397FEC is Vivid Blue, a blue color (RGB 57, 127, 236). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #397FEC?

#397FEC is RGB 57, 127, 236 — HSL 217°, 82%, 57% — CMYK 76%, 46%, 0%, 7%.

What colors go with #397FEC?

Its complement is #EBA637; analogous partners are #37D6EB and #4C37EB. It also appears in 6+ palettes in our collection.

Can I use #397FEC for text?

Black text on #397FEC has a contrast ratio of 5.42:1 (passes WCAG AA); white text gives 3.87:1.