Palettes / Colors / #623FEF

#623FEF — Vivid Blue

#623FEF is a blue color we call Vivid Blue, closest to the named color SlateBlue (#6A5ACD). It belongs to the blue family.

Color name

Closest CSS keyword: slateblue (#6A5ACD) — not an exact match. CSS slateblue gives you #6A5ACD, a different color; use #623FEF 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.

#623FEF 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 #CCEF3E; it also sits naturally between #3E73EF and #BA3EEF. 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 38% · Green 25% · Blue 94%

Cyan 59% · Magenta 74% · Yellow 0% · Key 6%

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

Previews

CSS code for #623FEF

.text { color: #623FEF; }
.background { background-color: #623FEF; }
.border { border: 3px solid #623FEF; }
.text-rgb { color: rgb(98, 63, 239); }
.text-hsl { color: hsl(252, 85%, 59%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #623FEF; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(98, 63, 239, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #623FEF; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(98, 63, 239, 0.8); }

HTML: <p style="color:#623FEF">Text here</p> · <div style="background-color:#623FEF">Div content here</div>

Shades of #623FEF

Tints of #623FEF

Tones of #623FEF

Color harmonies

Complementary — #CCEF3E:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #623FEF: #FFFFFF.

Semi-transparent (opacity) text on #623FEF

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 #623FEF 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 #623FEF 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

← #623FEE  ·  #623FF0 →

Frequently asked questions

What color is #623FEF?

#623FEF is Vivid Blue, a blue color (RGB 98, 63, 239). Its closest standard named color is SlateBlue.

What is the RGB and HSL of #623FEF?

#623FEF is RGB 98, 63, 239 — HSL 252°, 85%, 59% — CMYK 59%, 74%, 0%, 6%.

What colors go with #623FEF?

Its complement is #CCEF3E; analogous partners are #3E73EF and #BA3EEF. It also appears in 6+ palettes in our collection.

Can I use #623FEF for text?

White text on #623FEF has a contrast ratio of 6.04:1 (passes WCAG AA); black text gives 3.48:1.