Palettes / Colors / #665EFE

#665EFE — Light Vivid Blue

#665EFE is a blue color we call Light 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 #665EFE 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.

#665EFE 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 #F6FE5D; it also sits naturally between #5DA5FE and #B55DFE. 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 40% · Green 37% · Blue 100%

Cyan 60% · Magenta 63% · Yellow 0% · Key 0%

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

Previews

CSS code for #665EFE

.text { color: #665EFE; }
.background { background-color: #665EFE; }
.border { border: 3px solid #665EFE; }
.text-rgb { color: rgb(102, 94, 254); }
.text-hsl { color: hsl(243, 99%, 68%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #665EFE; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(102, 94, 254, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #665EFE; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(102, 94, 254, 0.8); }

HTML: <p style="color:#665EFE">Text here</p> · <div style="background-color:#665EFE">Div content here</div>

Shades of #665EFE

Tints of #665EFE

Tones of #665EFE

Color harmonies

Complementary — #F6FE5D:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #665EFE: #000000.

Semi-transparent (opacity) text on #665EFE

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 #665EFE 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 #665EFE 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

← #665EFD  ·  #665EFF →

Frequently asked questions

What color is #665EFE?

#665EFE is Light Vivid Blue, a blue color (RGB 102, 94, 254). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #665EFE?

#665EFE is RGB 102, 94, 254 — HSL 243°, 99%, 68% — CMYK 60%, 63%, 0%, 0%.

What colors go with #665EFE?

Its complement is #F6FE5D; analogous partners are #5DA5FE and #B55DFE. It also appears in 6+ palettes in our collection.

Can I use #665EFE for text?

Black text on #665EFE has a contrast ratio of 4.60:1 (passes WCAG AA); white text gives 4.57:1.