Palettes / Colors / #307DCF

#307DCF — Blue

#307DCF is a blue color we call 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 #307DCF 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.

#307DCF 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 #CF8230; it also sits naturally between #30CCCF and #3330CF. 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 19% · Green 49% · Blue 81%

Cyan 77% · Magenta 40% · Yellow 0% · Key 19%

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

Previews

CSS code for #307DCF

.text { color: #307DCF; }
.background { background-color: #307DCF; }
.border { border: 3px solid #307DCF; }
.text-rgb { color: rgb(48, 125, 207); }
.text-hsl { color: hsl(211, 62%, 50%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #307DCF; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(48, 125, 207, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #307DCF; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(48, 125, 207, 0.8); }

HTML: <p style="color:#307DCF">Text here</p> · <div style="background-color:#307DCF">Div content here</div>

Shades of #307DCF

Tints of #307DCF

Tones of #307DCF

Color harmonies

Complementary — #CF8230:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #307DCF: #000000.

Semi-transparent (opacity) text on #307DCF

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 #307DCF 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 #307DCF 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

← #307DCE  ·  #307DD0 →

Frequently asked questions

What color is #307DCF?

#307DCF is Blue, a blue color (RGB 48, 125, 207). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #307DCF?

#307DCF is RGB 48, 125, 207 — HSL 211°, 62%, 50% — CMYK 77%, 40%, 0%, 19%.

What colors go with #307DCF?

Its complement is #CF8230; analogous partners are #30CCCF and #3330CF. It also appears in 6+ palettes in our collection.

Can I use #307DCF for text?

Black text on #307DCF has a contrast ratio of 4.96:1 (passes WCAG AA); white text gives 4.23:1.