What color is #306FE3?

#306FE3 is a medium, vivid blue. In RGB it is rgb(48, 111, 227), and in HSL hsl(219, 76%, 54%).

Is #306FE3 accessible as text?

On white, #306FE3 has a contrast ratio of 4.66:1 (passes WCAG AA for body text); on black it is 4.51:1 (passes). For text placed on #306FE3, use white for the best readability.

What is the closest Tailwind color to #306FE3?

The nearest Tailwind CSS token is blue-500 (#2B7FFF).

What colors go well with #306FE3?

#306FE3 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #E3A431. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #306FE3 below.

Is #306FE3 good for buttons?

#306FE3 works for buttons; white text has the higher contrast, so prefer it for labels.

Is #306FE3 the same as CSS royalblue?

No — #306FE3 is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#306FE3 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #306FE3

Not just a swatch — here's how #306FE3 works with other colors. Named schemes with #306FE3 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #306FE3 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5C97FF

Royal Blue is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Royal Blue.

Coastal Morning Lead · 5 colors

Lead #306FE3 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Royal Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Berry & Cream Lead · 5 colors

Lead #306FE3 Surface #F6E5D8 Anchor #5A2144 Accent #E4C2CA Secondary #322B2F

Royal Blue sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #306FE3 Secondary #8AA1CA Support #9D8F88 Ink #18140F

Royal Blue is the single accent in this high-contrast editorial system — set on near-white paper against near-black ink, with a warm grey and a desaturated tint of Royal Blue carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #306FE3 Secondary #E76A76 Accent #F79152 Anchor #573B58 Surface #EEEBD6

Royal Blue glows at the center of this sunset palette, joined by coral and gold, deepened by a plum anchor and cooled with cream.

Build a working theme in the generator →

Color Lab

How #306FE3 actually behaves in design work — read from its OKLCH lightness, chroma and hue, not just its raw numbers. Ten signals to help you decide where this color earns its place.

Warmth 7/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 46/100

Moderate

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 28/100

Low

A faint retro warmth without tipping into sepia.

Luxury 46/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 73/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 89/100

Very high

Strong interactive accent — visible and can carry a legible label.

Surface fit 14/100

Very low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 64/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #306FE3

For UI

For branding

For interior

For fashion

People also use #306FE3 with

Turquoise Han Purple Goldenrod Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with white label. AA

Body text Passes on white at 16px and above. Pass

Large display Fine for headings 24px+ on white. Pass

Background Pair with white text at 4.7:1. Use

Subtle surface Use #DBE4F4 for cards and hover fills. Tint 80

Avoid beside #3134E3 — the hue gap is too small to read as intentional. Clash

In real applications

Not a swatch to memorise — a color to build with. Here is #306FE3 at work across the surfaces designers actually ship.

Website / UI

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Dashboard

Revenue

$48.2k ▲ 12%

Brand

AVELINE

Studio

Poster

Nov 14 · 8PM

NIGHT
MARKET

Packaging

BLOOM

Botanical Wash

250 ml

Interior

Every model

Export

:root {
  --color-base: #306FE3;
  --color-base-rgb: 48 111 227;
  --color-base-oklch: oklch(56.7% 0.188 261.3);
  --color-50: #F1F5FE;
  --color-100: #DAE6FB;
  --color-200: #B7CDF5;
  --color-300: #87A9E9;
  --color-400: #5A86D8;
  --color-500: #3766BD;
  --color-600: #325390;
  --color-700: #293E66;
  --color-800: #1E2B43;
  --color-900: #141C29;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  royal-blue: {
    50: '#F1F5FE',
    100: '#DAE6FB',
    200: '#B7CDF5',
    300: '#87A9E9',
    400: '#5A86D8',
    500: '#3766BD',
    600: '#325390',
    700: '#293E66',
    800: '#1E2B43',
    900: '#141C29',
  },
}

$base: #306FE3;
$base-ink: #FFFFFF;
$base-50: #F1F5FE;
$base-100: #DAE6FB;
$base-200: #B7CDF5;
$base-300: #87A9E9;
$base-400: #5A86D8;
$base-500: #3766BD;
$base-600: #325390;
$base-700: #293E66;
$base-800: #1E2B43;
$base-900: #141C29;
$base-hover: #1A55C2;
$base-subtle: #C7D6F0;

{
    "color": {
        "base": {
            "value": "#306FE3",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F5FE",
                "type": "color"
            },
            "100": {
                "value": "#DAE6FB",
                "type": "color"
            },
            "200": {
                "value": "#B7CDF5",
                "type": "color"
            },
            "300": {
                "value": "#87A9E9",
                "type": "color"
            },
            "400": {
                "value": "#5A86D8",
                "type": "color"
            },
            "500": {
                "value": "#3766BD",
                "type": "color"
            },
            "600": {
                "value": "#325390",
                "type": "color"
            },
            "700": {
                "value": "#293E66",
                "type": "color"
            },
            "800": {
                "value": "#1E2B43",
                "type": "color"
            },
            "900": {
                "value": "#141C29",
                "type": "color"
            }
        }
    }
}