What color is #307AFB?

#307AFB is a medium, vivid blue. In RGB it is rgb(48, 122, 251), and in HSL hsl(218, 96%, 59%).

Is #307AFB accessible as text?

On white, #307AFB has a contrast ratio of 3.96:1 (fails WCAG AA for body text); on black it is 5.30:1 (passes). For text placed on #307AFB, use black for the best readability.

What is the closest Tailwind color to #307AFB?

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

What colors go well with #307AFB?

#307AFB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #FBB132. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #307AFB below.

Is #307AFB good for buttons?

#307AFB works well for buttons and highlights, but use black text on #307AFB — white text only reaches 3.96:1, below the 4.5:1 needed for normal-size labels.

Is #307AFB the same as CSS royalblue?

No — #307AFB is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#307AFB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #307AFB

Not just a swatch — here's how #307AFB works with other colors. Named schemes with #307AFB in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #307AFB Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5FA3FF

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

Coastal Morning Lead · 5 colors

Lead #307AFB Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Azure 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 #307AFB Surface #F6E5D8 Anchor #5A2144 Accent #E4C2CA Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #307AFB Secondary #93AEDB Support #9D8F88 Ink #18140F

Azure 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 Azure carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #307AFB Secondary #E76A76 Accent #F79152 Anchor #573B58 Surface #EEEBD6

Azure 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 #307AFB 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 42/100

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 21/100

Low

Clean and current — no dusty, aged cast.

Luxury 42/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 80/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 76/100

High

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

Surface fit 18/100

Very low

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

Print safety 60/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #307AFB

For UI

For branding

For interior

For fashion

People also use #307AFB with

Electric Blue Han Purple Marigold Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with near-black label. AA

Body text Do not use for body copy on light surfaces. Avoid

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

Background Pair with #141310 text at 4.7:1. Use

Subtle surface Use #DCE6F9 for cards and hover fills. Tint 80

Avoid beside #3239FB — 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 #307AFB 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: #307AFB;
  --color-base-rgb: 48 122 251;
  --color-base-oklch: oklch(60.7% 0.206 260.7);
  --color-50: #F0F5FE;
  --color-100: #D8E6FD;
  --color-200: #B1CCFC;
  --color-300: #7AA7F6;
  --color-400: #4A84E8;
  --color-500: #2664CF;
  --color-600: #25519D;
  --color-700: #213D6E;
  --color-800: #192A48;
  --color-900: #121B2C;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  azure: {
    50: '#F0F5FE',
    100: '#D8E6FD',
    200: '#B1CCFC',
    300: '#7AA7F6',
    400: '#4A84E8',
    500: '#2664CF',
    600: '#25519D',
    700: '#213D6E',
    800: '#192A48',
    900: '#121B2C',
  },
}

$base: #307AFB;
$base-ink: #141310;
$base-50: #F0F5FE;
$base-100: #D8E6FD;
$base-200: #B1CCFC;
$base-300: #7AA7F6;
$base-400: #4A84E8;
$base-500: #2664CF;
$base-600: #25519D;
$base-700: #213D6E;
$base-800: #192A48;
$base-900: #121B2C;
$base-hover: #055AEC;
$base-subtle: #C9DAF7;

{
    "color": {
        "base": {
            "value": "#307AFB",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F5FE",
                "type": "color"
            },
            "100": {
                "value": "#D8E6FD",
                "type": "color"
            },
            "200": {
                "value": "#B1CCFC",
                "type": "color"
            },
            "300": {
                "value": "#7AA7F6",
                "type": "color"
            },
            "400": {
                "value": "#4A84E8",
                "type": "color"
            },
            "500": {
                "value": "#2664CF",
                "type": "color"
            },
            "600": {
                "value": "#25519D",
                "type": "color"
            },
            "700": {
                "value": "#213D6E",
                "type": "color"
            },
            "800": {
                "value": "#192A48",
                "type": "color"
            },
            "900": {
                "value": "#121B2C",
                "type": "color"
            }
        }
    }
}

Palettes built on #307AFB

Color Lab

Pairs with #307AFB

UI roles & guardrails

In real applications

Scales

Every model

Export