What color is #3979F3?

#3979F3 is a medium, vivid blue. In RGB it is rgb(57, 121, 243), and in HSL hsl(219, 89%, 59%).

Is #3979F3 accessible as text?

On white, #3979F3 has a contrast ratio of 4.04:1 (fails WCAG AA for body text); on black it is 5.20:1 (passes). For text placed on #3979F3, use black for the best readability.

What is the closest Tailwind color to #3979F3?

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

What colors go well with #3979F3?

#3979F3 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #F3B239. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3979F3 below.

Is #3979F3 good for buttons?

#3979F3 works well for buttons and highlights, but use black text on #3979F3 — white text only reaches 4.04:1, below the 4.5:1 needed for normal-size labels.

Is #3979F3 the same as CSS royalblue?

No — #3979F3 is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#3979F3 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3979F3

Not just a swatch — here's how #3979F3 works with other colors. Named schemes with #3979F3 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #3979F3 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #65A1FF

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 #3979F3 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 #3979F3 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 #F8F4EF Accent #3979F3 Secondary #94ACD7 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 #3979F3 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 #3979F3 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 38/100

Low

Middle-weight — neither delicate nor heavy.

Depth 43/100

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 25/100

Low

Clean and current — no dusty, aged cast.

Luxury 43/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 75/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 81/100

Very high

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

Surface fit 17/100

Very low

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

Print safety 63/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #3979F3

For UI

For branding

For interior

For fashion

People also use #3979F3 with

Electric Blue Han Purple Honey 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 4.6:1. Use

Subtle surface Use #DDE6F7 for cards and hover fills. Tint 80

Avoid beside #393DF3 — 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 #3979F3 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: #3979F3;
  --color-base-rgb: 57 121 243;
  --color-base-oklch: oklch(60.2% 0.195 261.7);
  --color-50: #F0F5FE;
  --color-100: #D8E5FD;
  --color-200: #B2CBFA;
  --color-300: #7EA6F1;
  --color-400: #4F83E3;
  --color-500: #2C63C9;
  --color-600: #2A5098;
  --color-700: #233D6B;
  --color-800: #1B2A46;
  --color-900: #131B2B;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  azure: {
    50: '#F0F5FE',
    100: '#D8E5FD',
    200: '#B2CBFA',
    300: '#7EA6F1',
    400: '#4F83E3',
    500: '#2C63C9',
    600: '#2A5098',
    700: '#233D6B',
    800: '#1B2A46',
    900: '#131B2B',
  },
}

$base: #3979F3;
$base-ink: #141310;
$base-50: #F0F5FE;
$base-100: #D8E5FD;
$base-200: #B2CBFA;
$base-300: #7EA6F1;
$base-400: #4F83E3;
$base-500: #2C63C9;
$base-600: #2A5098;
$base-700: #233D6B;
$base-800: #1B2A46;
$base-900: #131B2B;
$base-hover: #0D58E3;
$base-subtle: #CAD9F5;

{
    "color": {
        "base": {
            "value": "#3979F3",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F5FE",
                "type": "color"
            },
            "100": {
                "value": "#D8E5FD",
                "type": "color"
            },
            "200": {
                "value": "#B2CBFA",
                "type": "color"
            },
            "300": {
                "value": "#7EA6F1",
                "type": "color"
            },
            "400": {
                "value": "#4F83E3",
                "type": "color"
            },
            "500": {
                "value": "#2C63C9",
                "type": "color"
            },
            "600": {
                "value": "#2A5098",
                "type": "color"
            },
            "700": {
                "value": "#233D6B",
                "type": "color"
            },
            "800": {
                "value": "#1B2A46",
                "type": "color"
            },
            "900": {
                "value": "#131B2B",
                "type": "color"
            }
        }
    }
}