What color is #3973CC?

#3973CC is a medium blue. In RGB it is rgb(57, 115, 204), and in HSL hsl(216, 59%, 51%).

Is #3973CC accessible as text?

On white, #3973CC has a contrast ratio of 4.67:1 (passes WCAG AA for body text); on black it is 4.50:1 (fails). For text placed on #3973CC, use white for the best readability.

What is the closest Tailwind color to #3973CC?

The nearest Tailwind CSS token is sky-600 (#0084D1).

What colors go well with #3973CC?

#3973CC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #CC9138. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3973CC below.

Is #3973CC good for buttons?

#3973CC works well for buttons and highlights, but use white text on #3973CC — black text only reaches 4.50:1, below the 4.5:1 needed for normal-size labels.

Is #3973CC the same as CSS royalblue?

No — #3973CC is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#3973CC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3973CC

Not just a swatch — here's how #3973CC works with other colors. Named schemes with #3973CC in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #3973CC Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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

Tech Product Signal · 5 colors

Signal #3973CC Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #6499EC

True 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 True Blue.

Vintage Leather Lead · 5 colors

Lead #3973CC Secondary #7F4536 Surface #E1DDC1 Accent #375246 Anchor #57223A

True Blue plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Berry & Cream Lead · 5 colors

Lead #3973CC Surface #EDE9D6 Anchor #5A2144 Accent #E4C2CA Secondary #322B2F

True Blue 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 #3973CC Secondary #8CA1C1 Support #9D8F89 Ink #16140F

True 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 True Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #3973CC 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 11/100

Cool

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

Softness 41/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 45/100

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 41/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 49/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 41/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 98/100

Very high

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

Surface fit 13/100

Very low

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

Print safety 70/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #3973CC

For UI

For branding

For interior

For fashion

People also use #3973CC with

Medium Turquoise Cerulean Caramel 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 #DBE4F1 for cards and hover fills. Tint 80

Avoid beside #3842CC — 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 #3973CC 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: #3973CC;
  --color-base-rgb: 57 115 204;
  --color-base-oklch: oklch(56.3% 0.151 258.8);
  --color-50: #F2F6FC;
  --color-100: #DEE8F7;
  --color-200: #BED1EE;
  --color-300: #92B0DE;
  --color-400: #688FCA;
  --color-500: #4670AE;
  --color-600: #3C5A86;
  --color-700: #30435F;
  --color-800: #222E3F;
  --color-900: #171D27;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  true-blue: {
    50: '#F2F6FC',
    100: '#DEE8F7',
    200: '#BED1EE',
    300: '#92B0DE',
    400: '#688FCA',
    500: '#4670AE',
    600: '#3C5A86',
    700: '#30435F',
    800: '#222E3F',
    900: '#171D27',
  },
}

$base: #3973CC;
$base-ink: #FFFFFF;
$base-50: #F2F6FC;
$base-100: #DEE8F7;
$base-200: #BED1EE;
$base-300: #92B0DE;
$base-400: #688FCA;
$base-500: #4670AE;
$base-600: #3C5A86;
$base-700: #30435F;
$base-800: #222E3F;
$base-900: #171D27;
$base-hover: #2B5CA5;
$base-subtle: #C9D6EA;

{
    "color": {
        "base": {
            "value": "#3973CC",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F6FC",
                "type": "color"
            },
            "100": {
                "value": "#DEE8F7",
                "type": "color"
            },
            "200": {
                "value": "#BED1EE",
                "type": "color"
            },
            "300": {
                "value": "#92B0DE",
                "type": "color"
            },
            "400": {
                "value": "#688FCA",
                "type": "color"
            },
            "500": {
                "value": "#4670AE",
                "type": "color"
            },
            "600": {
                "value": "#3C5A86",
                "type": "color"
            },
            "700": {
                "value": "#30435F",
                "type": "color"
            },
            "800": {
                "value": "#222E3F",
                "type": "color"
            },
            "900": {
                "value": "#171D27",
                "type": "color"
            }
        }
    }
}

Palettes built on #3973CC

Color Lab

Pairs with #3973CC

UI roles & guardrails

In real applications

Scales

Every model

Export