What color is #5171D1?

#5171D1 is a medium blue. In RGB it is rgb(81, 113, 209), and in HSL hsl(225, 58%, 57%).

Is #5171D1 accessible as text?

On white, #5171D1 has a contrast ratio of 4.53:1 (passes WCAG AA for body text); on black it is 4.63:1 (passes). For text placed on #5171D1, use black for the best readability.

What is the closest Tailwind color to #5171D1?

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

What colors go well with #5171D1?

#5171D1 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #D1B152. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #5171D1 below.

Is #5171D1 good for buttons?

#5171D1 works for buttons; black text has the higher contrast, so prefer it for labels.

Is #5171D1 the same as CSS royalblue?

No — #5171D1 is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#5171D1 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #5171D1

Not just a swatch — here's how #5171D1 works with other colors. Named schemes with #5171D1 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #5171D1 Accent #A5C4C2 Surface #EAD5C0 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.

Tech Product Signal · 5 colors

Signal #5171D1 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #7798F1

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.

Vintage Leather Lead · 5 colors

Lead #5171D1 Secondary #7F4535 Surface #EED7C2 Accent #365246 Anchor #58223A

Royal 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 #5171D1 Surface #F6E5D8 Anchor #5B2143 Accent #E5C2CA 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 #5171D1 Secondary #94A2C5 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.

Build a working theme in the generator →

Color Lab

How #5171D1 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 14/100

Cool

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

Softness 42/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 44/100

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 48/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 41/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 96/100

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 73/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #5171D1

For UI

For branding

For interior

For fashion

People also use #5171D1 with

Lagoon Blue Slate Blue Dark Khaki 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 4.5:1. Use

Subtle surface Use #E0E4F2 for cards and hover fills. Tint 80

Avoid beside #5C52D1 — 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 #5171D1 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: #5171D1;
  --color-base-rgb: 81 113 209;
  --color-base-oklch: oklch(57.3% 0.152 267.6);
  --color-50: #F2F5FC;
  --color-100: #DEE4F7;
  --color-200: #BFCAEE;
  --color-300: #92A5DD;
  --color-400: #6981C9;
  --color-500: #4761AD;
  --color-600: #3D4F85;
  --color-700: #303C5F;
  --color-800: #23293E;
  --color-900: #171B26;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  royal-blue: {
    50: '#F2F5FC',
    100: '#DEE4F7',
    200: '#BFCAEE',
    300: '#92A5DD',
    400: '#6981C9',
    500: '#4761AD',
    600: '#3D4F85',
    700: '#303C5F',
    800: '#23293E',
    900: '#171B26',
  },
}

$base: #5171D1;
$base-ink: #141310;
$base-50: #F2F5FC;
$base-100: #DEE4F7;
$base-200: #BFCAEE;
$base-300: #92A5DD;
$base-400: #6981C9;
$base-500: #4761AD;
$base-600: #3D4F85;
$base-700: #303C5F;
$base-800: #23293E;
$base-900: #171B26;
$base-hover: #3153B8;
$base-subtle: #D0D7ED;

{
    "color": {
        "base": {
            "value": "#5171D1",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F5FC",
                "type": "color"
            },
            "100": {
                "value": "#DEE4F7",
                "type": "color"
            },
            "200": {
                "value": "#BFCAEE",
                "type": "color"
            },
            "300": {
                "value": "#92A5DD",
                "type": "color"
            },
            "400": {
                "value": "#6981C9",
                "type": "color"
            },
            "500": {
                "value": "#4761AD",
                "type": "color"
            },
            "600": {
                "value": "#3D4F85",
                "type": "color"
            },
            "700": {
                "value": "#303C5F",
                "type": "color"
            },
            "800": {
                "value": "#23293E",
                "type": "color"
            },
            "900": {
                "value": "#171B26",
                "type": "color"
            }
        }
    }
}

Palettes built on #5171D1

Color Lab

Pairs with #5171D1

UI roles & guardrails

In real applications

Scales

Every model

Export