What color is #3D64B8?

#3D64B8 is a medium blue. In RGB it is rgb(61, 100, 184), and in HSL hsl(221, 50%, 48%).

Is #3D64B8 accessible as text?

On white, #3D64B8 has a contrast ratio of 5.66:1 (passes WCAG AA for body text); on black it is 3.71:1 (fails). For text placed on #3D64B8, use white for the best readability.

What is the closest Tailwind color to #3D64B8?

The nearest Tailwind CSS token is sky-700 (#0069A8).

What colors go well with #3D64B8?

#3D64B8 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B8913D. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3D64B8 below.

Is #3D64B8 good for buttons?

#3D64B8 works well for buttons and highlights, but use white text on #3D64B8 — black text only reaches 3.71:1, below the 4.5:1 needed for normal-size labels.

Is #3D64B8 the same as CSS royalblue?

No — #3D64B8 is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#3D64B8 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3D64B8

Not just a swatch — here's how #3D64B8 works with other colors. Named schemes with #3D64B8 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #3D64B8 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Denim 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 #3D64B8 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #638AD8

Denim 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 Denim Blue.

Vintage Leather Lead · 5 colors

Lead #3D64B8 Secondary #7F4536 Surface #EED7C2 Accent #375246 Anchor #57223A

Denim 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 #3D64B8 Surface #F6E5D8 Anchor #5B2144 Accent #E4C2CA Secondary #322B2F

Denim 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 #3D64B8 Secondary #8292B0 Support #9D8F88 Ink #18140F

Denim 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 Denim Blue carrying the quiet middle.

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Color Lab

How #3D64B8 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 15/100

Cool

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

Softness 40/100

Low

Middle-weight — neither delicate nor heavy.

Depth 49/100

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 44/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 54/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 38/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 100/100

Very high

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

Surface fit 12/100

Very low

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

Print safety 74/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #3D64B8

For UI

For branding

For interior

For fashion

People also use #3D64B8 with

Verdigris Grape 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 5.7:1. Use

Subtle surface Use #DBE1EE for cards and hover fills. Tint 80

Avoid beside #3F3DB8 — 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 #3D64B8 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

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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: #3D64B8;
  --color-base-rgb: 61 100 184;
  --color-base-oklch: oklch(51.9% 0.140 263.5);
  --color-50: #F3F6FC;
  --color-100: #E0E7F5;
  --color-200: #C2CFEB;
  --color-300: #97ACD8;
  --color-400: #708AC2;
  --color-500: #4E6AA6;
  --color-600: #425580;
  --color-700: #33405C;
  --color-800: #242C3C;
  --color-900: #181C25;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  denim-blue: {
    50: '#F3F6FC',
    100: '#E0E7F5',
    200: '#C2CFEB',
    300: '#97ACD8',
    400: '#708AC2',
    500: '#4E6AA6',
    600: '#425580',
    700: '#33405C',
    800: '#242C3C',
    900: '#181C25',
  },
}

$base: #3D64B8;
$base-ink: #FFFFFF;
$base-50: #F3F6FC;
$base-100: #E0E7F5;
$base-200: #C2CFEB;
$base-300: #97ACD8;
$base-400: #708AC2;
$base-500: #4E6AA6;
$base-600: #425580;
$base-700: #33405C;
$base-800: #242C3C;
$base-900: #181C25;
$base-hover: #315093;
$base-subtle: #C8D2E6;

{
    "color": {
        "base": {
            "value": "#3D64B8",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F6FC",
                "type": "color"
            },
            "100": {
                "value": "#E0E7F5",
                "type": "color"
            },
            "200": {
                "value": "#C2CFEB",
                "type": "color"
            },
            "300": {
                "value": "#97ACD8",
                "type": "color"
            },
            "400": {
                "value": "#708AC2",
                "type": "color"
            },
            "500": {
                "value": "#4E6AA6",
                "type": "color"
            },
            "600": {
                "value": "#425580",
                "type": "color"
            },
            "700": {
                "value": "#33405C",
                "type": "color"
            },
            "800": {
                "value": "#242C3C",
                "type": "color"
            },
            "900": {
                "value": "#181C25",
                "type": "color"
            }
        }
    }
}

Palettes built on #3D64B8

Color Lab

Pairs with #3D64B8

UI roles & guardrails

In real applications

Scales

Every model

Export