What color is #3F5BA6?

#3F5BA6 is a medium blue. In RGB it is rgb(63, 91, 166), and in HSL hsl(224, 45%, 45%).

Is #3F5BA6 accessible as text?

On white, #3F5BA6 has a contrast ratio of 6.44:1 (passes WCAG AA for body text); on black it is 3.26:1 (fails). For text placed on #3F5BA6, use white for the best readability.

What is the closest Tailwind color to #3F5BA6?

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

What colors go well with #3F5BA6?

#3F5BA6 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #A68B3F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3F5BA6 below.

Is #3F5BA6 good for buttons?

#3F5BA6 works well for buttons and highlights, but use white text on #3F5BA6 — black text only reaches 3.26:1, below the 4.5:1 needed for normal-size labels.

Is #3F5BA6 the same as CSS darkslateblue?

No — #3F5BA6 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#3F5BA6 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3F5BA6

Not just a swatch — here's how #3F5BA6 works with other colors. Named schemes with #3F5BA6 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #3F5BA6 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Lapis Lazuli 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 #3F5BA6 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #6380C6

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

Vintage Leather Lead · 5 colors

Lead #3F5BA6 Secondary #7F4536 Surface #EED7C2 Accent #365246 Anchor #58223A

Lapis Lazuli 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 #3F5BA6 Surface #F6E5D8 Anchor #5B2144 Accent #E5C2CA Secondary #322B2F

Lapis Lazuli 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 #3F5BA6 Secondary #7C88A4 Support #9D8F88 Ink #18140F

Lapis Lazuli 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 Lapis Lazuli carrying the quiet middle.

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Color Lab

How #3F5BA6 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 20/100

Cool

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

Softness 39/100

Low

Middle-weight — neither delicate nor heavy.

Depth 52/100

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 47/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 58/100

Moderate

Restrained and premium — deep, quiet, high-end packaging and fashion.

Brand distinctiveness 34/100

Low

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 15/100

Very low

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

Print safety 78/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #3F5BA6

For UI

For branding

For interior

For fashion

People also use #3F5BA6 with

Verdigris Rebecca Purple Dark Goldenrod 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 6.4:1. Use

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

Avoid beside #463FA6 — 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 #3F5BA6 at work across the surfaces designers actually ship.

Website / UI

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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: #3F5BA6;
  --color-base-rgb: 63 91 166;
  --color-base-oklch: oklch(48.8% 0.125 266.4);
  --color-50: #F4F6FB;
  --color-100: #E1E6F4;
  --color-200: #C4CEE8;
  --color-300: #9BAAD5;
  --color-400: #7488BE;
  --color-500: #5368A2;
  --color-600: #45547D;
  --color-700: #353F5A;
  --color-800: #262B3B;
  --color-900: #191C25;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  lapis-lazuli: {
    50: '#F4F6FB',
    100: '#E1E6F4',
    200: '#C4CEE8',
    300: '#9BAAD5',
    400: '#7488BE',
    500: '#5368A2',
    600: '#45547D',
    700: '#353F5A',
    800: '#262B3B',
    900: '#191C25',
  },
}

$base: #3F5BA6;
$base-ink: #FFFFFF;
$base-50: #F4F6FB;
$base-100: #E1E6F4;
$base-200: #C4CEE8;
$base-300: #9BAAD5;
$base-400: #7488BE;
$base-500: #5368A2;
$base-600: #45547D;
$base-700: #353F5A;
$base-800: #262B3B;
$base-900: #191C25;
$base-hover: #324985;
$base-subtle: #C7CEE3;

{
    "color": {
        "base": {
            "value": "#3F5BA6",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F6FB",
                "type": "color"
            },
            "100": {
                "value": "#E1E6F4",
                "type": "color"
            },
            "200": {
                "value": "#C4CEE8",
                "type": "color"
            },
            "300": {
                "value": "#9BAAD5",
                "type": "color"
            },
            "400": {
                "value": "#7488BE",
                "type": "color"
            },
            "500": {
                "value": "#5368A2",
                "type": "color"
            },
            "600": {
                "value": "#45547D",
                "type": "color"
            },
            "700": {
                "value": "#353F5A",
                "type": "color"
            },
            "800": {
                "value": "#262B3B",
                "type": "color"
            },
            "900": {
                "value": "#191C25",
                "type": "color"
            }
        }
    }
}

Palettes built on #3F5BA6

Color Lab

Pairs with #3F5BA6

UI roles & guardrails

In real applications

Scales

Every model

Export