What color is #3857AE?

#3857AE is a medium blue. In RGB it is rgb(56, 87, 174), and in HSL hsl(224, 51%, 45%).

Is #3857AE accessible as text?

On white, #3857AE has a contrast ratio of 6.68:1 (passes WCAG AA for body text); on black it is 3.14:1 (fails). For text placed on #3857AE, use white for the best readability.

What is the closest Tailwind color to #3857AE?

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

What colors go well with #3857AE?

#3857AE pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #AD8E38. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3857AE below.

Is #3857AE good for buttons?

#3857AE works well for buttons and highlights, but use white text on #3857AE — black text only reaches 3.14:1, below the 4.5:1 needed for normal-size labels.

Is #3857AE the same as CSS darkslateblue?

No — #3857AE is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#3857AE Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3857AE

Not just a swatch — here's how #3857AE works with other colors. Named schemes with #3857AE in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #3857AE Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Cerulean 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 #3857AE Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #5D7DCE

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

Vintage Leather Lead · 5 colors

Lead #3857AE Secondary #7F4536 Surface #EED7C2 Accent #365246 Anchor #58223A

Cerulean 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 #3857AE Surface #F6E5D8 Anchor #5B2144 Accent #E5C2CA Secondary #322B2F

Cerulean 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 #3857AE Secondary #7986A6 Support #9D8F88 Ink #18140F

Cerulean 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 Cerulean carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #3857AE 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 16/100

Cool

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

Softness 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 53/100

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 40/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 57/100

Moderate

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

Brand distinctiveness 39/100

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 10/100

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 #3857AE

For UI

For branding

For interior

For fashion

People also use #3857AE 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 6.7:1. Use

Subtle surface Use #D9DEED for cards and hover fills. Tint 80

Avoid beside #4038AD — 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 #3857AE at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #3857AE;
  --color-base-rgb: 56 87 174;
  --color-base-oklch: oklch(48.1% 0.144 266.3);
  --color-50: #F3F5FC;
  --color-100: #E0E5F6;
  --color-200: #C1CDEB;
  --color-300: #97A8D9;
  --color-400: #6F85C3;
  --color-500: #4E65A7;
  --color-600: #415281;
  --color-700: #333E5C;
  --color-800: #242B3D;
  --color-900: #181B26;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cerulean: {
    50: '#F3F5FC',
    100: '#E0E5F6',
    200: '#C1CDEB',
    300: '#97A8D9',
    400: '#6F85C3',
    500: '#4E65A7',
    600: '#415281',
    700: '#333E5C',
    800: '#242B3D',
    900: '#181B26',
  },
}

$base: #3857AE;
$base-ink: #FFFFFF;
$base-50: #F3F5FC;
$base-100: #E0E5F6;
$base-200: #C1CDEB;
$base-300: #97A8D9;
$base-400: #6F85C3;
$base-500: #4E65A7;
$base-600: #415281;
$base-700: #333E5C;
$base-800: #242B3D;
$base-900: #181B26;
$base-hover: #2D468B;
$base-subtle: #C5CDE5;

{
    "color": {
        "base": {
            "value": "#3857AE",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F5FC",
                "type": "color"
            },
            "100": {
                "value": "#E0E5F6",
                "type": "color"
            },
            "200": {
                "value": "#C1CDEB",
                "type": "color"
            },
            "300": {
                "value": "#97A8D9",
                "type": "color"
            },
            "400": {
                "value": "#6F85C3",
                "type": "color"
            },
            "500": {
                "value": "#4E65A7",
                "type": "color"
            },
            "600": {
                "value": "#415281",
                "type": "color"
            },
            "700": {
                "value": "#333E5C",
                "type": "color"
            },
            "800": {
                "value": "#242B3D",
                "type": "color"
            },
            "900": {
                "value": "#181B26",
                "type": "color"
            }
        }
    }
}

Palettes built on #3857AE

Color Lab

Pairs with #3857AE

UI roles & guardrails

In real applications

Scales

Every model

Export