What color is #405288?

#405288 is a dark blue. In RGB it is rgb(64, 82, 136), and in HSL hsl(225, 36%, 39%).

Is #405288 accessible as text?

On white, #405288 has a contrast ratio of 7.55:1 (passes WCAG AA for body text); on black it is 2.78:1 (fails). For text placed on #405288, use white for the best readability.

What is the closest Tailwind color to #405288?

The nearest Tailwind CSS token is sky-800 (#00598A).

What colors go well with #405288?

#405288 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #877540. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #405288 below.

Is #405288 good for buttons?

#405288 works well for buttons and highlights, but use white text on #405288 — black text only reaches 2.78:1, below the 4.5:1 needed for normal-size labels.

Is #405288 the same as CSS darkslateblue?

No — #405288 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#405288 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #405288

Not just a swatch — here's how #405288 works with other colors. Named schemes with #405288 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #405288 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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

Nordic Calm Accent · 5 colors

Accent #405288 Secondary #AEB4B8 Surface #F1F2F0 Support #7D92A7 Anchor #2E3236

Ultra Violet keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #405288 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #6375A8

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

Vintage Leather Lead · 5 colors

Lead #405288 Secondary #7F4535 Surface #EED7C2 Accent #365246 Anchor #58223A

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #405288 Secondary #757D91 Support #9D8F88 Ink #18140F

Ultra Violet 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 Ultra Violet carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #405288 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 29/100

Cool

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

Softness 40/100

Low

Middle-weight — neither delicate nor heavy.

Depth 54/100

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 54/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 61/100

High

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

Brand distinctiveness 25/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 81/100

Very high

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

Surface fit 28/100

Low

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

Print safety 84/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #405288

For UI

For branding

For interior

For fashion

People also use #405288 with

Air Force Blue Dark Slate Blue Olive Brown Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with white label. AAA

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 7.6:1. Use

Subtle surface Use #D8DCE8 for cards and hover fills. Tint 80

Avoid beside #464087 — 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 #405288 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: #405288;
  --color-base-rgb: 64 82 136;
  --color-base-oklch: oklch(45.0% 0.092 268.6);
  --color-50: #F4F6FA;
  --color-100: #E3E7F2;
  --color-200: #C8CFE5;
  --color-300: #A0ACCF;
  --color-400: #7B8AB7;
  --color-500: #5B6B9A;
  --color-600: #4A5677;
  --color-700: #394056;
  --color-800: #282C39;
  --color-900: #1A1C23;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  ultra-violet: {
    50: '#F4F6FA',
    100: '#E3E7F2',
    200: '#C8CFE5',
    300: '#A0ACCF',
    400: '#7B8AB7',
    500: '#5B6B9A',
    600: '#4A5677',
    700: '#394056',
    800: '#282C39',
    900: '#1A1C23',
  },
}

$base: #405288;
$base-ink: #FFFFFF;
$base-50: #F4F6FA;
$base-100: #E3E7F2;
$base-200: #C8CFE5;
$base-300: #A0ACCF;
$base-400: #7B8AB7;
$base-500: #5B6B9A;
$base-600: #4A5677;
$base-700: #394056;
$base-800: #282C39;
$base-900: #1A1C23;
$base-hover: #33416C;
$base-subtle: #C4CADD;

{
    "color": {
        "base": {
            "value": "#405288",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F6FA",
                "type": "color"
            },
            "100": {
                "value": "#E3E7F2",
                "type": "color"
            },
            "200": {
                "value": "#C8CFE5",
                "type": "color"
            },
            "300": {
                "value": "#A0ACCF",
                "type": "color"
            },
            "400": {
                "value": "#7B8AB7",
                "type": "color"
            },
            "500": {
                "value": "#5B6B9A",
                "type": "color"
            },
            "600": {
                "value": "#4A5677",
                "type": "color"
            },
            "700": {
                "value": "#394056",
                "type": "color"
            },
            "800": {
                "value": "#282C39",
                "type": "color"
            },
            "900": {
                "value": "#1A1C23",
                "type": "color"
            }
        }
    }
}