What color is #345E8D?

#345E8D is a dark blue. In RGB it is rgb(52, 94, 141), and in HSL hsl(212, 46%, 38%).

Is #345E8D accessible as text?

On white, #345E8D has a contrast ratio of 6.71:1 (passes WCAG AA for body text); on black it is 3.13:1 (fails). For text placed on #345E8D, use white for the best readability.

What is the closest Tailwind color to #345E8D?

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

What colors go well with #345E8D?

#345E8D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #8D6434. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #345E8D below.

Is #345E8D good for buttons?

#345E8D works well for buttons and highlights, but use white text on #345E8D — black text only reaches 3.13:1, below the 4.5:1 needed for normal-size labels.

Is #345E8D the same as CSS darkslateblue?

No — #345E8D is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#345E8D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #345E8D

Not just a swatch — here's how #345E8D works with other colors. Named schemes with #345E8D in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #345E8D Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Lapis Lazuli 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 #345E8D Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A6 Anchor #2E3236

Lapis Lazuli 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 #345E8D Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5B81AE

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 #345E8D Secondary #7F4537 Surface #E1DDC0 Accent #375245 Anchor #57233B

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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #345E8D Secondary #778697 Support #959386 Ink #16140F

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.

Build a working theme in the generator →

Color Lab

How #345E8D 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 25/100

Cool

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

Softness 42/100

Moderate

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 54/100

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 24/100

Low

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

UI accent fit 85/100

Very high

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

Surface fit 27/100

Low

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

Print safety 81/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #345E8D

For UI

For branding

For interior

For fashion

People also use #345E8D with

Light Sea Green Dark Slate Blue Raw Umber 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 #D5DFEA for cards and hover fills. Tint 80

Avoid beside #34408D — 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 #345E8D 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: #345E8D;
  --color-base-rgb: 52 94 141;
  --color-base-oklch: oklch(47.4% 0.090 252.6);
  --color-50: #F3F7FB;
  --color-100: #E1EAF5;
  --color-200: #C4D5E9;
  --color-300: #9AB6D5;
  --color-400: #7396BF;
  --color-500: #5278A3;
  --color-600: #445F7E;
  --color-700: #35465A;
  --color-800: #25303C;
  --color-900: #181E25;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  lapis-lazuli: {
    50: '#F3F7FB',
    100: '#E1EAF5',
    200: '#C4D5E9',
    300: '#9AB6D5',
    400: '#7396BF',
    500: '#5278A3',
    600: '#445F7E',
    700: '#35465A',
    800: '#25303C',
    900: '#181E25',
  },
}

$base: #345E8D;
$base-ink: #FFFFFF;
$base-50: #F3F7FB;
$base-100: #E1EAF5;
$base-200: #C4D5E9;
$base-300: #9AB6D5;
$base-400: #7396BF;
$base-500: #5278A3;
$base-600: #445F7E;
$base-700: #35465A;
$base-800: #25303C;
$base-900: #181E25;
$base-hover: #2A4B71;
$base-subtle: #BFCEE0;

{
    "color": {
        "base": {
            "value": "#345E8D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F7FB",
                "type": "color"
            },
            "100": {
                "value": "#E1EAF5",
                "type": "color"
            },
            "200": {
                "value": "#C4D5E9",
                "type": "color"
            },
            "300": {
                "value": "#9AB6D5",
                "type": "color"
            },
            "400": {
                "value": "#7396BF",
                "type": "color"
            },
            "500": {
                "value": "#5278A3",
                "type": "color"
            },
            "600": {
                "value": "#445F7E",
                "type": "color"
            },
            "700": {
                "value": "#35465A",
                "type": "color"
            },
            "800": {
                "value": "#25303C",
                "type": "color"
            },
            "900": {
                "value": "#181E25",
                "type": "color"
            }
        }
    }
}

Palettes built on #345E8D

Color Lab

Pairs with #345E8D

UI roles & guardrails

In real applications

Scales

Every model

Export