What color is #345C8D?

#345C8D is a dark blue. In RGB it is rgb(52, 92, 141), and in HSL hsl(213, 46%, 38%).

Is #345C8D accessible as text?

On white, #345C8D has a contrast ratio of 6.86:1 (passes WCAG AA for body text); on black it is 3.06:1 (fails). For text placed on #345C8D, use white for the best readability.

What is the closest Tailwind color to #345C8D?

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

What colors go well with #345C8D?

#345C8D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #8D6534. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #345C8D below.

Is #345C8D good for buttons?

#345C8D works well for buttons and highlights, but use white text on #345C8D — black text only reaches 3.06:1, below the 4.5:1 needed for normal-size labels.

Is #345C8D the same as CSS darkslateblue?

No — #345C8D is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#345C8D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #345C8D

Not just a swatch — here's how #345C8D works with other colors. Named schemes with #345C8D in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #345C8D 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 #345C8D 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 #345C8D Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5A7FAE

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 #345C8D Secondary #7F4537 Surface #E1DDC1 Accent #375246 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 #345C8D Secondary #768496 Support #9D8F89 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 #345C8D 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 41/100

Moderate

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 53/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 59/100

Moderate

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 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 #345C8D

For UI

For branding

For interior

For fashion

People also use #345C8D 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 6.9:1. Use

Subtle surface Use #D5DEEA for cards and hover fills. Tint 80

Avoid beside #343F8D — 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 #345C8D 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: #345C8D;
  --color-base-rgb: 52 92 141;
  --color-base-oklch: oklch(46.9% 0.092 254.5);
  --color-50: #F3F7FB;
  --color-100: #E1EAF5;
  --color-200: #C4D4E9;
  --color-300: #9AB5D5;
  --color-400: #7395BF;
  --color-500: #5276A3;
  --color-600: #445E7E;
  --color-700: #35465A;
  --color-800: #252F3C;
  --color-900: #181E25;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  lapis-lazuli: {
    50: '#F3F7FB',
    100: '#E1EAF5',
    200: '#C4D4E9',
    300: '#9AB5D5',
    400: '#7395BF',
    500: '#5276A3',
    600: '#445E7E',
    700: '#35465A',
    800: '#252F3C',
    900: '#181E25',
  },
}

$base: #345C8D;
$base-ink: #FFFFFF;
$base-50: #F3F7FB;
$base-100: #E1EAF5;
$base-200: #C4D4E9;
$base-300: #9AB5D5;
$base-400: #7395BF;
$base-500: #5276A3;
$base-600: #445E7E;
$base-700: #35465A;
$base-800: #252F3C;
$base-900: #181E25;
$base-hover: #2A4A71;
$base-subtle: #BFCEE0;

{
    "color": {
        "base": {
            "value": "#345C8D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F7FB",
                "type": "color"
            },
            "100": {
                "value": "#E1EAF5",
                "type": "color"
            },
            "200": {
                "value": "#C4D4E9",
                "type": "color"
            },
            "300": {
                "value": "#9AB5D5",
                "type": "color"
            },
            "400": {
                "value": "#7395BF",
                "type": "color"
            },
            "500": {
                "value": "#5276A3",
                "type": "color"
            },
            "600": {
                "value": "#445E7E",
                "type": "color"
            },
            "700": {
                "value": "#35465A",
                "type": "color"
            },
            "800": {
                "value": "#252F3C",
                "type": "color"
            },
            "900": {
                "value": "#181E25",
                "type": "color"
            }
        }
    }
}

Palettes built on #345C8D

Color Lab

Pairs with #345C8D

UI roles & guardrails

In real applications

Scales

Every model

Export