What color is #2F348E?

#2F348E is a dark blue-violet. In RGB it is rgb(47, 52, 142), and in HSL hsl(237, 50%, 37%).

Is #2F348E accessible as text?

On white, #2F348E has a contrast ratio of 10.49:1 (passes WCAG AA for body text); on black it is 2.00:1 (fails). For text placed on #2F348E, use white for the best readability.

What is the closest Tailwind color to #2F348E?

The nearest Tailwind CSS token is blue-900 (#1C398E).

What colors go well with #2F348E?

#2F348E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #8E892F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #2F348E below.

Is #2F348E good for buttons?

#2F348E works well for buttons and highlights, but use white text on #2F348E — black text only reaches 2.00:1, below the 4.5:1 needed for normal-size labels.

Is #2F348E the same as CSS darkslateblue?

No — #2F348E is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#2F348E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #2F348E

Not just a swatch — here's how #2F348E works with other colors. Named schemes with #2F348E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #2F348E Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Dark Slate Blue 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 #2F348E Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #4E5AAD

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

Vintage Leather Lead · 5 colors

Lead #2F348E Secondary #7F4535 Surface #EED7C2 Accent #365247 Anchor #582239

Dark Slate Blue 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 #2F348E Surface #F6E5D8 Anchor #5B2143 Accent #E5C2C9 Secondary #322B2F

Dark Slate Blue 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 #2F348E Secondary #606787 Support #9D9088 Ink #18140F

Dark Slate Blue 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 Dark Slate Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #2F348E 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 19/100

Cool

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

Softness 29/100

Low

Firm and assertive — carries weight and contrast.

Depth 64/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 34/100

Low

A faint retro warmth without tipping into sepia.

Luxury 65/100

High

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

Brand distinctiveness 40/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 68/100

High

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

Surface fit 16/100

Very low

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

Print safety 76/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #2F348E

For UI

For branding

For interior

For fashion

People also use #2F348E with

Steel Blue Rebecca Purple Olive Gainsboro Prussian Blue

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 10.5:1. Use

Subtle surface Use #D3D4EA for cards and hover fills. Tint 80

Avoid beside #4A2F8E — 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 #2F348E 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: #2F348E;
  --color-base-rgb: 47 52 142;
  --color-base-oklch: oklch(38.0% 0.146 274.6);
  --color-50: #F3F4FC;
  --color-100: #E0E1F5;
  --color-200: #C2C4EB;
  --color-300: #979BD8;
  --color-400: #7074C2;
  --color-500: #4E53A6;
  --color-600: #424580;
  --color-700: #33355C;
  --color-800: #24263C;
  --color-900: #181925;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-blue: {
    50: '#F3F4FC',
    100: '#E0E1F5',
    200: '#C2C4EB',
    300: '#979BD8',
    400: '#7074C2',
    500: '#4E53A6',
    600: '#424580',
    700: '#33355C',
    800: '#24263C',
    900: '#181925',
  },
}

$base: #2F348E;
$base-ink: #FFFFFF;
$base-50: #F3F4FC;
$base-100: #E0E1F5;
$base-200: #C2C4EB;
$base-300: #979BD8;
$base-400: #7074C2;
$base-500: #4E53A6;
$base-600: #424580;
$base-700: #33355C;
$base-800: #24263C;
$base-900: #181925;
$base-hover: #262A71;
$base-subtle: #BCBEE1;

{
    "color": {
        "base": {
            "value": "#2F348E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F4FC",
                "type": "color"
            },
            "100": {
                "value": "#E0E1F5",
                "type": "color"
            },
            "200": {
                "value": "#C2C4EB",
                "type": "color"
            },
            "300": {
                "value": "#979BD8",
                "type": "color"
            },
            "400": {
                "value": "#7074C2",
                "type": "color"
            },
            "500": {
                "value": "#4E53A6",
                "type": "color"
            },
            "600": {
                "value": "#424580",
                "type": "color"
            },
            "700": {
                "value": "#33355C",
                "type": "color"
            },
            "800": {
                "value": "#24263C",
                "type": "color"
            },
            "900": {
                "value": "#181925",
                "type": "color"
            }
        }
    }
}

Palettes built on #2F348E

Color Lab

Pairs with #2F348E

UI roles & guardrails

In real applications

Scales

Every model

Export