What color is #2B397D?

#2B397D is a dark blue. In RGB it is rgb(43, 57, 125), and in HSL hsl(230, 49%, 33%).

Is #2B397D accessible as text?

On white, #2B397D has a contrast ratio of 10.58:1 (passes WCAG AA for body text); on black it is 1.98:1 (fails). For text placed on #2B397D, use white for the best readability.

What is the closest Tailwind color to #2B397D?

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

What colors go well with #2B397D?

#2B397D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #7D702B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #2B397D below.

Is #2B397D good for buttons?

#2B397D works well for buttons and highlights, but use white text on #2B397D — black text only reaches 1.98:1, below the 4.5:1 needed for normal-size labels.

Is #2B397D the same as CSS darkslateblue?

No — #2B397D is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#2B397D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #2B397D

Not just a swatch — here's how #2B397D works with other colors. Named schemes with #2B397D in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #2B397D Anchor #141210 Accent #DC9659 Secondary #252833 Surface #F3ECE3

Dark Slate Blue carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Moody Editorial Color · 5 colors

Color #2B397D Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #221946

Dark Slate Blue adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Dark Slate Blue.

Coastal Morning Lead · 5 colors

Lead #2B397D 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.

Vintage Leather Lead · 5 colors

Lead #2B397D 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.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #2B397D Secondary #5E667F Support #9D8F88 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.

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Color Lab

How #2B397D 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 24/100

Cool

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

Softness 31/100

Low

Firm and assertive — carries weight and contrast.

Depth 63/100

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 41/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 68/100

High

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

Brand distinctiveness 45/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 64/100

High

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

Surface fit 25/100

Low

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

Print safety 80/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #2B397D

For UI

For branding

For interior

For fashion

People also use #2B397D with

Teal Blue Dark Slate Blue Olive Brown 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 10.6:1. Use

Subtle surface Use #D1D5E9 for cards and hover fills. Tint 80

Avoid beside #392B7D — 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 #2B397D 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: #2B397D;
  --color-base-rgb: 43 57 125;
  --color-base-oklch: oklch(37.3% 0.116 271.0);
  --color-50: #F3F5FB;
  --color-100: #E0E4F5;
  --color-200: #C2C9EA;
  --color-300: #98A3D7;
  --color-400: #707EC2;
  --color-500: #4F5EA6;
  --color-600: #424D7F;
  --color-700: #343A5B;
  --color-800: #25293C;
  --color-900: #181A25;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-blue: {
    50: '#F3F5FB',
    100: '#E0E4F5',
    200: '#C2C9EA',
    300: '#98A3D7',
    400: '#707EC2',
    500: '#4F5EA6',
    600: '#424D7F',
    700: '#343A5B',
    800: '#25293C',
    900: '#181A25',
  },
}

$base: #2B397D;
$base-ink: #FFFFFF;
$base-50: #F3F5FB;
$base-100: #E0E4F5;
$base-200: #C2C9EA;
$base-300: #98A3D7;
$base-400: #707EC2;
$base-500: #4F5EA6;
$base-600: #424D7F;
$base-700: #343A5B;
$base-800: #25293C;
$base-900: #181A25;
$base-hover: #222D64;
$base-subtle: #B9BFDF;

{
    "color": {
        "base": {
            "value": "#2B397D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F5FB",
                "type": "color"
            },
            "100": {
                "value": "#E0E4F5",
                "type": "color"
            },
            "200": {
                "value": "#C2C9EA",
                "type": "color"
            },
            "300": {
                "value": "#98A3D7",
                "type": "color"
            },
            "400": {
                "value": "#707EC2",
                "type": "color"
            },
            "500": {
                "value": "#4F5EA6",
                "type": "color"
            },
            "600": {
                "value": "#424D7F",
                "type": "color"
            },
            "700": {
                "value": "#343A5B",
                "type": "color"
            },
            "800": {
                "value": "#25293C",
                "type": "color"
            },
            "900": {
                "value": "#181A25",
                "type": "color"
            }
        }
    }
}

Palettes built on #2B397D

Color Lab

Pairs with #2B397D

UI roles & guardrails

In real applications

Scales

Every model

Export