What color is #2B375F?

#2B375F is a dark blue. In RGB it is rgb(43, 55, 95), and in HSL hsl(226, 38%, 27%).

Is #2B375F accessible as text?

On white, #2B375F has a contrast ratio of 11.57:1 (passes WCAG AA for body text); on black it is 1.81:1 (fails). For text placed on #2B375F, use white for the best readability.

What is the closest Tailwind color to #2B375F?

The nearest Tailwind CSS token is mauve-700 (#463947).

What colors go well with #2B375F?

#2B375F pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5F532B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #2B375F below.

Is #2B375F good for buttons?

#2B375F works well for buttons and highlights, but use white text on #2B375F — black text only reaches 1.81:1, below the 4.5:1 needed for normal-size labels.

Is #2B375F the same as CSS darkslateblue?

No — #2B375F is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#2B375F Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #2B375F

Not just a swatch — here's how #2B375F works with other colors. Named schemes with #2B375F in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #2B375F Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Yale Blue 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 #2B375F Secondary #AEB4B8 Surface #F1F2F0 Support #7D92A7 Anchor #2E3236

Yale Blue 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 #2B375F Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #4B587F

Yale 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 Yale Blue.

Vintage Leather Lead · 5 colors

Lead #2B375F Secondary #7F4535 Surface #EED7C2 Accent #365246 Anchor #582239

Yale 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 #2B375F Secondary #5A5F6E Support #9D8F88 Ink #18140F

Yale 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 Yale Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #2B375F 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 34/100

Cool

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

Softness 33/100

Low

Middle-weight — neither delicate nor heavy.

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 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 28/100

Low

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

UI accent fit 46/100

Moderate

Workable accent with care around contrast.

Surface fit 41/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 88/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #2B375F

For UI

For branding

For interior

For fashion

People also use #2B375F with

Teal Blue Russian Violet Army Green 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 11.6:1. Use

Subtle surface Use #D0D4E4 for cards and hover fills. Tint 80

Avoid beside #302B5F — 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 #2B375F 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: #2B375F;
  --color-base-rgb: 43 55 95;
  --color-base-oklch: oklch(34.7% 0.072 269.8);
  --color-50: #F4F6FB;
  --color-100: #E2E6F3;
  --color-200: #C7CEE6;
  --color-300: #9FABD0;
  --color-400: #7A88B8;
  --color-500: #59699C;
  --color-600: #495479;
  --color-700: #383F57;
  --color-800: #272C3A;
  --color-900: #191C24;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F4F6FB',
    100: '#E2E6F3',
    200: '#C7CEE6',
    300: '#9FABD0',
    400: '#7A88B8',
    500: '#59699C',
    600: '#495479',
    700: '#383F57',
    800: '#272C3A',
    900: '#191C24',
  },
}

$base: #2B375F;
$base-ink: #FFFFFF;
$base-50: #F4F6FB;
$base-100: #E2E6F3;
$base-200: #C7CEE6;
$base-300: #9FABD0;
$base-400: #7A88B8;
$base-500: #59699C;
$base-600: #495479;
$base-700: #383F57;
$base-800: #272C3A;
$base-900: #191C24;
$base-hover: #222C4C;
$base-subtle: #B7BFD7;

{
    "color": {
        "base": {
            "value": "#2B375F",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F6FB",
                "type": "color"
            },
            "100": {
                "value": "#E2E6F3",
                "type": "color"
            },
            "200": {
                "value": "#C7CEE6",
                "type": "color"
            },
            "300": {
                "value": "#9FABD0",
                "type": "color"
            },
            "400": {
                "value": "#7A88B8",
                "type": "color"
            },
            "500": {
                "value": "#59699C",
                "type": "color"
            },
            "600": {
                "value": "#495479",
                "type": "color"
            },
            "700": {
                "value": "#383F57",
                "type": "color"
            },
            "800": {
                "value": "#272C3A",
                "type": "color"
            },
            "900": {
                "value": "#191C24",
                "type": "color"
            }
        }
    }
}

Palettes built on #2B375F

Color Lab

Pairs with #2B375F

UI roles & guardrails

In real applications

Scales

Every model

Export