What color is #213970?

#213970 is a dark blue. In RGB it is rgb(33, 57, 112), and in HSL hsl(222, 54%, 28%).

Is #213970 accessible as text?

On white, #213970 has a contrast ratio of 11.15:1 (passes WCAG AA for body text); on black it is 1.88:1 (fails). For text placed on #213970, use white for the best readability.

What is the closest Tailwind color to #213970?

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

What colors go well with #213970?

#213970 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #6E5721. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #213970 below.

Is #213970 good for buttons?

#213970 works well for buttons and highlights, but use white text on #213970 — black text only reaches 1.88:1, below the 4.5:1 needed for normal-size labels.

Is #213970 the same as CSS darkslateblue?

No — #213970 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#213970 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #213970

Not just a swatch — here's how #213970 works with other colors. Named schemes with #213970 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #213970 Accent #A5C4C2 Surface #DDDBBF 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.

Luxury Packaging Feature · 5 colors

Feature #213970 Anchor #141210 Accent #ACAE53 Secondary #242933 Surface #F0EEE3

Yale 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 #213970 Anchor #2A2A2E Secondary #6E6E74 Surface #E9E7DA Accent #1B183E

Yale 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 Yale Blue.

Vintage Leather Lead · 5 colors

Lead #213970 Secondary #7F4536 Surface #EED7C2 Accent #375246 Anchor #57223A

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 #213970 Secondary #586377 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 #213970 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 26/100

Cool

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

Softness 32/100

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 42/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 69/100

High

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

Brand distinctiveness 38/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 56/100

Moderate

Workable accent with care around contrast.

Surface fit 31/100

Low

Usable as a tinted surface in measured doses.

Print safety 82/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #213970

For UI

For branding

For interior

For fashion

People also use #213970 with

Teal Midnight Blue Coffee 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 11.1:1. Use

Subtle surface Use #CCD5E9 for cards and hover fills. Tint 80

Avoid beside #23216E — 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 #213970 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: #213970;
  --color-base-rgb: 33 57 112;
  --color-base-oklch: oklch(35.7% 0.100 264.2);
  --color-50: #F3F6FC;
  --color-100: #DFE6F6;
  --color-200: #C0CDEC;
  --color-300: #95AADA;
  --color-400: #6C87C6;
  --color-500: #4B67AA;
  --color-600: #3F5383;
  --color-700: #323F5D;
  --color-800: #232B3D;
  --color-900: #171C26;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F3F6FC',
    100: '#DFE6F6',
    200: '#C0CDEC',
    300: '#95AADA',
    400: '#6C87C6',
    500: '#4B67AA',
    600: '#3F5383',
    700: '#323F5D',
    800: '#232B3D',
    900: '#171C26',
  },
}

$base: #213970;
$base-ink: #FFFFFF;
$base-50: #F3F6FC;
$base-100: #DFE6F6;
$base-200: #C0CDEC;
$base-300: #95AADA;
$base-400: #6C87C6;
$base-500: #4B67AA;
$base-600: #3F5383;
$base-700: #323F5D;
$base-800: #232B3D;
$base-900: #171C26;
$base-hover: #1A2D58;
$base-subtle: #B1BFDF;

{
    "color": {
        "base": {
            "value": "#213970",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F6FC",
                "type": "color"
            },
            "100": {
                "value": "#DFE6F6",
                "type": "color"
            },
            "200": {
                "value": "#C0CDEC",
                "type": "color"
            },
            "300": {
                "value": "#95AADA",
                "type": "color"
            },
            "400": {
                "value": "#6C87C6",
                "type": "color"
            },
            "500": {
                "value": "#4B67AA",
                "type": "color"
            },
            "600": {
                "value": "#3F5383",
                "type": "color"
            },
            "700": {
                "value": "#323F5D",
                "type": "color"
            },
            "800": {
                "value": "#232B3D",
                "type": "color"
            },
            "900": {
                "value": "#171C26",
                "type": "color"
            }
        }
    }
}