What color is #153D64?

#153D64 is a dark blue. In RGB it is rgb(21, 61, 100), and in HSL hsl(210, 65%, 24%).

Is #153D64 accessible as text?

On white, #153D64 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 #153D64, use white for the best readability.

What is the closest Tailwind color to #153D64?

The nearest Tailwind CSS token is sky-900 (#024A70).

What colors go well with #153D64?

#153D64 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #653D15. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #153D64 below.

Is #153D64 good for buttons?

#153D64 works well for buttons and highlights, but use white text on #153D64 — black text only reaches 1.88:1, below the 4.5:1 needed for normal-size labels.

Is #153D64 the same as CSS darkslategray?

No — #153D64 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#153D64 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #153D64

Not just a swatch — here's how #153D64 works with other colors. Named schemes with #153D64 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #153D64 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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 #153D64 Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 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 #153D64 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #3B5E84

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 #153D64 Secondary #7F4537 Surface #E1DDC0 Accent #375245 Anchor #57233B

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 #F6F4EF Accent #153D64 Secondary #566371 Support #959386 Ink #16140F

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 #153D64 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 27/100

Cool

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

Softness 33/100

Low

Middle-weight — neither delicate nor heavy.

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 31/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 51/100

Moderate

Workable accent with care around contrast.

Surface fit 37/100

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 #153D64

For UI

For branding

For interior

For fashion

People also use #153D64 with

Dark Cyan Midnight Blue Sepia 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 11.2:1. Use

Subtle surface Use #C6D8EA for cards and hover fills. Tint 80

Avoid beside #152365 — 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 #153D64 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: #153D64;
  --color-base-rgb: 21 61 100;
  --color-base-oklch: oklch(35.3% 0.081 250.8);
  --color-50: #F2F7FD;
  --color-100: #DDEBF9;
  --color-200: #BCD6F1;
  --color-300: #8EB8E2;
  --color-400: #6399CF;
  --color-500: #417AB4;
  --color-600: #386189;
  --color-700: #2D4762;
  --color-800: #213040;
  --color-900: #161F27;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F2F7FD',
    100: '#DDEBF9',
    200: '#BCD6F1',
    300: '#8EB8E2',
    400: '#6399CF',
    500: '#417AB4',
    600: '#386189',
    700: '#2D4762',
    800: '#213040',
    900: '#161F27',
  },
}

$base: #153D64;
$base-ink: #FFFFFF;
$base-50: #F2F7FD;
$base-100: #DDEBF9;
$base-200: #BCD6F1;
$base-300: #8EB8E2;
$base-400: #6399CF;
$base-500: #417AB4;
$base-600: #386189;
$base-700: #2D4762;
$base-800: #213040;
$base-900: #161F27;
$base-hover: #113151;
$base-subtle: #A8C5E2;

{
    "color": {
        "base": {
            "value": "#153D64",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F7FD",
                "type": "color"
            },
            "100": {
                "value": "#DDEBF9",
                "type": "color"
            },
            "200": {
                "value": "#BCD6F1",
                "type": "color"
            },
            "300": {
                "value": "#8EB8E2",
                "type": "color"
            },
            "400": {
                "value": "#6399CF",
                "type": "color"
            },
            "500": {
                "value": "#417AB4",
                "type": "color"
            },
            "600": {
                "value": "#386189",
                "type": "color"
            },
            "700": {
                "value": "#2D4762",
                "type": "color"
            },
            "800": {
                "value": "#213040",
                "type": "color"
            },
            "900": {
                "value": "#161F27",
                "type": "color"
            }
        }
    }
}