What color is #153F6C?

#153F6C is a dark blue. In RGB it is rgb(21, 63, 108), and in HSL hsl(211, 67%, 25%).

Is #153F6C accessible as text?

On white, #153F6C has a contrast ratio of 10.72:1 (passes WCAG AA for body text); on black it is 1.96:1 (fails). For text placed on #153F6C, use white for the best readability.

What is the closest Tailwind color to #153F6C?

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

What colors go well with #153F6C?

#153F6C pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #6A4115. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #153F6C below.

Is #153F6C good for buttons?

#153F6C works well for buttons and highlights, but use white text on #153F6C — black text only reaches 1.96:1, below the 4.5:1 needed for normal-size labels.

Is #153F6C the same as CSS darkslateblue?

No — #153F6C is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#153F6C Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #153F6C

Not just a swatch — here's how #153F6C works with other colors. Named schemes with #153F6C in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #153F6C 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 #153F6C Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A6 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 #153F6C Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #3C618C

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 #153F6C Secondary #7F4537 Surface #E1DDC1 Accent #375246 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 #153F6C Secondary #586676 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 #153F6C 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 25/100

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 44/100

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 35/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 56/100

Moderate

Workable accent with care around contrast.

Surface fit 34/100

Low

Usable as a tinted surface in measured doses.

Print safety 81/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #153F6C

For UI

For branding

For interior

For fashion

People also use #153F6C 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 10.7:1. Use

Subtle surface Use #C6D8EB for cards and hover fills. Tint 80

Avoid beside #15226A — 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 #153F6C 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: #153F6C;
  --color-base-rgb: 21 63 108;
  --color-base-oklch: oklch(36.4% 0.090 252.9);
  --color-50: #F2F7FD;
  --color-100: #DCEAF9;
  --color-200: #BBD5F1;
  --color-300: #8CB6E3;
  --color-400: #6297D0;
  --color-500: #3F78B5;
  --color-600: #37608B;
  --color-700: #2C4662;
  --color-800: #203041;
  --color-900: #161E28;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F2F7FD',
    100: '#DCEAF9',
    200: '#BBD5F1',
    300: '#8CB6E3',
    400: '#6297D0',
    500: '#3F78B5',
    600: '#37608B',
    700: '#2C4662',
    800: '#203041',
    900: '#161E28',
  },
}

$base: #153F6C;
$base-ink: #FFFFFF;
$base-50: #F2F7FD;
$base-100: #DCEAF9;
$base-200: #BBD5F1;
$base-300: #8CB6E3;
$base-400: #6297D0;
$base-500: #3F78B5;
$base-600: #37608B;
$base-700: #2C4662;
$base-800: #203041;
$base-900: #161E28;
$base-hover: #113255;
$base-subtle: #A8C5E3;

{
    "color": {
        "base": {
            "value": "#153F6C",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F7FD",
                "type": "color"
            },
            "100": {
                "value": "#DCEAF9",
                "type": "color"
            },
            "200": {
                "value": "#BBD5F1",
                "type": "color"
            },
            "300": {
                "value": "#8CB6E3",
                "type": "color"
            },
            "400": {
                "value": "#6297D0",
                "type": "color"
            },
            "500": {
                "value": "#3F78B5",
                "type": "color"
            },
            "600": {
                "value": "#37608B",
                "type": "color"
            },
            "700": {
                "value": "#2C4662",
                "type": "color"
            },
            "800": {
                "value": "#203041",
                "type": "color"
            },
            "900": {
                "value": "#161E28",
                "type": "color"
            }
        }
    }
}