What color is #151A90?

#151A90 is a dark, vivid blue. In RGB it is rgb(21, 26, 144), and in HSL hsl(238, 75%, 32%).

Is #151A90 accessible as text?

On white, #151A90 has a contrast ratio of 13.27:1 (passes WCAG AA for body text); on black it is 1.58:1 (fails). For text placed on #151A90, use white for the best readability.

What is the closest Tailwind color to #151A90?

The nearest Tailwind CSS token is indigo-900 (#312C85).

What colors go well with #151A90?

#151A90 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #8F8B14. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #151A90 below.

Is #151A90 good for buttons?

#151A90 works well for buttons and highlights, but use white text on #151A90 — black text only reaches 1.58:1, below the 4.5:1 needed for normal-size labels.

Is #151A90 the same as CSS darkblue?

No — #151A90 is not the CSS named color darkblue, but darkblue (#00008B) is the closest CSS named color.

#151A90 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #151A90

Not just a swatch — here's how #151A90 works with other colors. Named schemes with #151A90 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #151A90 Anchor #141210 Accent #DC9659 Secondary #252933 Surface #F4ECE3

Phthalo 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 #151A90 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #1A004D

Phthalo 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 Phthalo Blue.

Coastal Morning Lead · 5 colors

Lead #151A90 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Phthalo 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 #151A90 Secondary #7F4535 Surface #EED7C2 Accent #365246 Anchor #58223A

Phthalo 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 #151A90 Secondary #4A587E Support #9D8F88 Ink #18140F

Phthalo 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 Phthalo Blue carrying the quiet middle.

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Color Lab

How #151A90 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 11/100

Cool

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

Softness 23/100

Low

Firm and assertive — carries weight and contrast.

Depth 71/100

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 21/100

Low

Clean and current — no dusty, aged cast.

Luxury 66/100

High

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

Brand distinctiveness 71/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 45/100

Moderate

Workable accent with care around contrast.

Surface fit 19/100

Very low

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

Print safety 68/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #151A90

For UI

For branding

For interior

For fashion

People also use #151A90 with

True Blue Indigo Olive 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 13.3:1. Use

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

Avoid beside #39148F — 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 #151A90 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: #151A90;
  --color-base-rgb: 21 26 144;
  --color-base-oklch: oklch(32.6% 0.184 268.7);
  --color-50: #F1F1FE;
  --color-100: #DADBFB;
  --color-200: #B8BAF5;
  --color-300: #878AE8;
  --color-400: #5B5FD7;
  --color-500: #383DBC;
  --color-600: #323590;
  --color-700: #292B66;
  --color-800: #1E2042;
  --color-900: #141529;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  phthalo-blue: {
    50: '#F1F1FE',
    100: '#DADBFB',
    200: '#B8BAF5',
    300: '#878AE8',
    400: '#5B5FD7',
    500: '#383DBC',
    600: '#323590',
    700: '#292B66',
    800: '#1E2042',
    900: '#141529',
  },
}

$base: #151A90;
$base-ink: #FFFFFF;
$base-50: #F1F1FE;
$base-100: #DADBFB;
$base-200: #B8BAF5;
$base-300: #878AE8;
$base-400: #5B5FD7;
$base-500: #383DBC;
$base-600: #323590;
$base-700: #292B66;
$base-800: #1E2042;
$base-900: #141529;
$base-hover: #101472;
$base-subtle: #ADAFE9;

{
    "color": {
        "base": {
            "value": "#151A90",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F1FE",
                "type": "color"
            },
            "100": {
                "value": "#DADBFB",
                "type": "color"
            },
            "200": {
                "value": "#B8BAF5",
                "type": "color"
            },
            "300": {
                "value": "#878AE8",
                "type": "color"
            },
            "400": {
                "value": "#5B5FD7",
                "type": "color"
            },
            "500": {
                "value": "#383DBC",
                "type": "color"
            },
            "600": {
                "value": "#323590",
                "type": "color"
            },
            "700": {
                "value": "#292B66",
                "type": "color"
            },
            "800": {
                "value": "#1E2042",
                "type": "color"
            },
            "900": {
                "value": "#141529",
                "type": "color"
            }
        }
    }
}

Palettes built on #151A90

Color Lab

Pairs with #151A90

UI roles & guardrails

In real applications

Scales

Every model

Export