Still Lake Blue

SaaS dashboards & corporate sites · Score 86 ·Curated

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10 colour roles

Every colour has a defined purpose. Use the buttons on the right to copy it in any format.

Primary primary

Brand colour, mapped to the CSS variable --color-primary

#2563ebrgb(37, 99, 235)hsl(221.2, 83.2%, 53.3%)

Primary hover primaryHover

Hover state: --color-primary-hover

#1d4ed8rgb(29, 78, 216)hsl(224.3, 76.3%, 48%)

Primary active primaryActive

Pressed state: --color-primary-active

#1e40afrgb(30, 64, 175)hsl(225.9, 70.7%, 40.2%)

Text main textMain

Body text: --color-text-main

#0f172argb(15, 23, 42)hsl(222.2, 47.4%, 11.2%)

Text sub textSub

Secondary text: --color-text-sub

#64748brgb(100, 116, 139)hsl(215.4, 16.3%, 46.9%)

Background bg

Page background: --color-bg

#ffffffrgb(255, 255, 255)hsl(0, 0%, 100%)

Surface surface

Card and panel background: --color-surface

#f8fafcrgb(248, 250, 252)hsl(210, 40%, 98%)

Border border

Dividers and outlines: --color-border

#e2e8f0rgb(226, 232, 240)hsl(214.3, 31.8%, 91.4%)

Link link

Link colour: --color-link

#0b41b9rgb(11, 65, 185)hsl(221.4, 88.8%, 38.4%)

Accent accent

Highlight colour: --color-accent

#f59e0brgb(245, 158, 11)hsl(37.7, 92.1%, 50.2%)

How to use it

Written by hand for the hue family and lightness of this palette, not assembled from a template.

The lead colour sits in the middle of the lightness range, which makes it the most adaptable: both light and dark themes are easy to build on.

Good forThe most versatile lead: technology, finance, tools and enterprise services that need to feel trustworthy.

Use with careIt is so common that it can feel anonymous; support colours and typography have to do the differentiating.

Pairs withDeeper blue for depth and white for openness are the two hardest combinations to get wrong.

Hue family: Blue

What it looks like in a real interface

The same palette rendered across all three platforms — the fastest way to judge whether it works.

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Primary actionLearn more

Card oneSecondary copy, used to check contrast against WCAG.

Card twoAccent colour for highlights — keep it a step away from the brand colour.

Card threeNeutral text carries body copy, the most frequently used colour.

Accessibility contrast check

Calculated to WCAG 2.1. AA is the accessibility baseline, AAA the enhanced level.

Foreground / background	Ratio	Body text	Large text
Body text / page background	17.85:1	AAA	AAA
Body text / card background	17.06:1	AAA	AAA
Brand colour / page background	5.17:1	AAA	AAA

Export to your project

Four formats, ready to paste. Or fetch them by URL from your tooling or AI agent.

CSS variables

:root {
  --color-primary: #2563eb; /* Primary */
  --color-primaryHover: #1d4ed8; /* Primary hover */
  --color-primaryActive: #1e40af; /* Primary active */
  --color-textMain: #0f172a; /* Text main */
  --color-textSub: #64748b; /* Text sub */
  --color-bg: #ffffff; /* Background */
  --color-surface: #f8fafc; /* Surface */
  --color-border: #e2e8f0; /* Border */
  --color-link: #0b41b9; /* Link */
  --color-accent: #f59e0b; /* Accent */
}

SCSS variables

$color-primary: #2563eb; // Primary
$color-primaryHover: #1d4ed8; // Primary hover
$color-primaryActive: #1e40af; // Primary active
$color-textMain: #0f172a; // Text main
$color-textSub: #64748b; // Text sub
$color-bg: #ffffff; // Background
$color-surface: #f8fafc; // Surface
$color-border: #e2e8f0; // Border
$color-link: #0b41b9; // Link
$color-accent: #f59e0b; // Accent

Tailwind config

// tailwind.config.js: Still Lake Blue
module.exports = {
  theme: {
    extend: {
      colors: {
        'primary': '#2563eb',
        'primaryHover': '#1d4ed8',
        'primaryActive': '#1e40af',
        'textMain': '#0f172a',
        'textSub': '#64748b',
        'bg': '#ffffff',
        'surface': '#f8fafc',
        'border': '#e2e8f0',
        'link': '#0b41b9',
        'accent': '#f59e0b',
      },
    },
  },
};

Machine-readable JSON

{
  "name": "Still Lake Blue",
  "platform": "web",
  "tags": [
    "Business",
    "Minimal",
    "SaaS"
  ],
  "advice": {
    "family": "Blue",
    "depth": "The lead colour sits in the middle of the lightness range, which makes it the most adaptable: both light and dark themes are easy to build on.",
    "muted": null,
    "suit": "The most versatile lead: technology, finance, tools and enterprise services that need to feel trustworthy.",
    "avoid": "It is so common that it can feel anonymous; support colours and typography have to do the differentiating.",
    "pair": "Deeper blue for depth and white for openness are the two hardest combinations to get wrong."
  },
  "roles": {
    "primary": "#2563eb",
    "primaryHover": "#1d4ed8",
    "primaryActive": "#1e40af",
    "textMain": "#0f172a",
    "textSub": "#64748b",
    "bg": "#ffffff",
    "surface": "#f8fafc",
    "border": "#e2e8f0",
    "link": "#0b41b9",
    "accent": "#f59e0b"
  },
  "contrast": {
    "textOnBg": {
      "ratio": 17.85,
      "level": "AAA"
    },
    "primaryOnBg": {
      "ratio": 5.17,
      "level": "AAA"
    },
    "textOnSurface": {
      "ratio": 17.06,
      "level": "AAA"
    }
  }
}

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