What are the hex codes in the Cool Sky Blue & Slate palette?

The Cool Sky Blue & Slate color palette consists of Iron #363F44, Slate #6D7D87, Sky Blue #98D5E2, Frost #E1F2F6.

How should I use the Cool Sky Blue & Slate palette on a website?

Use Frost #E1F2F6 as the background, Iron #363F44 for text, Sky Blue #98D5E2 for buttons and links, and Slate #6D7D87 for accents. 2 of 6 color pairs pass WCAG AA (4.5:1); the strongest is Iron on Frost at 9.34:1.

Which colors in Cool Sky Blue & Slate have enough contrast for text?

The highest-contrast pair is #363F44 on #E1F2F6 with a ratio of 9.34:1, which passes WCAG AA for normal text.

#363F44Iron

#6D7D87Slate

#98D5E2Sky Blue

#E1F2F6Frost

Cool Sky Blue & Slate color palette

Minimal Gray White

Color codes click any value to copy

Name	HEX	RGB	HSL	OKLCH
Iron	`#363F44`	`rgb(54, 63, 68)`	`hsl(201, 11%, 24%)`	`oklch(36.1% 0.015 232)`
Slate	`#6D7D87`	`rgb(109, 125, 135)`	`hsl(203, 11%, 48%)`	`oklch(58.0% 0.024 235)`
Sky Blue	`#98D5E2`	`rgb(152, 213, 226)`	`hsl(191, 56%, 74%)`	`oklch(83.6% 0.065 212)`
Frost	`#E1F2F6`	`rgb(225, 242, 246)`	`hsl(191, 54%, 92%)`	`oklch(95.0% 0.019 213)`

Why it works and how to use it

Cool Sky Blue & Slate is a monochromatic color palette tagged minimal, gray, white. All four colors sit within 0° of hue, so the scheme reads as one color explored across light and dark. Neither washed out nor loud, it adapts to most contexts. The overall temperature is cool.

It works because the lightness range is wide (24% to 92%), which gives clear hierarchy between background, content and accents. Try it for websites, presentations and branding.

Background: Frost (#E1F2F6) is the lightest color, so it belongs on large surfaces.
Text: Iron (#363F44) on #E1F2F6 gives 9.34:1, passing WCAG AAA.
Primary: Sky Blue (#98D5E2) is the most saturated mid-tone; use it for buttons and links with a border or a darker shade for contrast.
Accent: Slate (#6D7D87) for highlights, badges and hover states.

2 of 6 color pairs pass WCAG AA (4.5:1); the strongest is Iron on Frost at 9.34:1.

Preview on a real UI see how the palette feels in context

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Design faster with Cool Sky Blue & Slate

A palette preview that turns four colors into a page, so you can judge hierarchy, contrast and mood before you commit.

Primary action Secondary

Card title

Roles are assigned by lightness.

Color blindness simulation

#363F44

#6D7D87

#98D5E2

#E1F2F6

Color-blind check: all four colors stay distinguishable under protanopia, deuteranopia and tritanopia.

Palette card

Contrast check WCAG ratios between palette colors

Pair	Sample	Ratio	Level
`#363F44` on `#E1F2F6`	Aa	9.34:1	AAA
`#363F44` on `#98D5E2`	Aa	6.64:1	AA
`#6D7D87` on `#E1F2F6`	Aa	3.7:1	AA large only
`#6D7D87` on `#98D5E2`	Aa	2.63:1	Fail
`#363F44` on `#6D7D87`	Aa	2.53:1	Fail
`#98D5E2` on `#E1F2F6`	Aa	1.41:1	Fail

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