#f1f5f9

#f1f5f9 is rgb(241, 245, 249), or hsl(210, 40%, 96%). It exactly matches the sRGB hex approximation of slate-100 in the reference Tailwind v4 palette.

Conversions

WCAG contrast

Background	Ratio	AA text	AA large	AAA text
white	1.10:1	fail	fail	fail
black	19.17:1	pass	pass	pass
slate-900	16.30:1	pass	pass	pass
gray-100	1.00:1	fail	fail	fail

Ratios use WCAG relative luminance for opaque sRGB colors. Normal text requires 4.5:1, or 7:1 at AAA. Large text requires 3:1: at least 24 CSS pixels, or about 18.67 CSS pixels when bold. Pass/fail uses the unrounded ratio. Contrast alone is not a full accessibility assessment.

Colors paired with #f1f5f9 in real UI palettes

These colors appear alongside #f1f5f9 in StyleKit's curated palettes. Co-occurrence is not a promise of text readability; each pair includes its measured contrast.

#10b981
Used together in Holy Grail Layout, Soft UI.
2.32:1
Not for normal text
#f59e0b
Used together in Holy Grail Layout, Soft UI.
1.96:1
Not for normal text
#1e293b
Used together in Holy Grail Layout.
13.35:1
AA normal text
#3b82f6
Used together in Holy Grail Layout.
3.36:1
Not for normal text
#6366f1
Used together in Soft UI.
4.08:1
Not for normal text
#ec4899
Used together in Soft UI.
3.22:1
Not for normal text

A readable starting point

black text on #f1f5f9: 19.17:1 contrast.

Design styles using this color

Tints and shades

#fcfdfe

#f9fbfd

#f7f9fb

#f4f7fa

#acc4dc

#6893be

#3b6289

#1d3145

Lightness ladder in HSL space, from the lightest tint to the darkest shade of #f1f5f9.

Similar colors in the library

#f3f4f6 #f5f5f7 #f4f4f4 #f5f5f5 #f7f7f8 #f4f8f6 #f0f0f5 #f8f6f3

Nearest swatches by perceptual OKLab distance across all curated style palettes.

AI prompt snippet

Use #f1f5f9 as the secondary color, following the Holy Grail Layout style: rgb(241, 245, 249), nearest Tailwind token slate-100. Keep text contrast at least 4.5:1 (this color scores 1.1:1 on white, 19.17:1 on black).

Paste this into ChatGPT, Claude, Cursor, or v0 to use #f1f5f9 with correct contrast constraints. Browse all palette colors.

Questions about #f1f5f9

What color is #f1f5f9?

#f1f5f9 is rgb(241, 245, 249), or hsl(210, 40%, 96%). It exactly matches the sRGB hex approximation of slate-100 in the reference Tailwind v4 palette.

What text color should I use on #f1f5f9?

Black (#000000) has the higher black-or-white contrast against #f1f5f9: 19.17:1. This calculation assumes opaque, flat sRGB colors. Normal text requires 4.5:1 and large text 3:1 under WCAG 2.2 SC 1.4.3; it is not a complete accessibility assessment.

How can I use exactly #f1f5f9 in Tailwind CSS?

Use bg-[#f1f5f9], text-[#f1f5f9], or a CSS custom property instead of substituting a nearby named token. The reference palette is Tailwind CSS 4.1.18, converted from OKLCH to sRGB hex; newer Tailwind versions and custom themes can differ.

Sources and calculation limits

Reference palette: Tailwind CSS 4.1.18, converted from OKLCH to sRGB hex. Named tokens are versioned approximations; use the exact hex utilities when matching an existing design. Palette pairings come from the linked StyleKit definitions, not external popularity or preference data.