Material Indigo A100

RGB: rgb(140 158 255)
HSL: hsl(231 100% 77%)
HWB: hwb(231 55% 0%)
Color family: Indigo
Recommended foreground: #000000

Calculated profile

What the numbers say

At 231° hue, Material Indigo A100 is a high-saturation, light, cool-hue sRGB color. Its relative luminance is 37.25%. For text on this background, #000000 produces the stronger contrast at 8.45:1.

HSL lightness: 77%
HSL saturation: 100%
Relative luminance: 37.25%
Hue group: cool-hue

Copy-ready color formats

Equivalent sRGB notations calculated from the same six-digit HEX value.

Text contrast against this color

Ratios use WCAG relative luminance. Passing a ratio does not by itself certify an interface.

White text2.49:1

AA normal text: Fail
AA large text: Fail
AAA normal text: Fail
AAA large text: Fail

Black text8.45:1

AA normal text: Pass
AA large text: Pass
AAA normal text: Pass
AAA large text: Pass

Calculated tints and shades

Tints mix the color with white; shades mix it with black in sRGB.

Tints

Shades

Hue-wheel relationships

These colors keep the original HSL saturation and lightness while rotating hue. They are mathematical starting points, not automatic design recommendations.

Opacity variants

Eight-digit HEX and modern rgb() alpha syntax for the same opacity.

20%

40%

60%

80%

CSS starter

A small custom-property block using the calculated foreground with the stronger black-or-white contrast.

--color-material-indigo-a100: #8C9EFF;
--color-material-indigo-a100-rgb: 140 158 255;
--color-material-indigo-a100-hsl: 231 100% 77%;
color: #000000;
background-color: var(--color-material-indigo-a100);

Community review

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Correction for Material Indigo A100#8C9EFF

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08 / Verification

Where the values come from

The color name and HEX value are checked against the cited standard. RGB, HSL, HWB, luminance, and contrast are then calculated from that HEX value using published formulas.

Source for the name and HEX: Material Design 2014 color palette