Tailwind CSS v3 color

Tailwind indigo-300 #A5B4FC

Tailwind CSS v3's indigo-300 is #A5B4FC. It is a light soft blue in the blue family. In OKLCH it sits at lightness 0.785, chroma 0.104 and hue 274.7°. The nearest CSS named color is lightsteelblue (#B0C4DE), ΔE2000 8.3 away.

Relative luminance
0.4767
OKLCH L · C · h
0.785 · 0.104 · 274.7
Best text
Black 10.53:1
Hue family
Blue
Inspect this color Check contrast

#A5B4FC color codes

HEX
#A5B4FC
RGB
rgb(165, 180, 252)
HSL
hsl(230, 94%, 82%)
OKLCH
oklch(0.785 0.104 274.7)
OKLab
oklab(0.785 0.009 -0.104)
CIELAB (D65)
L* 74.62, a* 11.43, b* -37.31
XYZ (D65)
X 49.40, Y 47.67, Z 98.67
CMYK (naive)
cmyk(35%, 29%, 0%, 1%)

CIELAB and XYZ use the D65 white point; CSS lab() uses D50, so paste the OKLCH or HEX value into stylesheets. CMYK here is a plain formula with no press profile.

Legibility

Contrast: is #A5B4FC accessible?

Black text on it reaches 10.53:1, passing AAA. White text fails at 1.99:1.

WCAG 2 gives the same ratio whichever color is the text; APCA does not, so its Lc changes sign and size with polarity.

Open the Contrast System

  • Black text on it

    10.53:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc +65

  • White text on it

    1.99:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc −42

  • As text on black

    10.53:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc −63

  • As text on white

    1.99:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc +38

Nearest versions that pass 4.5:1

  • For text on white

    #6572B5 4.53:1

    Darkening its OKLCH lightness from 0.79 to 0.57 reaches 4.53:1 on white, keeping the hue.

    Compare both in the Contrast System

  • For text on black

    #A5B4FC 10.53:1

    It already reaches 10.53:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #A5B4FC live

Move lightness, chroma and hue in OKLCH, or drag on the map. The map is every lightness and chroma at the current hue: sRGB inside the solid area, Display P3 out to the dashed line.

The studio needs JavaScript.

Scale

Shades and tints of #A5B4FC

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #A5B4FC sits at step 300.

  1. 50#F2F5FF
    White
    1.08
    Black
    19.28
  2. 100#E5EAFF
    White
    1.19
    Black
    17.54
  3. 200#CBD5FF
    White
    1.44
    Black
    14.50
  4. 300This color#A5B4FC
    White
    1.99
    Black
    10.53
  5. 400#8E9CE1
    White
    2.62
    Black
    7.99
  6. 500#7481C5
    White
    3.69
    Black
    5.68
  7. 600#5D69AA
    White
    5.16
    Black
    4.06
  8. 700#485290
    White
    7.27
    Black
    2.88
  9. 800#323971
    White
    10.71
    Black
    1.95
  10. 900#1D2253
    White
    14.93
    Black
    1.40
  11. 950#0D0F39
    White
    18.34
    Black
    1.14

Under each step, white and black text on it; a bold figure passes 4.5:1.

Tailwind CSS v3 indigo scale

The real Tailwind palette, for comparison with the computed ramp above.

  1. 50#EEF2FF
    White
    1.11
    Black
    18.78
  2. 100#E0E7FF
    White
    1.23
    Black
    17.04
  3. 200#C7D2FE
    White
    1.49
    Black
    14.07
  4. 300This color#A5B4FC
    White
    1.99
    Black
    10.53
  5. 400#818CF8
    White
    2.98
    Black
    7.04
  6. 500#6366F1
    White
    4.46
    Black
    4.70
  7. 600#4F46E5
    White
    6.28
    Black
    3.33
  8. 700#4338CA
    White
    7.90
    Black
    2.65
  9. 800#3730A3
    White
    9.93
    Black
    2.11
  10. 900#312E81
    White
    11.42
    Black
    1.83
  11. 950#1E1B4B
    White
    15.98
    Black
    1.31

Gamut

How vivid #A5B4FC can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.109; #A5B4FC uses 96% of it. Display P3, which many recent phones and laptops show, reaches 0.119 there: 9% more.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.104
sRGB edge
0.109
Display P3 edge
0.119
Rec. 2020 edge
0.121
Dominant wavelength
470 nm
Excitation purity
32%
Chromaticity
x 0.2524, y 0.2435
  • This color#A5B4FC
  • Most vivid in sRGB#A4B4FF
  • Most vivid in Display P3oklch(0.785 0.119 274.7)

On a screen without Display P3 the last tile shows the sRGB edge instead.

Use the wider color where screens show it
.accent {
  color: #a5b4fc;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.6489 0.6992 1); }
}

Mixing

Mixing #A5B4FC

Each row is the same mix worked out in a different space, with the halfway color at its end. sRGB, which older CSS gradients use, can sag gray or dark in the middle; OKLab keeps the lightness steps even; OKLCH holds chroma and hue as it goes.

White #FFFFFF

  • sRGB50%#D2DAFE
  • OKLab50%#D1DAFF
  • OKLCH50%#D1DAFF

Black #000000

  • sRGB50%#535A7E
  • OKLab50%#3D4462
  • OKLCH50%#3D4462

Its complement #CEB868

  • sRGB50%#BAB6B2
  • OKLab50%#B9B9B9
  • OKLCH50%#F29DB0
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #a5b4fc, white);
color: color-mix(in oklch, #a5b4fc 50%, white);

In use

#A5B4FC in an interface

A button, a link, a heading, a focused field, an icon and a chart line in this color, on a light page and a dark one. Each check is a WCAG 2 contrast minimum: 1.4.3 for text, 1.4.11 for the rest.

Light page

  • Button labelText, 4.5:110.53:1 Passes
  • Link and body-size textText, 4.5:11.99:1 Fails
  • Large headingLarge text, 3:11.99:1 Fails
  • Icons, borders and focus ringsNon-text, 3:11.99:1 Fails

For text on this page, the nearest shade that passes is #6572B5 4.53:1

Dark page

  • Button labelText, 4.5:110.53:1 Passes
  • Link and body-size textText, 4.5:19.39:1 Passes
  • Large headingLarge text, 3:19.39:1 Passes
  • Icons, borders and focus ringsNon-text, 3:19.39:1 Passes

Color vision

How #A5B4FC looks with color blindness

Achromatopsia changes it most, ΔE2000 21.1; deuteranopia changes it least, 3.4.

Simulated with Machado et al. (2009) at full severity, in linear light.

Simulate a whole page What each type sees

  • Protanopia

    No working red (long-wavelength) cones

    #9DBBFF ΔE2000 3.7

    Close match

    Reads as light soft blue

  • Deuteranopia

    No working green (medium-wavelength) cones

    #97B4FA ΔE2000 3.4

    Close match

    Reads as light soft blue

  • Tritanopia

    No working blue (short-wavelength) cones

    #8CC2CD ΔE2000 19.4

    Distinct

    Reads as light muted cyan

  • Achromatopsia

    No cone color vision; lightness only

    #B8B8B8 ΔE2000 21.1

    Distinct

    Reads as light gray

Pairing check

Checked against its complement, #CEB868. Their lightness contrast is only 1.01:1, so where hue collapses, add a label, icon or pattern.

VisionThe pairΔE2000Verdict
Normal vision#A5B4FC · #CEB86848.0Stays distinct
Protanopia#9DBBFF · #C7B56147.4Stays distinct
Deuteranopia#97B4FA · #CDBC6B47.6Stays distinct
Tritanopia#8CC2CD · #DCADA540.2Stays distinct
Achromatopsia#B8B8B8 · #B9B9B90.3Easily confused

Harmony

Color harmonies for #A5B4FC

Its complement is #CEB868, a light soft amber, on the warm side of the wheel.

Hue rotations in OKLCH, mapped into sRGB by trimming chroma so hue and lightness stay put.

Open the Harmony Studio
  • Base#A5B4FC
  • Complement#CEB868

Complementary

Open in Harmony Studio
  • −30°#7EC0F7
  • Base#A5B4FC
  • +30°#C8A8EF

Analogous

Open in Harmony Studio
  • Base#A5B4FC
  • +120°#F4A18C
  • +240°#81CD9B

Triadic

Open in Harmony Studio
  • Base#A5B4FC
  • +150°#E8AB70
  • +210°#AAC57A

Split-complementary

Open in Harmony Studio

Code

Design tokens

Ready-to-paste tokens in six formats. Rename them to fit your system.

CSS custom property

:root {
  --color-indigo-300: #a5b4fc;
}

Tailwind config

// tailwind.config.js — already built in as indigo-300;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        indigo: { 300: '#a5b4fc' },
      },
    },
  },
};

Tailwind v4 theme

/* app.css — Tailwind CSS v4 */
@import "tailwindcss";

@theme {
  /* v4 has its own indigo-300; this pins the v3 value. */
  --color-indigo-300: oklch(0.785 0.104 274.7);
}

Design token (W3C DTCG)

{
  "color": {
    "indigo-300": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.6471, 0.7059, 0.9882],
        "hex": "#a5b4fc"
      },
      "$description": "Tailwind CSS v3 indigo-300"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let indigo300 = Color(.sRGB, red: 0.647, green: 0.706, blue: 0.988, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Indigo300 = Color(0xFFA5B4FC)
}

Matches

The nearest match in each system

The closest CSS name, Tailwind shade, RAL Classic paint and Crayola crayon by ΔE2000; under 2 is hard to tell apart side by side. RAL and Crayola values approximate physical colors.

Neighbors

The eight nearest colors on this site by ΔE2000, closest first. Under 2 is hard to tell apart side by side.

Tools

Open #A5B4FC in the tools

Each opens over this page. More colors live in the Color Library, and every color page is listed on the hub.