#2831A4#2831A4

#2831A4 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 39.1% C 0.181 H 271.2°. Best body text is #FFFFFF at 10.17:1 contrast (WCAG AA passes).

Color values

HEX	#2831A4
RGB	rgb(40, 49, 164)
HSL	hsl(236, 61%, 40%)
HSV	hsv(236, 76%, 64%)
CMYK	cmyk(75.6%, 70.1%, 0%, 35.7%)
CIE-LAB	lab(27.65, 36.96, -62.64)
CIE-LCH	lch(27.65, 72.73, 300.54°)
OKLab	oklab(39.15% 0.0039 -0.1813)
OKLCH	oklch(39.15% 0.181 271.2)
XYZ	xyz(8.6720, 5.3272, 35.6860)
Luminance	0.0533 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2831A4 #A49B28

analogous

#286FA4 #2831A4 #5D28A4

triadic

#2831A4 #A42831 #31A428

tetradic

#2831A4 #A4286F #A49B28 #28A45D

square

#2831A4 #A4286F #A49B28 #28A45D

split-complementary

#2831A4 #A45D28 #6FA428

monochromatic

#101442 #1C2273 #2831A4 #3A45CF #6B74DB

Accessibility & contrast

On white

10.17

#2831A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#2831A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2831A4

10.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2831A4	#FFFFFF	#000000	##FFFFFF
##2831A4	1.00	10.17	2.07	10.17
#FFFFFF	10.17	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047A7

Deuteranopia (green-blind)

#003BA2

Tritanopia (blue-blind)

#005166

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #2831a4;
/* rgb */ color: rgb(40, 49, 164);
/* oklch */ color: oklch(39.1% 0.181 271.2);

Tailwind

colors: {
  custom: {
    50: '#766ac0',
    500: '#2831a4',
    950: '#000000',
  },
}

SCSS

$custom: #2831a4;
$custom-light: #766ac0;
$custom-dark: #000000;

JSON

{
  "hex": "#2831a4",
  "rgb": {
    "r": 40,
    "g": 49,
    "b": 164
  },
  "hsl": {
    "h": 235.645,
    "s": 60.784,
    "l": 40
  },
  "oklch": {
    "l": 0.39147,
    "c": 0.1813,
    "h": 271.2
  },
  "luminance": 0.05328
}

Semantic roles & 50–950 ramp

primary

#2831A4

secondary

#C1BB66

accent

#D844E4

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0612

muted

#7C7A81

Preview Lab

Preview with #2831A4

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →