#2831A3#2831A3

#2831A3 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 39.0% C 0.180 H 271.3°. Best body text is #FFFFFF at 10.20:1 contrast (WCAG AA passes).

Color values

HEX	#2831A3
RGB	rgb(40, 49, 163)
HSL	hsl(236, 61%, 40%)
HSV	hsv(236, 75%, 64%)
CMYK	cmyk(75.5%, 69.9%, 0%, 36.1%)
CIE-LAB	lab(27.55, 36.60, -62.20)
CIE-LCH	lch(27.55, 72.17, 300.48°)
OKLab	oklab(39.05% 0.004 -0.18)
OKLCH	oklch(39.05% 0.18 271.3)
XYZ	xyz(8.5820, 5.2912, 35.2122)
Luminance	0.0529 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2831A3 #A39A28

analogous

#286EA3 #2831A3 #5D28A3

triadic

#2831A3 #A32831 #31A328

tetradic

#2831A3 #A3286E #A39A28 #28A35D

square

#2831A3 #A3286E #A39A28 #28A35D

split-complementary

#2831A3 #A35D28 #6EA328

monochromatic

#101341 #1C2272 #2831A3 #3A45CF #6B73DB

Accessibility & contrast

On white

10.20

#2831A3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#2831A3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2831A3

10.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2831A3	#FFFFFF	#000000	##FFFFFF
##2831A3	1.00	10.20	2.06	10.20
#FFFFFF	10.20	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047A6

Deuteranopia (green-blind)

#003BA1

Tritanopia (blue-blind)

#005066

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #2831a3;
/* rgb */ color: rgb(40, 49, 163);
/* oklch */ color: oklch(39.0% 0.180 271.3);

Tailwind

colors: {
  custom: {
    50: '#7669bf',
    500: '#2831a3',
    950: '#000000',
  },
}

SCSS

$custom: #2831a3;
$custom-light: #7669bf;
$custom-dark: #000000;

JSON

{
  "hex": "#2831a3",
  "rgb": {
    "r": 40,
    "g": 49,
    "b": 163
  },
  "hsl": {
    "h": 235.61,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.39046,
    "c": 0.18001,
    "h": 271.3
  },
  "luminance": 0.05292
}

Semantic roles & 50–950 ramp

primary

#2831A3

secondary

#C1BA66

accent

#D844E4

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#0A0612

muted

#7C7A81

Preview Lab

Preview with #2831A3

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

Preview Lab → · Contrast checker → · Palette generator →