#2831B3#2831B3

#2831B3 is a dark, highly saturated blue. Relative luminance 0.059; OKLCH L 40.7% C 0.200 H 270.6°. Best body text is #FFFFFF at 9.63:1 contrast (WCAG AA passes).

Color values

HEX	#2831B3
RGB	rgb(40, 49, 179)
HSL	hsl(236, 63%, 43%)
HSV	hsv(236, 78%, 70%)
CMYK	cmyk(77.7%, 72.6%, 0%, 29.8%)
CIE-LAB	lab(29.16, 42.22, -69.15)
CIE-LCH	lch(29.16, 81.02, 301.41°)
OKLab	oklab(40.69% 0.0019 -0.2002)
OKLCH	oklch(40.69% 0.2 270.6)
XYZ	xyz(10.1073, 5.9013, 43.2455)
Luminance	0.0590 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.26

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2831B3 #B3AA28

analogous

#2876B3 #2831B3 #6428B3

triadic

#2831B3 #B32831 #31B328

tetradic

#2831B3 #B32876 #B3AA28 #28B364

square

#2831B3 #B32876 #B3AA28 #28B364

split-complementary

#2831B3 #B36428 #76B328

monochromatic

#12164F #1D2381 #2831B3 #434DD5 #757CE0

Accessibility & contrast

On white

9.63

#2831B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#2831B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2831B3

9.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2831B3	#FFFFFF	#000000	##FFFFFF
##2831B3	1.00	9.63	2.18	9.63
#FFFFFF	9.63	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BB7

Deuteranopia (green-blind)

#003EB1

Tritanopia (blue-blind)

#00566F

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #2831b3;
/* rgb */ color: rgb(40, 49, 179);
/* oklch */ color: oklch(40.7% 0.200 270.6);

Tailwind

colors: {
  custom: {
    50: '#7a6acb',
    500: '#2831b3',
    950: '#000000',
  },
}

SCSS

$custom: #2831b3;
$custom-light: #7a6acb;
$custom-dark: #000000;

JSON

{
  "hex": "#2831b3",
  "rgb": {
    "r": 40,
    "g": 49,
    "b": 179
  },
  "hsl": {
    "h": 236.115,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.4069,
    "c": 0.20024,
    "h": 270.6
  },
  "luminance": 0.05902
}

Semantic roles & 50–950 ramp

primary

#2831B3

secondary

#C8C26F

accent

#DC41E6

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #2831B3

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

Preview Lab → · Contrast checker → · Palette generator →