#2831B1#2831B1

#2831B1 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 40.5% C 0.198 H 270.6°. Best body text is #FFFFFF at 9.70:1 contrast (WCAG AA passes).

Color values

HEX	#2831B1
RGB	rgb(40, 49, 177)
HSL	hsl(236, 63%, 43%)
HSV	hsv(236, 77%, 69%)
CMYK	cmyk(77.4%, 72.3%, 0%, 30.6%)
CIE-LAB	lab(28.96, 41.53, -68.29)
CIE-LCH	lch(28.96, 79.93, 301.30°)
OKLab	oklab(40.48% 0.0022 -0.1977)
OKLCH	oklch(40.48% 0.198 270.6)
XYZ	xyz(9.9065, 5.8210, 42.1879)
Luminance	0.0582 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.42

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2831B1 #B1A828

analogous

#2876B1 #2831B1 #6328B1

triadic

#2831B1 #B12831 #31B128

tetradic

#2831B1 #B12876 #B1A828 #28B163

square

#2831B1 #B12876 #B1A828 #28B163

split-complementary

#2831B1 #B16328 #76B128

monochromatic

#11154D #1D237F #2831B1 #424CD4 #747BE0

Accessibility & contrast

On white

9.70

#2831B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#2831B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2831B1

9.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2831B1	#FFFFFF	#000000	##FFFFFF
##2831B1	1.00	9.70	2.16	9.70
#FFFFFF	9.70	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BB5

Deuteranopia (green-blind)

#003EAF

Tritanopia (blue-blind)

#00556E

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #2831b1;
/* rgb */ color: rgb(40, 49, 177);
/* oklch */ color: oklch(40.5% 0.198 270.6);

Tailwind

colors: {
  custom: {
    50: '#796aca',
    500: '#2831b1',
    950: '#000000',
  },
}

SCSS

$custom: #2831b1;
$custom-light: #796aca;
$custom-dark: #000000;

JSON

{
  "hex": "#2831b1",
  "rgb": {
    "r": 40,
    "g": 49,
    "b": 177
  },
  "hsl": {
    "h": 236.058,
    "s": 63.134,
    "l": 42.549
  },
  "oklch": {
    "l": 0.40482,
    "c": 0.19776,
    "h": 270.6
  },
  "luminance": 0.05822
}

Semantic roles & 50–950 ramp

primary

#2831B1

secondary

#C7C16E

accent

#DB42E6

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #2831B1

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

Preview Lab → · Contrast checker → · Palette generator →