#2837B1#2837B1

#2837B1 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.4% C 0.191 H 269.8°. Best body text is #FFFFFF at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#2837B1
RGB	rgb(40, 55, 177)
HSL	hsl(233, 63%, 43%)
HSV	hsv(233, 77%, 69%)
CMYK	cmyk(77.4%, 68.9%, 0%, 30.6%)
CIE-LAB	lab(30.30, 37.86, -66.09)
CIE-LCH	lch(30.30, 76.16, 299.81°)
OKLab	oklab(41.45% -0.0007 -0.1913)
OKLCH	oklch(41.45% 0.191 269.8)
XYZ	xyz(10.1744, 6.3567, 42.2772)
Luminance	0.0636 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2837B1 #B1A228

analogous

#287BB1 #2837B1 #5E28B1

triadic

#2837B1 #B12837 #37B128

tetradic

#2837B1 #B1287B #B1A228 #28B15E

square

#2837B1 #B1287B #B1A228 #28B15E

split-complementary

#2837B1 #B15E28 #7BB128

monochromatic

#11184D #1D277F #2837B1 #4252D4 #7480E0

Accessibility & contrast

On white

9.24

#2837B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#2837B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2837B1

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2837B1	#FFFFFF	#000000	##FFFFFF
##2837B1	1.00	9.24	2.27	9.24
#FFFFFF	9.24	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB5

Deuteranopia (green-blind)

#0041AF

Tritanopia (blue-blind)

#00596F

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #2837b1;
/* rgb */ color: rgb(40, 55, 177);
/* oklch */ color: oklch(41.4% 0.191 269.8);

Tailwind

colors: {
  custom: {
    50: '#796ec9',
    500: '#2837b1',
    950: '#000000',
  },
}

SCSS

$custom: #2837b1;
$custom-light: #796ec9;
$custom-dark: #000000;

JSON

{
  "hex": "#2837b1",
  "rgb": {
    "r": 40,
    "g": 55,
    "b": 177
  },
  "hsl": {
    "h": 233.431,
    "s": 63.134,
    "l": 42.549
  },
  "oklch": {
    "l": 0.41446,
    "c": 0.19132,
    "h": 269.8
  },
  "luminance": 0.06358
}

Semantic roles & 50–950 ramp

primary

#2837B1

secondary

#C7BD6E

accent

#D442E6

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #2837B1

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

Preview Lab → · Contrast checker → · Palette generator →