#2837B0#2837B0

#2837B0 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.3% C 0.190 H 269.8°. Best body text is #FFFFFF at 9.28:1 contrast (WCAG AA passes).

Color values

HEX	#2837B0
RGB	rgb(40, 55, 176)
HSL	hsl(233, 63%, 42%)
HSV	hsv(233, 77%, 69%)
CMYK	cmyk(77.3%, 68.8%, 0%, 31%)
CIE-LAB	lab(30.20, 37.50, -65.65)
CIE-LCH	lch(30.20, 75.61, 299.73°)
OKLab	oklab(41.35% -0.0006 -0.19)
OKLCH	oklch(41.35% 0.19 269.8)
XYZ	xyz(10.0750, 6.3170, 41.7542)
Luminance	0.0632 (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

#2837B0 #B0A128

analogous

#287BB0 #2837B0 #5D28B0

triadic

#2837B0 #B02837 #37B028

tetradic

#2837B0 #B0287B #B0A128 #28B05D

square

#2837B0 #B0287B #B0A128 #28B05D

split-complementary

#2837B0 #B05D28 #7BB028

monochromatic

#11184C #1D277E #2837B0 #4151D4 #737FDF

Accessibility & contrast

On white

9.28

#2837B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#2837B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2837B0

9.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2837B0	#FFFFFF	#000000	##FFFFFF
##2837B0	1.00	9.28	2.26	9.28
#FFFFFF	9.28	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB4

Deuteranopia (green-blind)

#0041AE

Tritanopia (blue-blind)

#00586F

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #2837b0;
/* rgb */ color: rgb(40, 55, 176);
/* oklch */ color: oklch(41.3% 0.190 269.8);

Tailwind

colors: {
  custom: {
    50: '#796ec9',
    500: '#2837b0',
    950: '#000000',
  },
}

SCSS

$custom: #2837b0;
$custom-light: #796ec9;
$custom-dark: #000000;

JSON

{
  "hex": "#2837b0",
  "rgb": {
    "r": 40,
    "g": 55,
    "b": 176
  },
  "hsl": {
    "h": 233.382,
    "s": 62.963,
    "l": 42.353
  },
  "oklch": {
    "l": 0.41347,
    "c": 0.19004,
    "h": 269.8
  },
  "luminance": 0.06318
}

Semantic roles & 50–950 ramp

primary

#2837B0

secondary

#C6BD6D

accent

#D442E6

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #2837B0

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

Preview Lab → · Contrast checker → · Palette generator →