#2837A5#2837A5

#2837A5 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.3% C 0.176 H 270.1°. Best body text is #FFFFFF at 9.63:1 contrast (WCAG AA passes).

Color values

HEX	#2837A5
RGB	rgb(40, 55, 165)
HSL	hsl(233, 61%, 40%)
HSV	hsv(233, 76%, 65%)
CMYK	cmyk(75.8%, 66.7%, 0%, 35.3%)
CIE-LAB	lab(29.16, 33.51, -60.76)
CIE-LCH	lch(29.16, 69.39, 298.88°)
OKLab	oklab(40.27% 0.0003 -0.1758)
OKLCH	oklch(40.27% 0.176 270.1)
XYZ	xyz(9.0305, 5.8991, 36.2527)
Luminance	0.0590 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2837A5 #A59628

analogous

#2875A5 #2837A5 #5728A5

triadic

#2837A5 #A52837 #37A528

tetradic

#2837A5 #A52875 #A59628 #28A557

square

#2837A5 #A52875 #A59628 #28A557

split-complementary

#2837A5 #A55728 #75A528

monochromatic

#101642 #1C2774 #2837A5 #3B4DCF #6C79DB

Accessibility & contrast

On white

9.63

#2837A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#2837A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2837A5

9.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2837A5	#FFFFFF	#000000	##FFFFFF
##2837A5	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)

#004BA8

Deuteranopia (green-blind)

#003FA3

Tritanopia (blue-blind)

#005469

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #2837a5;
/* rgb */ color: rgb(40, 55, 165);
/* oklch */ color: oklch(40.3% 0.176 270.1);

Tailwind

colors: {
  custom: {
    50: '#766ec1',
    500: '#2837a5',
    950: '#000000',
  },
}

SCSS

$custom: #2837a5;
$custom-light: #766ec1;
$custom-dark: #000000;

JSON

{
  "hex": "#2837a5",
  "rgb": {
    "r": 40,
    "g": 55,
    "b": 165
  },
  "hsl": {
    "h": 232.8,
    "s": 60.976,
    "l": 40.196
  },
  "oklch": {
    "l": 0.40272,
    "c": 0.17576,
    "h": 270.1
  },
  "luminance": 0.059
}

Semantic roles & 50–950 ramp

primary

#2837A5

secondary

#C2B767

accent

#D144E4

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #2837A5

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

Preview Lab → · Contrast checker → · Palette generator →