#2837A0#2837A0

#2837A0 is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.8% C 0.169 H 270.2°. Best body text is #FFFFFF at 9.79:1 contrast (WCAG AA passes).

Color values

HEX	#2837A0
RGB	rgb(40, 55, 160)
HSL	hsl(233, 60%, 39%)
HSV	hsv(233, 75%, 63%)
CMYK	cmyk(75%, 65.6%, 0%, 37.3%)
CIE-LAB	lab(28.70, 31.67, -58.49)
CIE-LCH	lch(28.70, 66.52, 298.44°)
OKLab	oklab(39.8% 0.0007 -0.1691)
OKLCH	oklch(39.8% 0.169 270.2)
XYZ	xyz(8.5843, 5.7207, 33.9027)
Luminance	0.0572 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2837A0 #A09128

analogous

#2873A0 #2837A0 #5528A0

triadic

#2837A0 #A02837 #37A028

tetradic

#2837A0 #A02873 #A09128 #28A055

square

#2837A0 #A02873 #A09128 #28A055

split-complementary

#2837A0 #A05528 #73A028

monochromatic

#10153E #1C266F #2837A0 #384BCD #6977D9

Accessibility & contrast

On white

9.79

#2837A0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#2837A0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2837A0

9.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2837A0	#FFFFFF	#000000	##FFFFFF
##2837A0	1.00	9.79	2.14	9.79
#FFFFFF	9.79	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049A3

Deuteranopia (green-blind)

#003E9E

Tritanopia (blue-blind)

#005366

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #2837a0;
/* rgb */ color: rgb(40, 55, 160);
/* oklch */ color: oklch(39.8% 0.169 270.2);

Tailwind

colors: {
  custom: {
    50: '#756ebd',
    500: '#2837a0',
    950: '#000000',
  },
}

SCSS

$custom: #2837a0;
$custom-light: #756ebd;
$custom-dark: #000000;

JSON

{
  "hex": "#2837a0",
  "rgb": {
    "r": 40,
    "g": 55,
    "b": 160
  },
  "hsl": {
    "h": 232.5,
    "s": 60,
    "l": 39.216
  },
  "oklch": {
    "l": 0.39795,
    "c": 0.16912,
    "h": 270.2
  },
  "luminance": 0.05722
}

Semantic roles & 50–950 ramp

primary

#2837A0

secondary

#C0B464

accent

#CF45E3

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #2837A0

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

Preview Lab → · Contrast checker → · Palette generator →