#2837A4#2837A4

#2837A4 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.2% C 0.174 H 270.1°. Best body text is #FFFFFF at 9.66:1 contrast (WCAG AA passes).

Color values

HEX	#2837A4
RGB	rgb(40, 55, 164)
HSL	hsl(233, 61%, 40%)
HSV	hsv(233, 76%, 64%)
CMYK	cmyk(75.6%, 66.5%, 0%, 35.7%)
CIE-LAB	lab(29.06, 33.15, -60.31)
CIE-LCH	lch(29.06, 68.82, 298.79°)
OKLab	oklab(40.18% 0.0004 -0.1744)
OKLCH	oklch(40.18% 0.174 270.1)
XYZ	xyz(8.9398, 5.8629, 35.7753)
Luminance	0.0586 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2837A4 #A49528

analogous

#2875A4 #2837A4 #5728A4

triadic

#2837A4 #A42837 #37A428

tetradic

#2837A4 #A42875 #A49528 #28A457

square

#2837A4 #A42875 #A49528 #28A457

split-complementary

#2837A4 #A45728 #75A428

monochromatic

#101642 #1C2773 #2837A4 #3A4CCF #6B79DB

Accessibility & contrast

On white

9.66

#2837A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#2837A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2837A4

9.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2837A4	#FFFFFF	#000000	##FFFFFF
##2837A4	1.00	9.66	2.17	9.66
#FFFFFF	9.66	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA7

Deuteranopia (green-blind)

#003FA2

Tritanopia (blue-blind)

#005468

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #2837a4;
/* rgb */ color: rgb(40, 55, 164);
/* oklch */ color: oklch(40.2% 0.174 270.1);

Tailwind

colors: {
  custom: {
    50: '#766ec0',
    500: '#2837a4',
    950: '#000000',
  },
}

SCSS

$custom: #2837a4;
$custom-light: #766ec0;
$custom-dark: #000000;

JSON

{
  "hex": "#2837a4",
  "rgb": {
    "r": 40,
    "g": 55,
    "b": 164
  },
  "hsl": {
    "h": 232.742,
    "s": 60.784,
    "l": 40
  },
  "oklch": {
    "l": 0.40176,
    "c": 0.17444,
    "h": 270.1
  },
  "luminance": 0.05864
}

Semantic roles & 50–950 ramp

primary

#2837A4

secondary

#C1B666

accent

#D144E4

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #2837A4

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

Preview Lab → · Contrast checker → · Palette generator →