#2837A3#2837A3

#2837A3 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 40.1% C 0.173 H 270.2°. Best body text is #FFFFFF at 9.70:1 contrast (WCAG AA passes).

Color values

HEX	#2837A3
RGB	rgb(40, 55, 163)
HSL	hsl(233, 61%, 40%)
HSV	hsv(233, 75%, 64%)
CMYK	cmyk(75.5%, 66.3%, 0%, 36.1%)
CIE-LAB	lab(28.97, 32.78, -59.86)
CIE-LCH	lch(28.97, 68.25, 298.71°)
OKLab	oklab(40.08% 0.0005 -0.1731)
OKLCH	oklch(40.08% 0.173 270.2)
XYZ	xyz(8.8499, 5.8269, 35.3015)
Luminance	0.0583 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2837A3 #A39428

analogous

#2875A3 #2837A3 #5728A3

triadic

#2837A3 #A32837 #37A328

tetradic

#2837A3 #A32875 #A39428 #28A357

square

#2837A3 #A32875 #A39428 #28A357

split-complementary

#2837A3 #A35728 #75A328

monochromatic

#101641 #1C2672 #2837A3 #3A4CCF #6B78DB

Accessibility & contrast

On white

9.70

#2837A3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#2837A3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2837A3

9.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2837A3	#FFFFFF	#000000	##FFFFFF
##2837A3	1.00	9.70	2.17	9.70
#FFFFFF	9.70	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA6

Deuteranopia (green-blind)

#003FA1

Tritanopia (blue-blind)

#005468

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #2837a3;
/* rgb */ color: rgb(40, 55, 163);
/* oklch */ color: oklch(40.1% 0.173 270.2);

Tailwind

colors: {
  custom: {
    50: '#756ebf',
    500: '#2837a3',
    950: '#000000',
  },
}

SCSS

$custom: #2837a3;
$custom-light: #756ebf;
$custom-dark: #000000;

JSON

{
  "hex": "#2837a3",
  "rgb": {
    "r": 40,
    "g": 55,
    "b": 163
  },
  "hsl": {
    "h": 232.683,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.4008,
    "c": 0.17312,
    "h": 270.2
  },
  "luminance": 0.05828
}

Semantic roles & 50–950 ramp

primary

#2837A3

secondary

#C1B666

accent

#D044E4

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #2837A3

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

Preview Lab → · Contrast checker → · Palette generator →