#2840A4#2840A4

#2840A4 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.9% C 0.164 H 268.1°. Best body text is #FFFFFF at 8.90:1 contrast (WCAG AA passes).

Color values

HEX	#2840A4
RGB	rgb(40, 64, 164)
HSL	hsl(228, 61%, 40%)
HSV	hsv(228, 76%, 64%)
CMYK	cmyk(75.6%, 61%, 0%, 35.7%)
CIE-LAB	lab(31.34, 27.23, -56.59)
CIE-LCH	lch(31.34, 62.80, 295.69°)
OKLab	oklab(41.85% -0.0055 -0.1634)
OKLCH	oklch(41.85% 0.164 268.1)
XYZ	xyz(9.4070, 6.7972, 35.9310)
Luminance	0.0680 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2840A4 #A48C28

analogous

#287EA4 #2840A4 #4E28A4

triadic

#2840A4 #A42840 #40A428

tetradic

#2840A4 #A4287E #A48C28 #28A44E

square

#2840A4 #A4287E #A48C28 #28A44E

split-complementary

#2840A4 #A44E28 #7EA428

monochromatic

#101A42 #1C2D73 #2840A4 #3A57CF #6B81DB

Accessibility & contrast

On white

8.90

#2840A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#2840A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2840A4

8.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2840A4	#FFFFFF	#000000	##FFFFFF
##2840A4	1.00	8.90	2.36	8.90
#FFFFFF	8.90	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A7

Deuteranopia (green-blind)

#0044A2

Tritanopia (blue-blind)

#00596B

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #2840a4;
/* rgb */ color: rgb(40, 64, 164);
/* oklch */ color: oklch(41.9% 0.164 268.1);

Tailwind

colors: {
  custom: {
    50: '#7574c0',
    500: '#2840a4',
    950: '#000000',
  },
}

SCSS

$custom: #2840a4;
$custom-light: #7574c0;
$custom-dark: #000000;

JSON

{
  "hex": "#2840a4",
  "rgb": {
    "r": 40,
    "g": 64,
    "b": 164
  },
  "hsl": {
    "h": 228.387,
    "s": 60.784,
    "l": 40
  },
  "oklch": {
    "l": 0.41854,
    "c": 0.16353,
    "h": 268.1
  },
  "luminance": 0.06798
}

Semantic roles & 50–950 ramp

primary

#2840A4

secondary

#C1B066

accent

#C544E4

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #2840A4

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

Preview Lab → · Contrast checker → · Palette generator →