#2840AB#2840AB

#2840AB is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.5% C 0.173 H 268.2°. Best body text is #FFFFFF at 8.71:1 contrast (WCAG AA passes).

Color values

HEX	#2840AB
RGB	rgb(40, 64, 171)
HSL	hsl(229, 62%, 41%)
HSV	hsv(229, 77%, 67%)
CMYK	cmyk(76.6%, 62.6%, 0%, 32.9%)
CIE-LAB	lab(31.94, 29.86, -59.81)
CIE-LCH	lch(31.94, 66.85, 296.53°)
OKLab	oklab(42.48% -0.0056 -0.1729)
OKLCH	oklch(42.48% 0.173 268.2)
XYZ	xyz(10.0566, 7.0571, 39.3523)
Luminance	0.0706 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2840AB #AB9328

analogous

#2882AB #2840AB #5228AB

triadic

#2840AB #AB2840 #40AB28

tetradic

#2840AB #AB2882 #AB9328 #28AB52

square

#2840AB #AB2882 #AB9328 #28AB52

split-complementary

#2840AB #AB5228 #82AB28

monochromatic

#111B48 #1C2D79 #2840AB #3E59D2 #7084DE

Accessibility & contrast

On white

8.71

#2840AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#2840AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2840AB

8.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2840AB	#FFFFFF	#000000	##FFFFFF
##2840AB	1.00	8.71	2.41	8.71
#FFFFFF	8.71	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AE

Deuteranopia (green-blind)

#0045A9

Tritanopia (blue-blind)

#005C6F

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #2840ab;
/* rgb */ color: rgb(40, 64, 171);
/* oklch */ color: oklch(42.5% 0.173 268.2);

Tailwind

colors: {
  custom: {
    50: '#7774c5',
    500: '#2840ab',
    950: '#000000',
  },
}

SCSS

$custom: #2840ab;
$custom-light: #7774c5;
$custom-dark: #000000;

JSON

{
  "hex": "#2840ab",
  "rgb": {
    "r": 40,
    "g": 64,
    "b": 171
  },
  "hsl": {
    "h": 229.008,
    "s": 62.085,
    "l": 41.373
  },
  "oklch": {
    "l": 0.42481,
    "c": 0.173,
    "h": 268.2
  },
  "luminance": 0.07058
}

Semantic roles & 50–950 ramp

primary

#2840AB

secondary

#C4B46A

accent

#C743E5

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #2840AB

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

Preview Lab → · Contrast checker → · Palette generator →