#2840A8#2840A8

#2840A8 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.2% C 0.169 H 268.1°. Best body text is #FFFFFF at 8.79:1 contrast (WCAG AA passes).

Color values

HEX	#2840A8
RGB	rgb(40, 64, 168)
HSL	hsl(229, 62%, 41%)
HSV	hsv(229, 76%, 66%)
CMYK	cmyk(76.2%, 61.9%, 0%, 34.1%)
CIE-LAB	lab(31.68, 28.74, -58.44)
CIE-LCH	lch(31.68, 65.12, 296.19°)
OKLab	oklab(42.21% -0.0055 -0.1689)
OKLCH	oklch(42.21% 0.169 268.1)
XYZ	xyz(9.7739, 6.9440, 37.8634)
Luminance	0.0694 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2840A8 #A89028

analogous

#2880A8 #2840A8 #5028A8

triadic

#2840A8 #A82840 #40A828

tetradic

#2840A8 #A82880 #A89028 #28A850

square

#2840A8 #A82880 #A89028 #28A850

split-complementary

#2840A8 #A85028 #80A828

monochromatic

#101A45 #1C2D77 #2840A8 #3D58D1 #6E83DC

Accessibility & contrast

On white

8.79

#2840A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#2840A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2840A8

8.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2840A8	#FFFFFF	#000000	##FFFFFF
##2840A8	1.00	8.79	2.39	8.79
#FFFFFF	8.79	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AB

Deuteranopia (green-blind)

#0045A6

Tritanopia (blue-blind)

#005B6E

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #2840a8;
/* rgb */ color: rgb(40, 64, 168);
/* oklch */ color: oklch(42.2% 0.169 268.1);

Tailwind

colors: {
  custom: {
    50: '#7674c3',
    500: '#2840a8',
    950: '#000000',
  },
}

SCSS

$custom: #2840a8;
$custom-light: #7674c3;
$custom-dark: #000000;

JSON

{
  "hex": "#2840a8",
  "rgb": {
    "r": 40,
    "g": 64,
    "b": 168
  },
  "hsl": {
    "h": 228.75,
    "s": 61.538,
    "l": 40.784
  },
  "oklch": {
    "l": 0.42211,
    "c": 0.16896,
    "h": 268.1
  },
  "luminance": 0.06945
}

Semantic roles & 50–950 ramp

primary

#2840A8

secondary

#C3B269

accent

#C643E5

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #2840A8

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

Preview Lab → · Contrast checker → · Palette generator →