#2840B0#2840B0

#2840B0 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 42.9% C 0.180 H 268.2°. Best body text is #FFFFFF at 8.57:1 contrast (WCAG AA passes).

Color values

HEX	#2840B0
RGB	rgb(40, 64, 176)
HSL	hsl(229, 63%, 42%)
HSV	hsv(229, 77%, 69%)
CMYK	cmyk(77.3%, 63.6%, 0%, 31%)
CIE-LAB	lab(32.37, 31.73, -62.08)
CIE-LCH	lch(32.37, 69.72, 297.07°)
OKLab	oklab(42.94% -0.0057 -0.1796)
OKLCH	oklch(42.94% 0.18 268.2)
XYZ	xyz(10.5422, 7.2513, 41.9099)
Luminance	0.0725 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2840B0 #B09828

analogous

#2884B0 #2840B0 #5428B0

triadic

#2840B0 #B02840 #40B028

tetradic

#2840B0 #B02884 #B09828 #28B054

square

#2840B0 #B02884 #B09828 #28B054

split-complementary

#2840B0 #B05428 #84B028

monochromatic

#111C4C #1D2E7E #2840B0 #415BD4 #7386DF

Accessibility & contrast

On white

8.57

#2840B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#2840B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2840B0

8.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2840B0	#FFFFFF	#000000	##FFFFFF
##2840B0	1.00	8.57	2.45	8.57
#FFFFFF	8.57	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B4

Deuteranopia (green-blind)

#0046AE

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #2840b0;
/* rgb */ color: rgb(40, 64, 176);
/* oklch */ color: oklch(42.9% 0.180 268.2);

Tailwind

colors: {
  custom: {
    50: '#7874c9',
    500: '#2840b0',
    950: '#000000',
  },
}

SCSS

$custom: #2840b0;
$custom-light: #7874c9;
$custom-dark: #000000;

JSON

{
  "hex": "#2840b0",
  "rgb": {
    "r": 40,
    "g": 64,
    "b": 176
  },
  "hsl": {
    "h": 229.412,
    "s": 62.963,
    "l": 42.353
  },
  "oklch": {
    "l": 0.42937,
    "c": 0.17965,
    "h": 268.2
  },
  "luminance": 0.07252
}

Semantic roles & 50–950 ramp

primary

#2840B0

secondary

#C6B76D

accent

#C942E6

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #2840B0

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

Preview Lab → · Contrast checker → · Palette generator →