#2840A5#2840A5

#2840A5 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.9% C 0.165 H 268.1°. Best body text is #FFFFFF at 8.87:1 contrast (WCAG AA passes).

Color values

HEX	#2840A5
RGB	rgb(40, 64, 165)
HSL	hsl(228, 61%, 40%)
HSV	hsv(228, 76%, 65%)
CMYK	cmyk(75.8%, 61.2%, 0%, 35.3%)
CIE-LAB	lab(31.42, 27.60, -57.05)
CIE-LCH	lch(31.42, 63.38, 295.82°)
OKLab	oklab(41.94% -0.0055 -0.1648)
OKLCH	oklch(41.94% 0.165 268.1)
XYZ	xyz(9.4976, 6.8335, 36.4085)
Luminance	0.0683 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2840A5 #A58D28

analogous

#287EA5 #2840A5 #4E28A5

triadic

#2840A5 #A52840 #40A528

tetradic

#2840A5 #A5287E #A58D28 #28A54E

square

#2840A5 #A5287E #A58D28 #28A54E

split-complementary

#2840A5 #A54E28 #7EA528

monochromatic

#101A42 #1C2D74 #2840A5 #3B57CF #6C81DB

Accessibility & contrast

On white

8.87

#2840A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#2840A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2840A5

8.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2840A5	#FFFFFF	#000000	##FFFFFF
##2840A5	1.00	8.87	2.37	8.87
#FFFFFF	8.87	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A8

Deuteranopia (green-blind)

#0044A3

Tritanopia (blue-blind)

#005A6C

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #2840a5;
/* rgb */ color: rgb(40, 64, 165);
/* oklch */ color: oklch(41.9% 0.165 268.1);

Tailwind

colors: {
  custom: {
    50: '#7574c1',
    500: '#2840a5',
    950: '#000000',
  },
}

SCSS

$custom: #2840a5;
$custom-light: #7574c1;
$custom-dark: #000000;

JSON

{
  "hex": "#2840a5",
  "rgb": {
    "r": 40,
    "g": 64,
    "b": 165
  },
  "hsl": {
    "h": 228.48,
    "s": 60.976,
    "l": 40.196
  },
  "oklch": {
    "l": 0.41943,
    "c": 0.16489,
    "h": 268.1
  },
  "luminance": 0.06835
}

Semantic roles & 50–950 ramp

primary

#2840A5

secondary

#C2B067

accent

#C544E4

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #2840A5

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

Preview Lab → · Contrast checker → · Palette generator →