#2728B4#2728B4

#2728B4 is a dark, highly saturated blue. Relative luminance 0.052; OKLCH L 39.5% C 0.210 H 271.1°. Best body text is #FFFFFF at 10.25:1 contrast (WCAG AA passes).

Color values

HEX	#2728B4
RGB	rgb(39, 40, 180)
HSL	hsl(240, 64%, 43%)
HSV	hsv(240, 78%, 71%)
CMYK	cmyk(78.3%, 77.8%, 0%, 29.4%)
CIE-LAB	lab(27.42, 47.56, -72.63)
CIE-LCH	lch(27.42, 86.82, 303.22°)
OKLab	oklab(39.47% 0.0041 -0.2103)
OKLCH	oklch(39.47% 0.21 271.1)
XYZ	xyz(9.8309, 5.2431, 43.6651)
Luminance	0.0524 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2728B4 #B4B327

analogous

#276FB4 #2728B4 #6C27B4

triadic

#2728B4 #B42728 #28B427

tetradic

#2728B4 #B4276F #B4B327 #27B46C

square

#2728B4 #B4276F #B4B327 #27B46C

split-complementary

#2728B4 #B46C27 #6FB427

monochromatic

#11124F #1C1D82 #2728B4 #4243D6 #7475E1

Accessibility & contrast

On white

10.25

#2728B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#2728B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2728B4

10.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2728B4	#FFFFFF	#000000	##FFFFFF
##2728B4	1.00	10.25	2.05	10.25
#FFFFFF	10.25	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048B8

Deuteranopia (green-blind)

#0039B2

Tritanopia (blue-blind)

#00536D

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #2728b4;
/* rgb */ color: rgb(39, 40, 180);
/* oklch */ color: oklch(39.5% 0.210 271.1);

Tailwind

colors: {
  custom: {
    50: '#7b65cc',
    500: '#2728b4',
    950: '#000000',
  },
}

SCSS

$custom: #2728b4;
$custom-light: #7b65cc;
$custom-dark: #000000;

JSON

{
  "hex": "#2728b4",
  "rgb": {
    "r": 39,
    "g": 40,
    "b": 180
  },
  "hsl": {
    "h": 239.574,
    "s": 64.384,
    "l": 42.941
  },
  "oklch": {
    "l": 0.39469,
    "c": 0.21034,
    "h": 271.1
  },
  "luminance": 0.05244
}

Semantic roles & 50–950 ramp

primary

#2728B4

secondary

#C8C86F

accent

#E640E7

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0614

muted

#7C7A82

Preview Lab

Preview with #2728B4

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

Preview Lab → · Contrast checker → · Palette generator →