#2728B3#2728B3

#2728B3 is a dark, highly saturated blue. Relative luminance 0.052; OKLCH L 39.4% C 0.209 H 271.2°. Best body text is #FFFFFF at 10.29:1 contrast (WCAG AA passes).

Color values

HEX	#2728B3
RGB	rgb(39, 40, 179)
HSL	hsl(240, 64%, 43%)
HSV	hsv(240, 78%, 70%)
CMYK	cmyk(78.2%, 77.7%, 0%, 29.8%)
CIE-LAB	lab(27.30, 47.24, -72.22)
CIE-LCH	lch(27.30, 86.30, 303.19°)
OKLab	oklab(39.36% 0.0043 -0.2091)
OKLCH	oklch(39.36% 0.209 271.2)
XYZ	xyz(9.7294, 5.2025, 43.1305)
Luminance	0.0520 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2728B3 #B3B227

analogous

#276EB3 #2728B3 #6C27B3

triadic

#2728B3 #B32728 #28B327

tetradic

#2728B3 #B3276E #B3B227 #27B36C

square

#2728B3 #B3276E #B3B227 #27B36C

split-complementary

#2728B3 #B36C27 #6EB327

monochromatic

#11124E #1C1D81 #2728B3 #4143D6 #7475E1

Accessibility & contrast

On white

10.29

#2728B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#2728B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2728B3

10.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2728B3	#FFFFFF	#000000	##FFFFFF
##2728B3	1.00	10.29	2.04	10.29
#FFFFFF	10.29	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047B7

Deuteranopia (green-blind)

#0039B1

Tritanopia (blue-blind)

#00526D

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #2728b3;
/* rgb */ color: rgb(39, 40, 179);
/* oklch */ color: oklch(39.4% 0.209 271.2);

Tailwind

colors: {
  custom: {
    50: '#7a64cb',
    500: '#2728b3',
    950: '#000000',
  },
}

SCSS

$custom: #2728b3;
$custom-light: #7a64cb;
$custom-dark: #000000;

JSON

{
  "hex": "#2728b3",
  "rgb": {
    "r": 39,
    "g": 40,
    "b": 179
  },
  "hsl": {
    "h": 239.571,
    "s": 64.22,
    "l": 42.745
  },
  "oklch": {
    "l": 0.39357,
    "c": 0.20914,
    "h": 271.2
  },
  "luminance": 0.05204
}

Semantic roles & 50–950 ramp

primary

#2728B3

secondary

#C8C76E

accent

#E641E7

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #2728B3

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

Preview Lab → · Contrast checker → · Palette generator →