#28539B#28539B

#28539B is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.2% C 0.127 H 260.1°. Best body text is #FFFFFF at 7.50:1 contrast (WCAG AA passes).

Color values

HEX	#28539B
RGB	rgb(40, 83, 155)
HSL	hsl(218, 59%, 38%)
HSV	hsv(218, 74%, 61%)
CMYK	cmyk(74.2%, 46.5%, 0%, 39.2%)
CIE-LAB	lab(35.99, 11.02, -43.64)
CIE-LCH	lch(35.99, 45.01, 284.17°)
OKLab	oklab(45.17% -0.0218 -0.125)
OKLCH	oklch(45.17% 0.127 260.1)
XYZ	xyz(9.8826, 9.0031, 32.2209)
Luminance	0.0900 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28539B #9B7028

analogous

#288C9B #28539B #36289B

triadic

#28539B #9B2853 #539B28

tetradic

#28539B #9B288C #9B7028 #289B36

square

#28539B #9B288C #9B7028 #289B36

split-complementary

#28539B #9B3628 #8C9B28

monochromatic

#0F1F3A #1B396A #28539B #356DCB #6690D7

Accessibility & contrast

On white

7.50

#28539B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#28539B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28539B

7.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28539B	#FFFFFF	#000000	##FFFFFF
##28539B	1.00	7.50	2.80	7.50
#FFFFFF	7.50	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E5A9E

Deuteranopia (green-blind)

#15509A

Tritanopia (blue-blind)

#00646F

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #28539b;
/* rgb */ color: rgb(40, 83, 155);
/* oklch */ color: oklch(45.2% 0.127 260.1);

Tailwind

colors: {
  custom: {
    50: '#7282b9',
    500: '#28539b',
    950: '#000000',
  },
}

SCSS

$custom: #28539b;
$custom-light: #7282b9;
$custom-dark: #000000;

JSON

{
  "hex": "#28539b",
  "rgb": {
    "r": 40,
    "g": 83,
    "b": 155
  },
  "hsl": {
    "h": 217.565,
    "s": 58.974,
    "l": 38.235
  },
  "oklch": {
    "l": 0.45166,
    "c": 0.12694,
    "h": 260.1
  },
  "luminance": 0.09004
}

Semantic roles & 50–950 ramp

primary

#28539B

secondary

#BD9B61

accent

#A846E2

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A11

muted

#7B7C80

Preview Lab

Preview with #28539B

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

Preview Lab → · Contrast checker → · Palette generator →