#28579B#28579B

#28579B is a mid, vivid blue. Relative luminance 0.096; OKLCH L 46.1% C 0.122 H 257.9°. Best body text is #FFFFFF at 7.18:1 contrast (WCAG AA passes).

Color values

HEX	#28579B
RGB	rgb(40, 87, 155)
HSL	hsl(215, 59%, 38%)
HSV	hsv(215, 74%, 61%)
CMYK	cmyk(74.2%, 43.9%, 0%, 39.2%)
CIE-LAB	lab(37.18, 8.38, -41.74)
CIE-LCH	lch(37.18, 42.57, 281.36°)
OKLab	oklab(46.08% -0.0255 -0.1194)
OKLCH	oklch(46.08% 0.122 257.9)
XYZ	xyz(10.1975, 9.6329, 32.3259)
Luminance	0.0963 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28579B #9B6C28

analogous

#28909B #28579B #32289B

triadic

#28579B #9B2857 #579B28

tetradic

#28579B #9B2890 #9B6C28 #289B32

square

#28579B #9B2890 #9B6C28 #289B32

split-complementary

#28579B #9B3228 #909B28

monochromatic

#0F203A #1B3C6A #28579B #3572CB #6694D7

Accessibility & contrast

On white

7.18

#28579B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.93

#28579B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28579B

7.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28579B	#FFFFFF	#000000	##FFFFFF
##28579B	1.00	7.18	2.93	7.18
#FFFFFF	7.18	1.00	21.00	1.00
#000000	2.93	21.00	1.00	21.00
##FFFFFF	7.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#365D9E

Deuteranopia (green-blind)

#21539A

Tritanopia (blue-blind)

#006771

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #28579b;
/* rgb */ color: rgb(40, 87, 155);
/* oklch */ color: oklch(46.1% 0.122 257.9);

Tailwind

colors: {
  custom: {
    50: '#7285b9',
    500: '#28579b',
    950: '#000000',
  },
}

SCSS

$custom: #28579b;
$custom-light: #7285b9;
$custom-dark: #000000;

JSON

{
  "hex": "#28579b",
  "rgb": {
    "r": 40,
    "g": 87,
    "b": 155
  },
  "hsl": {
    "h": 215.478,
    "s": 58.974,
    "l": 38.235
  },
  "oklch": {
    "l": 0.46081,
    "c": 0.12209,
    "h": 257.9
  },
  "luminance": 0.09634
}

Semantic roles & 50–950 ramp

primary

#28579B

secondary

#BD9861

accent

#A246E2

background

#F7F8FB

surface

#EDEFF6

border

#C8CAD0

text

#090B11

muted

#7B7C80

Preview Lab

Preview with #28579B

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

Preview Lab → · Contrast checker → · Palette generator →