#28397B#28397B

#28397B is a dark, moderate blue. Relative luminance 0.048; OKLCH L 37.0% C 0.114 H 269.3°. Best body text is #FFFFFF at 10.71:1 contrast (WCAG AA passes).

Color values

HEX	#28397B
RGB	rgb(40, 57, 123)
HSL	hsl(228, 51%, 32%)
HSV	hsv(228, 67%, 48%)
CMYK	cmyk(67.5%, 53.7%, 0%, 51.8%)
CIE-LAB	lab(26.18, 16.31, -39.73)
CIE-LCH	lch(26.18, 42.94, 292.32°)
OKLab	oklab(36.97% -0.0014 -0.114)
OKLCH	oklch(36.97% 0.114 269.3)
XYZ	xyz(5.9121, 4.8069, 19.3513)
Luminance	0.0481 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28397B #7B6A28

analogous

#28637B #28397B #41287B

triadic

#28397B #7B2839 #397B28

tetradic

#28397B #7B2863 #7B6A28 #287B41

square

#28397B #7B2863 #7B6A28 #287B41

split-complementary

#28397B #7B4128 #637B28

monochromatic

#0A0E1F #19244D #28397B #374EA9 #566DC8

Accessibility & contrast

On white

10.71

#28397B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#28397B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28397B

10.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28397B	#FFFFFF	#000000	##FFFFFF
##28397B	1.00	10.71	1.96	10.71
#FFFFFF	10.71	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#11427D

Deuteranopia (green-blind)

#003A7A

Tritanopia (blue-blind)

#004854

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #28397b;
/* rgb */ color: rgb(40, 57, 123);
/* oklch */ color: oklch(37.0% 0.114 269.3);

Tailwind

colors: {
  custom: {
    50: '#6c6fa2',
    500: '#28397b',
    950: '#000000',
  },
}

SCSS

$custom: #28397b;
$custom-light: #6c6fa2;
$custom-dark: #000000;

JSON

{
  "hex": "#28397b",
  "rgb": {
    "r": 40,
    "g": 57,
    "b": 123
  },
  "hsl": {
    "h": 227.711,
    "s": 50.92,
    "l": 31.961
  },
  "oklch": {
    "l": 0.36966,
    "c": 0.11399,
    "h": 269.3
  },
  "luminance": 0.04807
}

Semantic roles & 50–950 ramp

primary

#28397B

secondary

#AD9A52

accent

#BE4DDA

background

#F6F6FA

surface

#ECECF3

border

#C7C7CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #28397B

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

Preview Lab → · Contrast checker → · Palette generator →