#283D8E#283D8E

#283D8E is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.4% C 0.137 H 268.4°. Best body text is #FFFFFF at 9.77:1 contrast (WCAG AA passes).

Color values

HEX	#283D8E
RGB	rgb(40, 61, 142)
HSL	hsl(228, 56%, 36%)
HSV	hsv(228, 72%, 56%)
CMYK	cmyk(71.8%, 57%, 0%, 44.3%)
CIE-LAB	lab(28.75, 20.85, -47.41)
CIE-LCH	lch(28.75, 51.79, 293.74°)
OKLab	oklab(39.36% -0.0038 -0.1365)
OKLCH	oklch(39.36% 0.137 268.4)
XYZ	xyz(7.4246, 5.7409, 26.3028)
Luminance	0.0574 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D8E #8E7928

analogous

#28708E #283D8E #46288E

triadic

#283D8E #8E283D #3D8E28

tetradic

#283D8E #8E2870 #8E7928 #288E46

square

#283D8E #8E2870 #8E7928 #288E46

split-complementary

#283D8E #8E4628 #708E28

monochromatic

#0D142F #1B285E #283D8E #3552BE #5F76D2

Accessibility & contrast

On white

9.77

#283D8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#283D8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D8E

9.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D8E	#FFFFFF	#000000	##FFFFFF
##283D8E	1.00	9.77	2.15	9.77
#FFFFFF	9.77	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004991

Deuteranopia (green-blind)

#003F8C

Tritanopia (blue-blind)

#00515F

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #283d8e;
/* rgb */ color: rgb(40, 61, 142);
/* oklch */ color: oklch(39.4% 0.137 268.4);

Tailwind

colors: {
  custom: {
    50: '#7072b0',
    500: '#283d8e',
    950: '#000000',
  },
}

SCSS

$custom: #283d8e;
$custom-light: #7072b0;
$custom-dark: #000000;

JSON

{
  "hex": "#283d8e",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 142
  },
  "hsl": {
    "h": 227.647,
    "s": 56.044,
    "l": 35.686
  },
  "oklch": {
    "l": 0.3936,
    "c": 0.13656,
    "h": 268.4
  },
  "luminance": 0.05742
}

Semantic roles & 50–950 ramp

primary

#283D8E

secondary

#B7A45B

accent

#C048DF

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283D8E

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

Preview Lab → · Contrast checker → · Palette generator →