#283D70#283D70

#283D70 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.1% C 0.092 H 265.4°. Best body text is #FFFFFF at 10.54:1 contrast (WCAG AA passes).

Color values

HEX	#283D70
RGB	rgb(40, 61, 112)
HSL	hsl(223, 47%, 30%)
HSV	hsv(223, 64%, 44%)
CMYK	cmyk(64.3%, 45.5%, 0%, 56.1%)
CIE-LAB	lab(26.61, 9.33, -32.06)
CIE-LCH	lch(26.61, 33.38, 286.22°)
OKLab	oklab(37.06% -0.0074 -0.0914)
OKLCH	oklch(37.06% 0.092 265.4)
XYZ	xyz(5.4674, 4.9580, 15.9950)
Luminance	0.0496 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D70 #705B28

analogous

#286170 #283D70 #372870

triadic

#283D70 #70283D #3D7028

tetradic

#283D70 #702861 #705B28 #287037

square

#283D70 #702861 #705B28 #287037

split-complementary

#283D70 #703728 #617028

monochromatic

#080C17 #182443 #283D70 #38569D #5172C1

Accessibility & contrast

On white

10.54

#283D70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#283D70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D70

10.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D70	#FFFFFF	#000000	##FFFFFF
##283D70	1.00	10.54	1.99	10.54
#FFFFFF	10.54	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#264272

Deuteranopia (green-blind)

#1B3C6F

Tritanopia (blue-blind)

#004851

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283d70;
/* rgb */ color: rgb(40, 61, 112);
/* oklch */ color: oklch(37.1% 0.092 265.4);

Tailwind

colors: {
  custom: {
    50: '#697299',
    500: '#283d70',
    950: '#000000',
  },
}

SCSS

$custom: #283d70;
$custom-light: #697299;
$custom-dark: #000000;

JSON

{
  "hex": "#283d70",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 112
  },
  "hsl": {
    "h": 222.5,
    "s": 47.368,
    "l": 29.804
  },
  "oklch": {
    "l": 0.37057,
    "c": 0.09166,
    "h": 265.4
  },
  "luminance": 0.04958
}

Semantic roles & 50–950 ramp

primary

#283D70

secondary

#A28B51

accent

#B051D7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283D70

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

Preview Lab → · Contrast checker → · Palette generator →