#283F70#283F70

#283F70 is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.5% C 0.089 H 263.7°. Best body text is #FFFFFF at 10.32:1 contrast (WCAG AA passes).

Color values

HEX	#283F70
RGB	rgb(40, 63, 112)
HSL	hsl(221, 47%, 30%)
HSV	hsv(221, 64%, 44%)
CMYK	cmyk(64.3%, 43.7%, 0%, 56.1%)
CIE-LAB	lab(27.23, 7.95, -31.08)
CIE-LCH	lch(27.23, 32.08, 284.35°)
OKLab	oklab(37.53% -0.0097 -0.0885)
OKLCH	oklch(37.53% 0.089 263.7)
XYZ	xyz(5.5762, 5.1755, 16.0312)
Luminance	0.0518 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F70 #705928

analogous

#286370 #283F70 #352870

triadic

#283F70 #70283F #3F7028

tetradic

#283F70 #702863 #705928 #287035

square

#283F70 #702863 #705928 #287035

split-complementary

#283F70 #703528 #637028

monochromatic

#080D17 #182643 #283F70 #38589D #5175C1

Accessibility & contrast

On white

10.32

#283F70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#283F70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F70

10.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F70	#FFFFFF	#000000	##FFFFFF
##283F70	1.00	10.32	2.04	10.32
#FFFFFF	10.32	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#294472

Deuteranopia (green-blind)

#1F3D6F

Tritanopia (blue-blind)

#004A52

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283f70;
/* rgb */ color: rgb(40, 63, 112);
/* oklch */ color: oklch(37.5% 0.089 263.7);

Tailwind

colors: {
  custom: {
    50: '#697399',
    500: '#283f70',
    950: '#000000',
  },
}

SCSS

$custom: #283f70;
$custom-light: #697399;
$custom-dark: #000000;

JSON

{
  "hex": "#283f70",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 112
  },
  "hsl": {
    "h": 220.833,
    "s": 47.368,
    "l": 29.804
  },
  "oklch": {
    "l": 0.3753,
    "c": 0.089,
    "h": 263.7
  },
  "luminance": 0.05176
}

Semantic roles & 50–950 ramp

primary

#283F70

secondary

#A28851

accent

#AC51D7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07080E

muted

#7A7B7E

Preview Lab

Preview with #283F70

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

Preview Lab → · Contrast checker → · Palette generator →