#283B70#283B70

#283B70 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.6% C 0.094 H 266.9°. Best body text is #FFFFFF at 10.77:1 contrast (WCAG AA passes).

Color values

HEX	#283B70
RGB	rgb(40, 59, 112)
HSL	hsl(224, 47%, 30%)
HSV	hsv(224, 64%, 44%)
CMYK	cmyk(64.3%, 47.3%, 0%, 56.1%)
CIE-LAB	lab(26.01, 10.71, -33.03)
CIE-LCH	lch(26.01, 34.72, 287.97°)
OKLab	oklab(36.59% -0.0051 -0.0942)
OKLCH	oklch(36.59% 0.094 266.9)
XYZ	xyz(5.3627, 4.7484, 15.9600)
Luminance	0.0475 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B70 #705D28

analogous

#285F70 #283B70 #392870

triadic

#283B70 #70283B #3B7028

tetradic

#283B70 #70285F #705D28 #287039

square

#283B70 #70285F #705D28 #287039

split-complementary

#283B70 #703928 #5F7028

monochromatic

#080C17 #182343 #283B70 #38539D #516FC1

Accessibility & contrast

On white

10.77

#283B70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#283B70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B70

10.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B70	#FFFFFF	#000000	##FFFFFF
##283B70	1.00	10.77	1.95	10.77
#FFFFFF	10.77	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224172

Deuteranopia (green-blind)

#173B6F

Tritanopia (blue-blind)

#004750

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283b70;
/* rgb */ color: rgb(40, 59, 112);
/* oklch */ color: oklch(36.6% 0.094 266.9);

Tailwind

colors: {
  custom: {
    50: '#697099',
    500: '#283b70',
    950: '#000000',
  },
}

SCSS

$custom: #283b70;
$custom-light: #697099;
$custom-dark: #000000;

JSON

{
  "hex": "#283b70",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 112
  },
  "hsl": {
    "h": 224.167,
    "s": 47.368,
    "l": 29.804
  },
  "oklch": {
    "l": 0.3659,
    "c": 0.09439,
    "h": 266.9
  },
  "luminance": 0.04749
}

Semantic roles & 50–950 ramp

primary

#283B70

secondary

#A28D51

accent

#B451D7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283B70

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

Preview Lab → · Contrast checker → · Palette generator →