#283A71#283A71

#283A71 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.4% C 0.097 H 267.8°. Best body text is #FFFFFF at 10.86:1 contrast (WCAG AA passes).

Color values

HEX	#283A71
RGB	rgb(40, 58, 113)
HSL	hsl(225, 48%, 30%)
HSV	hsv(225, 65%, 44%)
CMYK	cmyk(64.6%, 48.7%, 0%, 55.7%)
CIE-LAB	lab(25.77, 11.79, -34.04)
CIE-LCH	lch(25.77, 36.03, 289.10°)
OKLab	oklab(36.43% -0.0038 -0.0972)
OKLCH	oklch(36.43% 0.097 267.8)
XYZ	xyz(5.3678, 4.6690, 16.2379)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A71 #715F28

analogous

#285F71 #283A71 #3A2871

triadic

#283A71 #71283A #3A7128

tetradic

#283A71 #71285F #715F28 #28713A

square

#283A71 #71285F #715F28 #28713A

split-complementary

#283A71 #713A28 #5F7128

monochromatic

#080C17 #182344 #283A71 #38519E #526DC2

Accessibility & contrast

On white

10.86

#283A71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#283A71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A71

10.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A71	#FFFFFF	#000000	##FFFFFF
##283A71	1.00	10.86	1.93	10.86
#FFFFFF	10.86	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F4173

Deuteranopia (green-blind)

#133A70

Tritanopia (blue-blind)

#004650

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #283a71;
/* rgb */ color: rgb(40, 58, 113);
/* oklch */ color: oklch(36.4% 0.097 267.8);

Tailwind

colors: {
  custom: {
    50: '#6a6f9a',
    500: '#283a71',
    950: '#000000',
  },
}

SCSS

$custom: #283a71;
$custom-light: #6a6f9a;
$custom-dark: #000000;

JSON

{
  "hex": "#283a71",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 113
  },
  "hsl": {
    "h": 225.205,
    "s": 47.712,
    "l": 30
  },
  "oklch": {
    "l": 0.36431,
    "c": 0.09732,
    "h": 267.8
  },
  "luminance": 0.04669
}

Semantic roles & 50–950 ramp

primary

#283A71

secondary

#A38F52

accent

#B650D7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283A71

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

Preview Lab → · Contrast checker → · Palette generator →