#283D7A#283D7A

#283D7A is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.8% C 0.107 H 266.9°. Best body text is #FFFFFF at 10.30:1 contrast (WCAG AA passes).

Color values

HEX	#283D7A
RGB	rgb(40, 61, 122)
HSL	hsl(225, 51%, 32%)
HSV	hsv(225, 67%, 48%)
CMYK	cmyk(67.2%, 50%, 0%, 52.2%)
CIE-LAB	lab(27.28, 13.15, -37.32)
CIE-LCH	lch(27.28, 39.57, 289.41°)
OKLab	oklab(37.78% -0.0057 -0.1068)
OKLCH	oklch(37.78% 0.107 266.9)
XYZ	xyz(6.0555, 5.1932, 19.0918)
Luminance	0.0519 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D7A #7A6528

analogous

#28667A #283D7A #3C287A

triadic

#283D7A #7A283D #3D7A28

tetradic

#283D7A #7A2866 #7A6528 #287A3C

square

#283D7A #7A2866 #7A6528 #287A3C

split-complementary

#283D7A #7A3C28 #667A28

monochromatic

#0A0F1E #19264C #283D7A #3754A8 #5572C7

Accessibility & contrast

On white

10.30

#283D7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#283D7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D7A

10.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D7A	#FFFFFF	#000000	##FFFFFF
##283D7A	1.00	10.30	2.04	10.30
#FFFFFF	10.30	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D447C

Deuteranopia (green-blind)

#0C3D79

Tritanopia (blue-blind)

#004B55

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283d7a;
/* rgb */ color: rgb(40, 61, 122);
/* oklch */ color: oklch(37.8% 0.107 266.9);

Tailwind

colors: {
  custom: {
    50: '#6b72a1',
    500: '#283d7a',
    950: '#000000',
  },
}

SCSS

$custom: #283d7a;
$custom-light: #6b72a1;
$custom-dark: #000000;

JSON

{
  "hex": "#283d7a",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 122
  },
  "hsl": {
    "h": 224.634,
    "s": 50.617,
    "l": 31.765
  },
  "oklch": {
    "l": 0.37779,
    "c": 0.107,
    "h": 266.9
  },
  "luminance": 0.05194
}

Semantic roles & 50–950 ramp

primary

#283D7A

secondary

#AC9552

accent

#B64EDA

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070F

muted

#7A7A7E

Preview Lab

Preview with #283D7A

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

Preview Lab → · Contrast checker → · Palette generator →