#283D9A#283D9A

#283D9A is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.4% C 0.154 H 268.7°. Best body text is #FFFFFF at 9.44:1 contrast (WCAG AA passes).

Color values

HEX	#283D9A
RGB	rgb(40, 61, 154)
HSL	hsl(229, 59%, 38%)
HSV	hsv(229, 74%, 60%)
CMYK	cmyk(74%, 60.4%, 0%, 39.6%)
CIE-LAB	lab(29.72, 25.44, -53.18)
CIE-LCH	lch(29.72, 58.96, 295.56°)
OKLab	oklab(40.39% -0.0034 -0.1535)
OKLCH	oklch(40.39% 0.154 268.7)
XYZ	xyz(8.3745, 6.1208, 31.3057)
Luminance	0.0612 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D9A #9A8528

analogous

#28769A #283D9A #4C289A

triadic

#283D9A #9A283D #3D9A28

tetradic

#283D9A #9A2876 #9A8528 #289A4C

square

#283D9A #9A2876 #9A8528 #289A4C

split-complementary

#283D9A #9A4C28 #769A28

monochromatic

#0F1739 #1B2A69 #283D9A #3550CA #657AD7

Accessibility & contrast

On white

9.44

#283D9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#283D9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D9A

9.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D9A	#FFFFFF	#000000	##FFFFFF
##283D9A	1.00	9.44	2.22	9.44
#FFFFFF	9.44	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9D

Deuteranopia (green-blind)

#004198

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #283d9a;
/* rgb */ color: rgb(40, 61, 154);
/* oklch */ color: oklch(40.4% 0.154 268.7);

Tailwind

colors: {
  custom: {
    50: '#7372b9',
    500: '#283d9a',
    950: '#000000',
  },
}

SCSS

$custom: #283d9a;
$custom-light: #7372b9;
$custom-dark: #000000;

JSON

{
  "hex": "#283d9a",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 154
  },
  "hsl": {
    "h": 228.947,
    "s": 58.763,
    "l": 38.039
  },
  "oklch": {
    "l": 0.40385,
    "c": 0.15353,
    "h": 268.7
  },
  "luminance": 0.06122
}

Semantic roles & 50–950 ramp

primary

#283D9A

secondary

#BDAC61

accent

#C546E2

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #283D9A

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

Preview Lab → · Contrast checker → · Palette generator →