#283D9F#283D9F

#283D9F is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.8% C 0.160 H 268.8°. Best body text is #FFFFFF at 9.30:1 contrast (WCAG AA passes).

Color values

HEX	#283D9F
RGB	rgb(40, 61, 159)
HSL	hsl(229, 60%, 39%)
HSV	hsv(229, 75%, 62%)
CMYK	cmyk(74.8%, 61.6%, 0%, 37.6%)
CIE-LAB	lab(30.13, 27.34, -55.54)
CIE-LCH	lch(30.13, 61.90, 296.21°)
OKLab	oklab(40.83% -0.0034 -0.1604)
OKLCH	oklch(40.83% 0.16 268.8)
XYZ	xyz(8.7997, 6.2909, 33.5447)
Luminance	0.0629 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D9F #9F8A28

analogous

#28799F #283D9F #4F289F

triadic

#283D9F #9F283D #3D9F28

tetradic

#283D9F #9F2879 #9F8A28 #289F4F

square

#283D9F #9F2879 #9F8A28 #289F4F

split-complementary

#283D9F #9F4F28 #799F28

monochromatic

#0F173D #1C2A6E #283D9F #3752CD #687CD9

Accessibility & contrast

On white

9.30

#283D9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#283D9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D9F

9.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D9F	#FFFFFF	#000000	##FFFFFF
##283D9F	1.00	9.30	2.26	9.30
#FFFFFF	9.30	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA2

Deuteranopia (green-blind)

#00429D

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #283d9f;
/* rgb */ color: rgb(40, 61, 159);
/* oklch */ color: oklch(40.8% 0.160 268.8);

Tailwind

colors: {
  custom: {
    50: '#7472bc',
    500: '#283d9f',
    950: '#000000',
  },
}

SCSS

$custom: #283d9f;
$custom-light: #7472bc;
$custom-dark: #000000;

JSON

{
  "hex": "#283d9f",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 159
  },
  "hsl": {
    "h": 229.412,
    "s": 59.799,
    "l": 39.02
  },
  "oklch": {
    "l": 0.40828,
    "c": 0.16043,
    "h": 268.8
  },
  "luminance": 0.06292
}

Semantic roles & 50–950 ramp

primary

#283D9F

secondary

#BFAF64

accent

#C745E3

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #283D9F

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

Preview Lab → · Contrast checker → · Palette generator →