#283D9E#283D9E

#283D9E is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.7% C 0.159 H 268.8°. Best body text is #FFFFFF at 9.33:1 contrast (WCAG AA passes).

Color values

HEX	#283D9E
RGB	rgb(40, 61, 158)
HSL	hsl(229, 60%, 39%)
HSV	hsv(229, 75%, 62%)
CMYK	cmyk(74.7%, 61.4%, 0%, 38%)
CIE-LAB	lab(30.05, 26.96, -55.07)
CIE-LCH	lch(30.05, 61.31, 296.08°)
OKLab	oklab(40.74% -0.0034 -0.159)
OKLCH	oklch(40.74% 0.159 268.8)
XYZ	xyz(8.7132, 6.2563, 33.0895)
Luminance	0.0626 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D9E #9E8928

analogous

#28789E #283D9E #4E289E

triadic

#283D9E #9E283D #3D9E28

tetradic

#283D9E #9E2878 #9E8928 #289E4E

square

#283D9E #9E2878 #9E8928 #289E4E

split-complementary

#283D9E #9E4E28 #789E28

monochromatic

#0F173C #1C2A6D #283D9E #3751CC #687CD9

Accessibility & contrast

On white

9.33

#283D9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#283D9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D9E

9.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D9E	#FFFFFF	#000000	##FFFFFF
##283D9E	1.00	9.33	2.25	9.33
#FFFFFF	9.33	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA1

Deuteranopia (green-blind)

#00419C

Tritanopia (blue-blind)

#005667

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #283d9e;
/* rgb */ color: rgb(40, 61, 158);
/* oklch */ color: oklch(40.7% 0.159 268.8);

Tailwind

colors: {
  custom: {
    50: '#7472bb',
    500: '#283d9e',
    950: '#000000',
  },
}

SCSS

$custom: #283d9e;
$custom-light: #7472bb;
$custom-dark: #000000;

JSON

{
  "hex": "#283d9e",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 158
  },
  "hsl": {
    "h": 229.322,
    "s": 59.596,
    "l": 38.824
  },
  "oklch": {
    "l": 0.40739,
    "c": 0.15906,
    "h": 268.8
  },
  "luminance": 0.06257
}

Semantic roles & 50–950 ramp

primary

#283D9E

secondary

#BFAE63

accent

#C745E3

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #283D9E

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

Preview Lab → · Contrast checker → · Palette generator →