#283C9F#283C9F

#283C9F is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.6% C 0.162 H 269.0°. Best body text is #FFFFFF at 9.39:1 contrast (WCAG AA passes).

Color values

HEX	#283C9F
RGB	rgb(40, 60, 159)
HSL	hsl(230, 60%, 39%)
HSV	hsv(230, 75%, 62%)
CMYK	cmyk(74.8%, 62.3%, 0%, 37.6%)
CIE-LAB	lab(29.87, 28.00, -55.96)
CIE-LCH	lch(29.87, 62.58, 296.58°)
OKLab	oklab(40.64% -0.0027 -0.1616)
OKLCH	oklch(40.64% 0.162 269)
XYZ	xyz(8.7468, 6.1851, 33.5270)
Luminance	0.0619 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C9F #9F8B28

analogous

#28789F #283C9F #50289F

triadic

#283C9F #9F283C #3C9F28

tetradic

#283C9F #9F2878 #9F8B28 #289F50

square

#283C9F #9F2878 #9F8B28 #289F50

split-complementary

#283C9F #9F5028 #789F28

monochromatic

#0F173D #1C2A6E #283C9F #3751CD #687BD9

Accessibility & contrast

On white

9.39

#283C9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#283C9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C9F

9.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C9F	#FFFFFF	#000000	##FFFFFF
##283C9F	1.00	9.39	2.24	9.39
#FFFFFF	9.39	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA2

Deuteranopia (green-blind)

#00419D

Tritanopia (blue-blind)

#005567

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #283c9f;
/* rgb */ color: rgb(40, 60, 159);
/* oklch */ color: oklch(40.6% 0.162 269.0);

Tailwind

colors: {
  custom: {
    50: '#7471bc',
    500: '#283c9f',
    950: '#000000',
  },
}

SCSS

$custom: #283c9f;
$custom-light: #7471bc;
$custom-dark: #000000;

JSON

{
  "hex": "#283c9f",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 159
  },
  "hsl": {
    "h": 229.916,
    "s": 59.799,
    "l": 39.02
  },
  "oklch": {
    "l": 0.40635,
    "c": 0.16167,
    "h": 269
  },
  "luminance": 0.06186
}

Semantic roles & 50–950 ramp

primary

#283C9F

secondary

#BFB064

accent

#C845E3

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #283C9F

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

Preview Lab → · Contrast checker → · Palette generator →