#283C9E#283C9E

#283C9E is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.5% C 0.160 H 269.0°. Best body text is #FFFFFF at 9.42:1 contrast (WCAG AA passes).

Color values

HEX	#283C9E
RGB	rgb(40, 60, 158)
HSL	hsl(230, 60%, 39%)
HSV	hsv(230, 75%, 62%)
CMYK	cmyk(74.7%, 62%, 0%, 38%)
CIE-LAB	lab(29.79, 27.63, -55.49)
CIE-LCH	lch(29.79, 61.99, 296.47°)
OKLab	oklab(40.54% -0.0027 -0.1603)
OKLCH	oklch(40.54% 0.16 269)
XYZ	xyz(8.6604, 6.1505, 33.0719)
Luminance	0.0615 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C9E #9E8A28

analogous

#28779E #283C9E #4F289E

triadic

#283C9E #9E283C #3C9E28

tetradic

#283C9E #9E2877 #9E8A28 #289E4F

square

#283C9E #9E2877 #9E8A28 #289E4F

split-complementary

#283C9E #9E4F28 #779E28

monochromatic

#0F173C #1C296D #283C9E #3750CC #687BD9

Accessibility & contrast

On white

9.42

#283C9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#283C9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C9E

9.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C9E	#FFFFFF	#000000	##FFFFFF
##283C9E	1.00	9.42	2.23	9.42
#FFFFFF	9.42	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA1

Deuteranopia (green-blind)

#00419C

Tritanopia (blue-blind)

#005567

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #283c9e;
/* rgb */ color: rgb(40, 60, 158);
/* oklch */ color: oklch(40.5% 0.160 269.0);

Tailwind

colors: {
  custom: {
    50: '#7471bb',
    500: '#283c9e',
    950: '#000000',
  },
}

SCSS

$custom: #283c9e;
$custom-light: #7471bb;
$custom-dark: #000000;

JSON

{
  "hex": "#283c9e",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 158
  },
  "hsl": {
    "h": 229.831,
    "s": 59.596,
    "l": 38.824
  },
  "oklch": {
    "l": 0.40545,
    "c": 0.1603,
    "h": 269
  },
  "luminance": 0.06151
}

Semantic roles & 50–950 ramp

primary

#283C9E

secondary

#BFAF63

accent

#C845E3

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #283C9E

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

Preview Lab → · Contrast checker → · Palette generator →