#283C9D#283C9D

#283C9D is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.5% C 0.159 H 269.0°. Best body text is #FFFFFF at 9.44:1 contrast (WCAG AA passes).

Color values

HEX	#283C9D
RGB	rgb(40, 60, 157)
HSL	hsl(230, 59%, 39%)
HSV	hsv(230, 75%, 62%)
CMYK	cmyk(74.5%, 61.8%, 0%, 38.4%)
CIE-LAB	lab(29.70, 27.25, -55.03)
CIE-LCH	lch(29.70, 61.40, 296.34°)
OKLab	oklab(40.46% -0.0027 -0.1589)
OKLCH	oklch(40.46% 0.159 269)
XYZ	xyz(8.5746, 6.1163, 32.6204)
Luminance	0.0612 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C9D #9D8928

analogous

#28769D #283C9D #4E289D

triadic

#283C9D #9D283C #3C9D28

tetradic

#283C9D #9D2876 #9D8928 #289D4E

square

#283C9D #9D2876 #9D8928 #289D4E

split-complementary

#283C9D #9D4E28 #769D28

monochromatic

#0F173B #1C296C #283C9D #3650CC #677AD8

Accessibility & contrast

On white

9.44

#283C9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#283C9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C9D

9.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C9D	#FFFFFF	#000000	##FFFFFF
##283C9D	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)

#004CA0

Deuteranopia (green-blind)

#00419B

Tritanopia (blue-blind)

#005566

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #283c9d;
/* rgb */ color: rgb(40, 60, 157);
/* oklch */ color: oklch(40.5% 0.159 269.0);

Tailwind

colors: {
  custom: {
    50: '#7471bb',
    500: '#283c9d',
    950: '#000000',
  },
}

SCSS

$custom: #283c9d;
$custom-light: #7471bb;
$custom-dark: #000000;

JSON

{
  "hex": "#283c9d",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 157
  },
  "hsl": {
    "h": 229.744,
    "s": 59.391,
    "l": 38.627
  },
  "oklch": {
    "l": 0.40456,
    "c": 0.15893,
    "h": 269
  },
  "luminance": 0.06117
}

Semantic roles & 50–950 ramp

primary

#283C9D

secondary

#BEAF62

accent

#C845E3

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #283C9D

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

Preview Lab → · Contrast checker → · Palette generator →