#283B9C#283B9C

#283B9C is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.2% C 0.159 H 269.3°. Best body text is #FFFFFF at 9.56:1 contrast (WCAG AA passes).

Color values

HEX	#283B9C
RGB	rgb(40, 59, 156)
HSL	hsl(230, 59%, 38%)
HSV	hsv(230, 74%, 61%)
CMYK	cmyk(74.4%, 62.2%, 0%, 38.8%)
CIE-LAB	lab(29.36, 27.54, -54.98)
CIE-LCH	lch(29.36, 61.49, 296.60°)
OKLab	oklab(40.17% -0.0019 -0.1588)
OKLCH	oklch(40.17% 0.159 269.3)
XYZ	xyz(8.4377, 5.9785, 32.1553)
Luminance	0.0598 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B9C #9C8928

analogous

#28759C #283B9C #4F289C

triadic

#283B9C #9C283B #3B9C28

tetradic

#283B9C #9C2875 #9C8928 #289C4F

square

#283B9C #9C2875 #9C8928 #289C4F

split-complementary

#283B9C #9C4F28 #759C28

monochromatic

#0F163B #1C296B #283B9C #364ECB #6779D8

Accessibility & contrast

On white

9.56

#283B9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#283B9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B9C

9.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B9C	#FFFFFF	#000000	##FFFFFF
##283B9C	1.00	9.56	2.20	9.56
#FFFFFF	9.56	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9F

Deuteranopia (green-blind)

#00409A

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #283b9c;
/* rgb */ color: rgb(40, 59, 156);
/* oklch */ color: oklch(40.2% 0.159 269.3);

Tailwind

colors: {
  custom: {
    50: '#7370ba',
    500: '#283b9c',
    950: '#000000',
  },
}

SCSS

$custom: #283b9c;
$custom-light: #7370ba;
$custom-dark: #000000;

JSON

{
  "hex": "#283b9c",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 156
  },
  "hsl": {
    "h": 230.172,
    "s": 59.184,
    "l": 38.431
  },
  "oklch": {
    "l": 0.40173,
    "c": 0.15881,
    "h": 269.3
  },
  "luminance": 0.05979
}

Semantic roles & 50–950 ramp

primary

#283B9C

secondary

#BEAF62

accent

#C945E2

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #283B9C

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

Preview Lab → · Contrast checker → · Palette generator →