#283F98#283F98

#283F98 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.6% C 0.148 H 268.1°. Best body text is #FFFFFF at 9.31:1 contrast (WCAG AA passes).

Color values

HEX	#283F98
RGB	rgb(40, 63, 152)
HSL	hsl(228, 58%, 38%)
HSV	hsv(228, 74%, 60%)
CMYK	cmyk(73.7%, 58.6%, 0%, 40.4%)
CIE-LAB	lab(30.09, 23.33, -51.36)
CIE-LCH	lch(30.09, 56.41, 294.43°)
OKLab	oklab(40.61% -0.005 -0.1481)
OKLCH	oklch(40.61% 0.148 268.1)
XYZ	xyz(8.3181, 6.2723, 30.4720)
Luminance	0.0627 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F98 #988128

analogous

#287798 #283F98 #492898

triadic

#283F98 #98283F #3F9828

tetradic

#283F98 #982877 #988128 #289849

square

#283F98 #982877 #988128 #289849

split-complementary

#283F98 #984928 #779828

monochromatic

#0F1737 #1B2B68 #283F98 #3553C8 #647CD6

Accessibility & contrast

On white

9.31

#283F98 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#283F98 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F98

9.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F98	#FFFFFF	#000000	##FFFFFF
##283F98	1.00	9.31	2.25	9.31
#FFFFFF	9.31	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9B

Deuteranopia (green-blind)

#004296

Tritanopia (blue-blind)

#005565

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #283f98;
/* rgb */ color: rgb(40, 63, 152);
/* oklch */ color: oklch(40.6% 0.148 268.1);

Tailwind

colors: {
  custom: {
    50: '#7273b7',
    500: '#283f98',
    950: '#000000',
  },
}

SCSS

$custom: #283f98;
$custom-light: #7273b7;
$custom-dark: #000000;

JSON

{
  "hex": "#283f98",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 152
  },
  "hsl": {
    "h": 227.679,
    "s": 58.333,
    "l": 37.647
  },
  "oklch": {
    "l": 0.40613,
    "c": 0.14818,
    "h": 268.1
  },
  "luminance": 0.06273
}

Semantic roles & 50–950 ramp

primary

#283F98

secondary

#BCA960

accent

#C246E2

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090811

muted

#7B7B80

Preview Lab

Preview with #283F98

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

Preview Lab → · Contrast checker → · Palette generator →