#283A99#283A99

#283A99 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.7% C 0.156 H 269.6°. Best body text is #FFFFFF at 9.74:1 contrast (WCAG AA passes).

Color values

HEX	#283A99
RGB	rgb(40, 58, 153)
HSL	hsl(230, 59%, 38%)
HSV	hsv(230, 74%, 60%)
CMYK	cmyk(73.9%, 62.1%, 0%, 40%)
CIE-LAB	lab(28.84, 27.08, -54.00)
CIE-LCH	lch(28.84, 60.41, 296.63°)
OKLab	oklab(39.71% -0.0012 -0.1559)
OKLCH	oklch(39.71% 0.156 269.6)
XYZ	xyz(8.1359, 5.7763, 30.8170)
Luminance	0.0578 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A99 #998728

analogous

#287399 #283A99 #4E2899

triadic

#283A99 #99283A #3A9928

tetradic

#283A99 #992873 #998728 #28994E

square

#283A99 #992873 #998728 #28994E

split-complementary

#283A99 #994E28 #739928

monochromatic

#0F1538 #1B2868 #283A99 #354CCA #6577D7

Accessibility & contrast

On white

9.74

#283A99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#283A99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A99

9.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A99	#FFFFFF	#000000	##FFFFFF
##283A99	1.00	9.74	2.16	9.74
#FFFFFF	9.74	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00499C

Deuteranopia (green-blind)

#003F97

Tritanopia (blue-blind)

#005264

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #283a99;
/* rgb */ color: rgb(40, 58, 153);
/* oklch */ color: oklch(39.7% 0.156 269.6);

Tailwind

colors: {
  custom: {
    50: '#7370b8',
    500: '#283a99',
    950: '#000000',
  },
}

SCSS

$custom: #283a99;
$custom-light: #7370b8;
$custom-dark: #000000;

JSON

{
  "hex": "#283a99",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 153
  },
  "hsl": {
    "h": 230.442,
    "s": 58.549,
    "l": 37.843
  },
  "oklch": {
    "l": 0.3971,
    "c": 0.15593,
    "h": 269.6
  },
  "luminance": 0.05777
}

Semantic roles & 50–950 ramp

primary

#283A99

secondary

#BDAE60

accent

#C946E2

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #283A99

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

Preview Lab → · Contrast checker → · Palette generator →