#283FA0#283FA0

#283FA0 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.3% C 0.159 H 268.3°. Best body text is #FFFFFF at 9.10:1 contrast (WCAG AA passes).

Color values

HEX	#283FA0
RGB	rgb(40, 63, 160)
HSL	hsl(229, 60%, 39%)
HSV	hsv(229, 75%, 63%)
CMYK	cmyk(75%, 60.6%, 0%, 37.3%)
CIE-LAB	lab(30.74, 26.38, -55.15)
CIE-LCH	lch(30.74, 61.13, 295.56°)
OKLab	oklab(41.31% -0.0048 -0.1592)
OKLCH	oklch(41.31% 0.159 268.3)
XYZ	xyz(8.9955, 6.5432, 34.0398)
Luminance	0.0654 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283FA0 #A08928

analogous

#287BA0 #283FA0 #4D28A0

triadic

#283FA0 #A0283F #3FA028

tetradic

#283FA0 #A0287B #A08928 #28A04D

square

#283FA0 #A0287B #A08928 #28A04D

split-complementary

#283FA0 #A04D28 #7BA028

monochromatic

#10183E #1C2C6F #283FA0 #3855CD #697ED9

Accessibility & contrast

On white

9.10

#283FA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#283FA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283FA0

9.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283FA0	#FFFFFF	#000000	##FFFFFF
##283FA0	1.00	9.10	2.31	9.10
#FFFFFF	9.10	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA3

Deuteranopia (green-blind)

#00439E

Tritanopia (blue-blind)

#005869

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #283fa0;
/* rgb */ color: rgb(40, 63, 160);
/* oklch */ color: oklch(41.3% 0.159 268.3);

Tailwind

colors: {
  custom: {
    50: '#7473bd',
    500: '#283fa0',
    950: '#000000',
  },
}

SCSS

$custom: #283fa0;
$custom-light: #7473bd;
$custom-dark: #000000;

JSON

{
  "hex": "#283fa0",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 160
  },
  "hsl": {
    "h": 228.5,
    "s": 60,
    "l": 39.216
  },
  "oklch": {
    "l": 0.41306,
    "c": 0.1593,
    "h": 268.3
  },
  "luminance": 0.06544
}

Semantic roles & 50–950 ramp

primary

#283FA0

secondary

#C0AE64

accent

#C545E3

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #283FA0

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

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