#283A63#283A63

#283A63 is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.5% C 0.075 H 264.9°. Best body text is #FFFFFF at 11.20:1 contrast (WCAG AA passes).

Color values

HEX	#283A63
RGB	rgb(40, 58, 99)
HSL	hsl(222, 42%, 27%)
HSV	hsv(222, 60%, 39%)
CMYK	cmyk(59.6%, 41.4%, 0%, 61.2%)
CIE-LAB	lab(24.88, 6.51, -26.46)
CIE-LCH	lch(24.88, 27.25, 283.83°)
OKLab	oklab(35.46% -0.0067 -0.075)
OKLCH	oklch(35.46% 0.075 264.9)
XYZ	xyz(4.6395, 4.3777, 12.4025)
Luminance	0.0438 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A63 #635128

analogous

#285863 #283A63 #342863

triadic

#283A63 #63283A #3A6328

tetradic

#283A63 #632858 #635128 #286334

square

#283A63 #632858 #635128 #286334

split-complementary

#283A63 #633428 #586328

monochromatic

#090D16 #162037 #283A63 #3A548F #4E6EB7

Accessibility & contrast

On white

11.20

#283A63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#283A63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A63

11.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A63	#FFFFFF	#000000	##FFFFFF
##283A63	1.00	11.20	1.88	11.20
#FFFFFF	11.20	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#293E65

Deuteranopia (green-blind)

#223962

Tritanopia (blue-blind)

#044349

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #283a63;
/* rgb */ color: rgb(40, 58, 99);
/* oklch */ color: oklch(35.5% 0.075 264.9);

Tailwind

colors: {
  custom: {
    50: '#676f8f',
    500: '#283a63',
    950: '#000000',
  },
}

SCSS

$custom: #283a63;
$custom-light: #676f8f;
$custom-dark: #000000;

JSON

{
  "hex": "#283a63",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 99
  },
  "hsl": {
    "h": 221.695,
    "s": 42.446,
    "l": 27.255
  },
  "oklch": {
    "l": 0.35461,
    "c": 0.07531,
    "h": 264.9
  },
  "luminance": 0.04378
}

Semantic roles & 50–950 ramp

primary

#283A63

secondary

#968151

accent

#AC56D2

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06070C

muted

#7A7A7D

Preview Lab

Preview with #283A63

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

Preview Lab → · Contrast checker → · Palette generator →