#283A64#283A64

#283A64 is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.5% C 0.077 H 265.2°. Best body text is #FFFFFF at 11.17:1 contrast (WCAG AA passes).

Color values

HEX	#283A64
RGB	rgb(40, 58, 100)
HSL	hsl(222, 43%, 27%)
HSV	hsv(222, 60%, 39%)
CMYK	cmyk(60%, 42%, 0%, 60.8%)
CIE-LAB	lab(24.94, 6.88, -27.01)
CIE-LCH	lch(24.94, 27.88, 284.30°)
OKLab	oklab(35.53% -0.0064 -0.0766)
OKLCH	oklch(35.53% 0.077 265.2)
XYZ	xyz(4.6876, 4.3970, 12.6558)
Luminance	0.0440 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A64 #645228

analogous

#285864 #283A64 #342864

triadic

#283A64 #64283A #3A6428

tetradic

#283A64 #642858 #645228 #286434

square

#283A64 #642858 #645228 #286434

split-complementary

#283A64 #643428 #586428

monochromatic

#090D16 #172138 #283A64 #395390 #4E6EB8

Accessibility & contrast

On white

11.17

#283A64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#283A64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A64

11.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A64	#FFFFFF	#000000	##FFFFFF
##283A64	1.00	11.17	1.88	11.17
#FFFFFF	11.17	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#283E66

Deuteranopia (green-blind)

#213963

Tritanopia (blue-blind)

#02434A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #283a64;
/* rgb */ color: rgb(40, 58, 100);
/* oklch */ color: oklch(35.5% 0.077 265.2);

Tailwind

colors: {
  custom: {
    50: '#676f90',
    500: '#283a64',
    950: '#000000',
  },
}

SCSS

$custom: #283a64;
$custom-light: #676f90;
$custom-dark: #000000;

JSON

{
  "hex": "#283a64",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 100
  },
  "hsl": {
    "h": 222,
    "s": 42.857,
    "l": 27.451
  },
  "oklch": {
    "l": 0.35527,
    "c": 0.0769,
    "h": 265.2
  },
  "luminance": 0.04397
}

Semantic roles & 50–950 ramp

primary

#283A64

secondary

#978251

accent

#AD55D3

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06070C

muted

#7A7A7D

Preview Lab

Preview with #283A64

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

Preview Lab → · Contrast checker → · Palette generator →