#283B65#283B65

#283B65 is a dark, moderate blue. Relative luminance 0.045; OKLCH L 35.8% C 0.077 H 264.5°. Best body text is #FFFFFF at 11.03:1 contrast (WCAG AA passes).

Color values

HEX	#283B65
RGB	rgb(40, 59, 101)
HSL	hsl(221, 43%, 28%)
HSV	hsv(221, 60%, 40%)
CMYK	cmyk(60.4%, 41.6%, 0%, 60.4%)
CIE-LAB	lab(25.32, 6.57, -27.07)
CIE-LCH	lch(25.32, 27.85, 283.63°)
OKLab	oklab(35.84% -0.0074 -0.0768)
OKLCH	oklch(35.84% 0.077 264.5)
XYZ	xyz(4.7872, 4.5183, 12.9292)
Luminance	0.0452 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B65 #655228

analogous

#285A65 #283B65 #332865

triadic

#283B65 #65283B #3B6528

tetradic

#283B65 #65285A #655228 #286533

square

#283B65 #65285A #655228 #286533

split-complementary

#283B65 #653328 #5A6528

monochromatic

#090D16 #172139 #283B65 #395591 #4E70B9

Accessibility & contrast

On white

11.03

#283B65 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#283B65 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B65

11.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B65	#FFFFFF	#000000	##FFFFFF
##283B65	1.00	11.03	1.90	11.03
#FFFFFF	11.03	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#293F67

Deuteranopia (green-blind)

#223964

Tritanopia (blue-blind)

#00444B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #283b65;
/* rgb */ color: rgb(40, 59, 101);
/* oklch */ color: oklch(35.8% 0.077 264.5);

Tailwind

colors: {
  custom: {
    50: '#677091',
    500: '#283b65',
    950: '#000000',
  },
}

SCSS

$custom: #283b65;
$custom-light: #677091;
$custom-dark: #000000;

JSON

{
  "hex": "#283b65",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 101
  },
  "hsl": {
    "h": 221.311,
    "s": 43.262,
    "l": 27.647
  },
  "oklch": {
    "l": 0.35835,
    "c": 0.07714,
    "h": 264.5
  },
  "luminance": 0.04519
}

Semantic roles & 50–950 ramp

primary

#283B65

secondary

#988251

accent

#AC55D3

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06070D

muted

#7A7A7D

Preview Lab

Preview with #283B65

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

Preview Lab → · Contrast checker → · Palette generator →