#283B64#283B64

#283B64 is a dark, moderate blue. Relative luminance 0.045; OKLCH L 35.8% C 0.076 H 264.2°. Best body text is #FFFFFF at 11.05:1 contrast (WCAG AA passes).

Color values

HEX	#283B64
RGB	rgb(40, 59, 100)
HSL	hsl(221, 43%, 27%)
HSV	hsv(221, 60%, 39%)
CMYK	cmyk(60%, 41%, 0%, 60.8%)
CIE-LAB	lab(25.26, 6.19, -26.52)
CIE-LCH	lch(25.26, 27.23, 283.15°)
OKLab	oklab(35.77% -0.0077 -0.0752)
OKLCH	oklch(35.77% 0.076 264.2)
XYZ	xyz(4.7385, 4.4988, 12.6728)
Luminance	0.0450 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B64 #645128

analogous

#285964 #283B64 #332864

triadic

#283B64 #64283B #3B6428

tetradic

#283B64 #642859 #645128 #286433

square

#283B64 #642859 #645128 #286433

split-complementary

#283B64 #643328 #596428

monochromatic

#090D16 #172138 #283B64 #395590 #4E70B8

Accessibility & contrast

On white

11.05

#283B64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#283B64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B64

11.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B64	#FFFFFF	#000000	##FFFFFF
##283B64	1.00	11.05	1.90	11.05
#FFFFFF	11.05	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A3F66

Deuteranopia (green-blind)

#223963

Tritanopia (blue-blind)

#02444A

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #283b64;
/* rgb */ color: rgb(40, 59, 100);
/* oklch */ color: oklch(35.8% 0.076 264.2);

Tailwind

colors: {
  custom: {
    50: '#677090',
    500: '#283b64',
    950: '#000000',
  },
}

SCSS

$custom: #283b64;
$custom-light: #677090;
$custom-dark: #000000;

JSON

{
  "hex": "#283b64",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 100
  },
  "hsl": {
    "h": 221,
    "s": 42.857,
    "l": 27.451
  },
  "oklch": {
    "l": 0.35769,
    "c": 0.07555,
    "h": 264.2
  },
  "luminance": 0.04499
}

Semantic roles & 50–950 ramp

primary

#283B64

secondary

#978151

accent

#AB55D3

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06070C

muted

#7A7A7D

Preview Lab

Preview with #283B64

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

Preview Lab → · Contrast checker → · Palette generator →