#283F65#283F65

#283F65 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.8% C 0.072 H 260.0°. Best body text is #FFFFFF at 10.56:1 contrast (WCAG AA passes).

Color values

HEX	#283F65
RGB	rgb(40, 63, 101)
HSL	hsl(217, 43%, 28%)
HSV	hsv(217, 60%, 40%)
CMYK	cmyk(60.4%, 37.6%, 0%, 60.4%)
CIE-LAB	lab(26.58, 3.83, -25.07)
CIE-LCH	lch(26.58, 25.36, 278.68°)
OKLab	oklab(36.81% -0.0125 -0.0709)
OKLCH	oklch(36.81% 0.072 260)
XYZ	xyz(5.0007, 4.9453, 13.0004)
Luminance	0.0495 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F65 #654E28

analogous

#285D65 #283F65 #302865

triadic

#283F65 #65283F #3F6528

tetradic

#283F65 #65285D #654E28 #286530

square

#283F65 #65285D #654E28 #286530

split-complementary

#283F65 #653028 #5D6528

monochromatic

#090E16 #172439 #283F65 #395A91 #4E77B9

Accessibility & contrast

On white

10.56

#283F65 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#283F65 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F65

10.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F65	#FFFFFF	#000000	##FFFFFF
##283F65	1.00	10.56	1.99	10.56
#FFFFFF	10.56	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F4267

Deuteranopia (green-blind)

#283C64

Tritanopia (blue-blind)

#00474D

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283f65;
/* rgb */ color: rgb(40, 63, 101);
/* oklch */ color: oklch(36.8% 0.072 260.0);

Tailwind

colors: {
  custom: {
    50: '#677391',
    500: '#283f65',
    950: '#000000',
  },
}

SCSS

$custom: #283f65;
$custom-light: #677391;
$custom-dark: #000000;

JSON

{
  "hex": "#283f65",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 101
  },
  "hsl": {
    "h": 217.377,
    "s": 43.262,
    "l": 27.647
  },
  "oklch": {
    "l": 0.36814,
    "c": 0.072,
    "h": 260
  },
  "luminance": 0.04946
}

Semantic roles & 50–950 ramp

primary

#283F65

secondary

#987D51

accent

#A355D3

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06080C

muted

#7A7B7D

Preview Lab

Preview with #283F65

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

Preview Lab → · Contrast checker → · Palette generator →