#283F7F#283F7F

#283F7F is a dark, moderate blue. Relative luminance 0.055; OKLCH L 38.6% C 0.112 H 266.4°. Best body text is #FFFFFF at 9.96:1 contrast (WCAG AA passes).

Color values

HEX	#283F7F
RGB	rgb(40, 63, 127)
HSL	hsl(224, 52%, 33%)
HSV	hsv(224, 69%, 50%)
CMYK	cmyk(68.5%, 50.4%, 0%, 50.2%)
CIE-LAB	lab(28.22, 13.70, -38.96)
CIE-LCH	lch(28.22, 41.29, 289.37°)
OKLab	oklab(38.6% -0.0071 -0.1116)
OKLCH	oklch(38.6% 0.112 266.4)
XYZ	xyz(6.4820, 5.5378, 20.8019)
Luminance	0.0554 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F7F #7F6828

analogous

#286A7F #283F7F #3C287F

triadic

#283F7F #7F283F #3F7F28

tetradic

#283F7F #7F286A #7F6828 #287F3C

square

#283F7F #7F286A #7F6828 #287F3C

split-complementary

#283F7F #7F3C28 #6A7F28

monochromatic

#0B1122 #192850 #283F7F #3756AE #5776CA

Accessibility & contrast

On white

9.96

#283F7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#283F7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F7F

9.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F7F	#FFFFFF	#000000	##FFFFFF
##283F7F	1.00	9.96	2.11	9.96
#FFFFFF	9.96	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D4781

Deuteranopia (green-blind)

#073F7E

Tritanopia (blue-blind)

#004E59

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #283f7f;
/* rgb */ color: rgb(40, 63, 127);
/* oklch */ color: oklch(38.6% 0.112 266.4);

Tailwind

colors: {
  custom: {
    50: '#6c73a4',
    500: '#283f7f',
    950: '#000000',
  },
}

SCSS

$custom: #283f7f;
$custom-light: #6c73a4;
$custom-dark: #000000;

JSON

{
  "hex": "#283f7f",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 127
  },
  "hsl": {
    "h": 224.138,
    "s": 52.096,
    "l": 32.745
  },
  "oklch": {
    "l": 0.38604,
    "c": 0.11184,
    "h": 266.4
  },
  "luminance": 0.05538
}

Semantic roles & 50–950 ramp

primary

#283F7F

secondary

#AF9754

accent

#B64CDC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08080F

muted

#7B7B7F

Preview Lab

Preview with #283F7F

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

Preview Lab → · Contrast checker → · Palette generator →