#283F6B#283F6B

#283F6B is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.2% C 0.081 H 262.3°. Best body text is #FFFFFF at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#283F6B
RGB	rgb(40, 63, 107)
HSL	hsl(219, 46%, 29%)
HSV	hsv(219, 63%, 42%)
CMYK	cmyk(62.6%, 41.1%, 0%, 58%)
CIE-LAB	lab(26.93, 6.06, -28.37)
CIE-LCH	lch(26.93, 29.01, 282.07°)
OKLab	oklab(37.2% -0.0109 -0.0805)
OKLCH	oklch(37.2% 0.081 262.3)
XYZ	xyz(5.3055, 5.0672, 14.6055)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F6B #6B5428

analogous

#28616B #283F6B #33286B

triadic

#283F6B #6B283F #3F6B28

tetradic

#283F6B #6B2861 #6B5428 #286B33

square

#283F6B #6B2861 #6B5428 #286B33

split-complementary

#283F6B #6B3328 #616B28

monochromatic

#080D16 #17253E #283F6B #395998 #5076BE

Accessibility & contrast

On white

10.43

#283F6B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#283F6B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F6B

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F6B	#FFFFFF	#000000	##FFFFFF
##283F6B	1.00	10.43	2.01	10.43
#FFFFFF	10.43	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C436D

Deuteranopia (green-blind)

#233D6A

Tritanopia (blue-blind)

#00494F

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283f6b;
/* rgb */ color: rgb(40, 63, 107);
/* oklch */ color: oklch(37.2% 0.081 262.3);

Tailwind

colors: {
  custom: {
    50: '#687395',
    500: '#283f6b',
    950: '#000000',
  },
}

SCSS

$custom: #283f6b;
$custom-light: #687395;
$custom-dark: #000000;

JSON

{
  "hex": "#283f6b",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 107
  },
  "hsl": {
    "h": 219.403,
    "s": 45.578,
    "l": 28.824
  },
  "oklch": {
    "l": 0.37197,
    "c": 0.08128,
    "h": 262.3
  },
  "luminance": 0.05068
}

Semantic roles & 50–950 ramp

primary

#283F6B

secondary

#9D8351

accent

#A853D5

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07080D

muted

#7A7B7E

Preview Lab

Preview with #283F6B

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

Preview Lab → · Contrast checker → · Palette generator →