#283F6C#283F6C

#283F6C is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.3% C 0.083 H 262.6°. Best body text is #FFFFFF at 10.41:1 contrast (WCAG AA passes).

Color values

HEX	#283F6C
RGB	rgb(40, 63, 108)
HSL	hsl(220, 46%, 29%)
HSV	hsv(220, 63%, 42%)
CMYK	cmyk(63%, 41.7%, 0%, 57.6%)
CIE-LAB	lab(26.99, 6.44, -28.91)
CIE-LCH	lch(26.99, 29.62, 282.56°)
OKLab	oklab(37.26% -0.0107 -0.0821)
OKLCH	oklch(37.26% 0.083 262.6)
XYZ	xyz(5.3584, 5.0884, 14.8842)
Luminance	0.0509 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F6C #6C5528

analogous

#28616C #283F6C #33286C

triadic

#283F6C #6C283F #3F6C28

tetradic

#283F6C #6C2861 #6C5528 #286C33

square

#283F6C #6C2861 #6C5528 #286C33

split-complementary

#283F6C #6C3328 #616C28

monochromatic

#080D16 #17253F #283F6C #395999 #5075BE

Accessibility & contrast

On white

10.41

#283F6C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#283F6C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F6C

10.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F6C	#FFFFFF	#000000	##FFFFFF
##283F6C	1.00	10.41	2.02	10.41
#FFFFFF	10.41	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C436E

Deuteranopia (green-blind)

#223D6B

Tritanopia (blue-blind)

#004950

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283f6c;
/* rgb */ color: rgb(40, 63, 108);
/* oklch */ color: oklch(37.3% 0.083 262.6);

Tailwind

colors: {
  custom: {
    50: '#697396',
    500: '#283f6c',
    950: '#000000',
  },
}

SCSS

$custom: #283f6c;
$custom-light: #697396;
$custom-dark: #000000;

JSON

{
  "hex": "#283f6c",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 108
  },
  "hsl": {
    "h": 219.706,
    "s": 45.946,
    "l": 29.02
  },
  "oklch": {
    "l": 0.37262,
    "c": 0.08282,
    "h": 262.6
  },
  "luminance": 0.05089
}

Semantic roles & 50–950 ramp

primary

#283F6C

secondary

#9E8451

accent

#A952D6

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07080D

muted

#7A7B7E

Preview Lab

Preview with #283F6C

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

Preview Lab → · Contrast checker → · Palette generator →