#283B5F#283B5F

#283B5F is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.5% C 0.068 H 262.3°. Best body text is #FFFFFF at 11.16:1 contrast (WCAG AA passes).

Color values

HEX	#283B5F
RGB	rgb(40, 59, 95)
HSL	hsl(219, 41%, 26%)
HSV	hsv(219, 58%, 37%)
CMYK	cmyk(57.9%, 37.9%, 0%, 62.7%)
CIE-LAB	lab(24.97, 4.35, -23.73)
CIE-LCH	lch(24.97, 24.13, 280.39°)
OKLab	oklab(35.45% -0.009 -0.067)
OKLCH	oklch(35.45% 0.068 262.3)
XYZ	xyz(4.5039, 4.4049, 11.4372)
Luminance	0.0440 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B5F #5F4C28

analogous

#28575F #283B5F #31285F

triadic

#283B5F #5F283B #3B5F28

tetradic

#283B5F #5F2857 #5F4C28 #285F31

square

#283B5F #5F2857 #5F4C28 #285F31

split-complementary

#283B5F #5F3128 #575F28

monochromatic

#090D16 #162034 #283B5F #3A568A #4D71B4

Accessibility & contrast

On white

11.16

#283B5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#283B5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B5F

11.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B5F	#FFFFFF	#000000	##FFFFFF
##283B5F	1.00	11.16	1.88	11.16
#FFFFFF	11.16	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D3E60

Deuteranopia (green-blind)

#26395E

Tritanopia (blue-blind)

#094348

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #283b5f;
/* rgb */ color: rgb(40, 59, 95);
/* oklch */ color: oklch(35.5% 0.068 262.3);

Tailwind

colors: {
  custom: {
    50: '#66708c',
    500: '#283b5f',
    950: '#000000',
  },
}

SCSS

$custom: #283b5f;
$custom-light: #66708c;
$custom-dark: #000000;

JSON

{
  "hex": "#283b5f",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 95
  },
  "hsl": {
    "h": 219.273,
    "s": 40.741,
    "l": 26.471
  },
  "oklch": {
    "l": 0.35451,
    "c": 0.06764,
    "h": 262.3
  },
  "luminance": 0.04405
}

Semantic roles & 50–950 ramp

primary

#283B5F

secondary

#927B51

accent

#A757D1

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06070C

muted

#7A7A7D

Preview Lab

Preview with #283B5F

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

Preview Lab → · Contrast checker → · Palette generator →