#283A4D#283A4D

#283A4D is a dark, muted cyan. Relative luminance 0.040; OKLCH L 34.2% C 0.041 H 250.4°. Best body text is #FFFFFF at 11.65:1 contrast (WCAG AA passes).

Color values

HEX	#283A4D
RGB	rgb(40, 58, 77)
HSL	hsl(211, 32%, 23%)
HSV	hsv(211, 48%, 30%)
CMYK	cmyk(48.1%, 24.7%, 0%, 69.8%)
CIE-LAB	lab(23.71, -1.31, -13.87)
CIE-LCH	lch(23.71, 13.93, 264.61°)
OKLab	oklab(34.17% -0.0137 -0.0385)
OKLCH	oklch(34.17% 0.041 250.4)
XYZ	xyz(3.7272, 4.0128, 7.5979)
Luminance	0.0401 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A4D #4D3B28

analogous

#284C4D #283A4D #28284D

triadic

#283A4D #4D283A #3A4D28

tetradic

#283A4D #4D284C #4D3B28 #284D28

square

#283A4D #4D284C #4D3B28 #284D28

split-complementary

#283A4D #4D2828 #4C4D28

monochromatic

#0A0F14 #131C25 #283A4D #3D5875 #52779E

Accessibility & contrast

On white

11.65

#283A4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#283A4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A4D

11.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A4D	#FFFFFF	#000000	##FFFFFF
##283A4D	1.00	11.65	1.80	11.65
#FFFFFF	11.65	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#333B4E

Deuteranopia (green-blind)

#2E374D

Tritanopia (blue-blind)

#1A3E40

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #283a4d;
/* rgb */ color: rgb(40, 58, 77);
/* oklch */ color: oklch(34.2% 0.041 250.4);

Tailwind

colors: {
  custom: {
    50: '#64707e',
    500: '#283a4d',
    950: '#000000',
  },
}

SCSS

$custom: #283a4d;
$custom-light: #64707e;
$custom-dark: #000000;

JSON

{
  "hex": "#283a4d",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 77
  },
  "hsl": {
    "h": 210.811,
    "s": 31.624,
    "l": 22.941
  },
  "oklch": {
    "l": 0.34166,
    "c": 0.04092,
    "h": 250.4
  },
  "luminance": 0.04013
}

Semantic roles & 50–950 ramp

primary

#283A4D

secondary

#806951

accent

#9560C8

background

#F6F6F7

surface

#EBECEE

border

#C6C7C9

text

#05070A

muted

#7A7A7C

Preview Lab

Preview with #283A4D

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

Preview Lab → · Contrast checker → · Palette generator →