#283B4E#283B4E

#283B4E is a dark, muted cyan. Relative luminance 0.041; OKLCH L 34.5% C 0.042 H 249.1°. Best body text is #FFFFFF at 11.50:1 contrast (WCAG AA passes).

Color values

HEX	#283B4E
RGB	rgb(40, 59, 78)
HSL	hsl(210, 32%, 23%)
HSV	hsv(210, 49%, 31%)
CMYK	cmyk(48.7%, 24.4%, 0%, 69.4%)
CIE-LAB	lab(24.09, -1.64, -13.94)
CIE-LCH	lch(24.09, 14.04, 263.29°)
OKLab	oklab(34.48% -0.0148 -0.0388)
OKLCH	oklch(34.48% 0.042 249.1)
XYZ	xyz(3.8137, 4.1289, 7.8022)
Luminance	0.0413 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B4E #4E3B28

analogous

#284E4E #283B4E #28284E

triadic

#283B4E #4E283B #3B4E28

tetradic

#283B4E #4E284E #4E3B28 #284E28

square

#283B4E #4E284E #4E3B28 #284E28

split-complementary

#283B4E #4E2828 #4E4E28

monochromatic

#0A0F14 #131C26 #283B4E #3D5A76 #51789F

Accessibility & contrast

On white

11.50

#283B4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#283B4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B4E

11.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B4E	#FFFFFF	#000000	##FFFFFF
##283B4E	1.00	11.50	1.83	11.50
#FFFFFF	11.50	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#333B4F

Deuteranopia (green-blind)

#2F384E

Tritanopia (blue-blind)

#193F41

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #283b4e;
/* rgb */ color: rgb(40, 59, 78);
/* oklch */ color: oklch(34.5% 0.042 249.1);

Tailwind

colors: {
  custom: {
    50: '#64707f',
    500: '#283b4e',
    950: '#000000',
  },
}

SCSS

$custom: #283b4e;
$custom-light: #64707f;
$custom-dark: #000000;

JSON

{
  "hex": "#283b4e",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 78
  },
  "hsl": {
    "h": 210,
    "s": 32.203,
    "l": 23.137
  },
  "oklch": {
    "l": 0.3448,
    "c": 0.0415,
    "h": 249.1
  },
  "luminance": 0.04129
}

Semantic roles & 50–950 ramp

primary

#283B4E

secondary

#816951

accent

#945FC8

background

#F6F6F7

surface

#EBECEE

border

#C6C7C9

text

#05070A

muted

#7A7A7C

Preview Lab

Preview with #283B4E

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

Preview Lab → · Contrast checker → · Palette generator →