#283A6B#283A6B

#283A6B is a dark, moderate blue. Relative luminance 0.045; OKLCH L 36.0% C 0.088 H 266.8°. Best body text is #FFFFFF at 11.01:1 contrast (WCAG AA passes).

Color values

HEX	#283A6B
RGB	rgb(40, 58, 107)
HSL	hsl(224, 46%, 29%)
HSV	hsv(224, 63%, 42%)
CMYK	cmyk(62.6%, 45.8%, 0%, 58%)
CIE-LAB	lab(25.38, 9.51, -30.83)
CIE-LCH	lch(25.38, 32.27, 287.14°)
OKLab	oklab(36% -0.0049 -0.0878)
OKLCH	oklch(36% 0.088 266.8)
XYZ	xyz(5.0411, 4.5383, 14.5174)
Luminance	0.0454 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A6B #6B5928

analogous

#285C6B #283A6B #38286B

triadic

#283A6B #6B283A #3A6B28

tetradic

#283A6B #6B285C #6B5928 #286B38

square

#283A6B #6B285C #6B5928 #286B38

split-complementary

#283A6B #6B3828 #5C6B28

monochromatic

#080C16 #17223E #283A6B #395298 #506DBE

Accessibility & contrast

On white

11.01

#283A6B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#283A6B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A6B

11.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A6B	#FFFFFF	#000000	##FFFFFF
##283A6B	1.00	11.01	1.91	11.01
#FFFFFF	11.01	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#243F6D

Deuteranopia (green-blind)

#1B396A

Tritanopia (blue-blind)

#00454D

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #283a6b;
/* rgb */ color: rgb(40, 58, 107);
/* oklch */ color: oklch(36.0% 0.088 266.8);

Tailwind

colors: {
  custom: {
    50: '#696f96',
    500: '#283a6b',
    950: '#000000',
  },
}

SCSS

$custom: #283a6b;
$custom-light: #696f96;
$custom-dark: #000000;

JSON

{
  "hex": "#283a6b",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 107
  },
  "hsl": {
    "h": 223.881,
    "s": 45.578,
    "l": 28.824
  },
  "oklch": {
    "l": 0.36002,
    "c": 0.08796,
    "h": 266.8
  },
  "luminance": 0.04539
}

Semantic roles & 50–950 ramp

primary

#283A6B

secondary

#9D8951

accent

#B253D5

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070D

muted

#7A7A7E

Preview Lab

Preview with #283A6B

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

Preview Lab → · Contrast checker → · Palette generator →