#283A5D#283A5D

#283A5D is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.1% C 0.066 H 262.8°. Best body text is #FFFFFF at 11.33:1 contrast (WCAG AA passes).

Color values

HEX	#283A5D
RGB	rgb(40, 58, 93)
HSL	hsl(220, 40%, 26%)
HSV	hsv(220, 57%, 36%)
CMYK	cmyk(57%, 37.6%, 0%, 63.5%)
CIE-LAB	lab(24.54, 4.31, -23.11)
CIE-LCH	lch(24.54, 23.51, 280.56°)
OKLab	oklab(35.08% -0.0083 -0.0652)
OKLCH	oklch(35.08% 0.066 262.8)
XYZ	xyz(4.3632, 4.2672, 10.9475)
Luminance	0.0427 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A5D #5D4B28

analogous

#28545D #283A5D #30285D

triadic

#283A5D #5D283A #3A5D28

tetradic

#283A5D #5D2854 #5D4B28 #285D30

square

#283A5D #5D2854 #5D4B28 #285D30

split-complementary

#283A5D #5D3028 #545D28

monochromatic

#090D15 #161F32 #283A5D #3A5588 #4D6FB2

Accessibility & contrast

On white

11.33

#283A5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#283A5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A5D

11.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A5D	#FFFFFF	#000000	##FFFFFF
##283A5D	1.00	11.33	1.85	11.33
#FFFFFF	11.33	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C3D5E

Deuteranopia (green-blind)

#26385C

Tritanopia (blue-blind)

#0C4247

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #283a5d;
/* rgb */ color: rgb(40, 58, 93);
/* oklch */ color: oklch(35.1% 0.066 262.8);

Tailwind

colors: {
  custom: {
    50: '#666f8b',
    500: '#283a5d',
    950: '#000000',
  },
}

SCSS

$custom: #283a5d;
$custom-light: #666f8b;
$custom-dark: #000000;

JSON

{
  "hex": "#283a5d",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 93
  },
  "hsl": {
    "h": 219.623,
    "s": 39.85,
    "l": 26.078
  },
  "oklch": {
    "l": 0.35079,
    "c": 0.06575,
    "h": 262.8
  },
  "luminance": 0.04268
}

Semantic roles & 50–950 ramp

primary

#283A5D

secondary

#907A51

accent

#A758D0

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06070C

muted

#7A7A7D

Preview Lab

Preview with #283A5D

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

Preview Lab → · Contrast checker → · Palette generator →