#283A7D#283A7D

#283A7D is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.3% C 0.116 H 268.9°. Best body text is #FFFFFF at 10.54:1 contrast (WCAG AA passes).

Color values

HEX	#283A7D
RGB	rgb(40, 58, 125)
HSL	hsl(227, 52%, 32%)
HSV	hsv(227, 68%, 49%)
CMYK	cmyk(68%, 53.6%, 0%, 51%)
CIE-LAB	lab(26.61, 16.38, -40.28)
CIE-LCH	lch(26.61, 43.49, 292.13°)
OKLab	oklab(37.34% -0.0023 -0.1156)
OKLCH	oklch(37.34% 0.116 268.9)
XYZ	xyz(6.0885, 4.9573, 20.0341)
Luminance	0.0496 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A7D #7D6B28

analogous

#28657D #283A7D #41287D

triadic

#283A7D #7D283A #3A7D28

tetradic

#283A7D #7D2865 #7D6B28 #287D41

square

#283A7D #7D2865 #7D6B28 #287D41

split-complementary

#283A7D #7D4128 #657D28

monochromatic

#0A0F20 #19244F #283A7D #3750AB #566FC9

Accessibility & contrast

On white

10.54

#283A7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#283A7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A7D

10.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A7D	#FFFFFF	#000000	##FFFFFF
##283A7D	1.00	10.54	1.99	10.54
#FFFFFF	10.54	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#11437F

Deuteranopia (green-blind)

#003B7C

Tritanopia (blue-blind)

#004A55

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283a7d;
/* rgb */ color: rgb(40, 58, 125);
/* oklch */ color: oklch(37.3% 0.116 268.9);

Tailwind

colors: {
  custom: {
    50: '#6c6fa3',
    500: '#283a7d',
    950: '#000000',
  },
}

SCSS

$custom: #283a7d;
$custom-light: #6c6fa3;
$custom-dark: #000000;

JSON

{
  "hex": "#283a7d",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 125
  },
  "hsl": {
    "h": 227.294,
    "s": 51.515,
    "l": 32.353
  },
  "oklch": {
    "l": 0.37342,
    "c": 0.11562,
    "h": 268.9
  },
  "luminance": 0.04958
}

Semantic roles & 50–950 ramp

primary

#283A7D

secondary

#AE9B53

accent

#BD4DDB

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #283A7D

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

Preview Lab → · Contrast checker → · Palette generator →