#283A7F#283A7F

#283A7F is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.5% C 0.119 H 269.0°. Best body text is #FFFFFF at 10.49:1 contrast (WCAG AA passes).

Color values

HEX	#283A7F
RGB	rgb(40, 58, 127)
HSL	hsl(228, 52%, 33%)
HSV	hsv(228, 69%, 50%)
CMYK	cmyk(68.5%, 54.3%, 0%, 50.2%)
CIE-LAB	lab(26.76, 17.15, -41.30)
CIE-LCH	lch(26.76, 44.72, 292.55°)
OKLab	oklab(37.5% -0.0021 -0.1186)
OKLCH	oklch(37.5% 0.119 269)
XYZ	xyz(6.2176, 5.0090, 20.7137)
Luminance	0.0501 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A7F #7F6D28

analogous

#28667F #283A7F #41287F

triadic

#283A7F #7F283A #3A7F28

tetradic

#283A7F #7F2866 #7F6D28 #287F41

square

#283A7F #7F2866 #7F6D28 #287F41

split-complementary

#283A7F #7F4128 #667F28

monochromatic

#0B0F22 #192550 #283A7F #374FAE #576FCA

Accessibility & contrast

On white

10.49

#283A7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#283A7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A7F

10.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A7F	#FFFFFF	#000000	##FFFFFF
##283A7F	1.00	10.49	2.00	10.49
#FFFFFF	10.49	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E4381

Deuteranopia (green-blind)

#003C7E

Tritanopia (blue-blind)

#004A56

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283a7f;
/* rgb */ color: rgb(40, 58, 127);
/* oklch */ color: oklch(37.5% 0.119 269.0);

Tailwind

colors: {
  custom: {
    50: '#6d6fa5',
    500: '#283a7f',
    950: '#000000',
  },
}

SCSS

$custom: #283a7f;
$custom-light: #6d6fa5;
$custom-dark: #000000;

JSON

{
  "hex": "#283a7f",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 127
  },
  "hsl": {
    "h": 227.586,
    "s": 52.096,
    "l": 32.745
  },
  "oklch": {
    "l": 0.375,
    "c": 0.11862,
    "h": 269
  },
  "luminance": 0.0501
}

Semantic roles & 50–950 ramp

primary

#283A7F

secondary

#AF9C54

accent

#BE4CDC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08070F

muted

#7A7A7F

Preview Lab

Preview with #283A7F

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

Preview Lab → · Contrast checker → · Palette generator →