#283D7E#283D7E

#283D7E is a dark, moderate blue. Relative luminance 0.053; OKLCH L 38.1% C 0.113 H 267.4°. Best body text is #FFFFFF at 10.20:1 contrast (WCAG AA passes).

Color values

HEX	#283D7E
RGB	rgb(40, 61, 126)
HSL	hsl(225, 52%, 33%)
HSV	hsv(225, 68%, 49%)
CMYK	cmyk(68.3%, 51.6%, 0%, 50.6%)
CIE-LAB	lab(27.56, 14.69, -39.39)
CIE-LCH	lch(27.56, 42.04, 290.46°)
OKLab	oklab(38.08% -0.0052 -0.1129)
OKLCH	oklch(38.08% 0.113 267.4)
XYZ	xyz(6.3084, 5.2944, 20.4241)
Luminance	0.0529 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D7E #7E6928

analogous

#28687E #283D7E #3E287E

triadic

#283D7E #7E283D #3D7E28

tetradic

#283D7E #7E2868 #7E6928 #287E3E

square

#283D7E #7E2868 #7E6928 #287E3E

split-complementary

#283D7E #7E3E28 #687E28

monochromatic

#0B1021 #192750 #283D7E #3753AC #5773CA

Accessibility & contrast

On white

10.20

#283D7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#283D7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D7E

10.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D7E	#FFFFFF	#000000	##FFFFFF
##283D7E	1.00	10.20	2.06	10.20
#FFFFFF	10.20	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#194580

Deuteranopia (green-blind)

#013D7D

Tritanopia (blue-blind)

#004C57

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283d7e;
/* rgb */ color: rgb(40, 61, 126);
/* oklch */ color: oklch(38.1% 0.113 267.4);

Tailwind

colors: {
  custom: {
    50: '#6c72a4',
    500: '#283d7e',
    950: '#000000',
  },
}

SCSS

$custom: #283d7e;
$custom-light: #6c72a4;
$custom-dark: #000000;

JSON

{
  "hex": "#283d7e",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 126
  },
  "hsl": {
    "h": 225.349,
    "s": 51.807,
    "l": 32.549
  },
  "oklch": {
    "l": 0.38081,
    "c": 0.11304,
    "h": 267.4
  },
  "luminance": 0.05295
}

Semantic roles & 50–950 ramp

primary

#283D7E

secondary

#AF9853

accent

#B84DDB

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #283D7E

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

Preview Lab → · Contrast checker → · Palette generator →