#283C81#283C81

#283C81 is a dark, moderate blue. Relative luminance 0.053; OKLCH L 38.1% C 0.119 H 268.1°. Best body text is #FFFFFF at 10.23:1 contrast (WCAG AA passes).

Color values

HEX	#283C81
RGB	rgb(40, 60, 129)
HSL	hsl(227, 53%, 33%)
HSV	hsv(227, 69%, 51%)
CMYK	cmyk(69%, 53.5%, 0%, 49.4%)
CIE-LAB	lab(27.48, 16.54, -41.39)
CIE-LCH	lch(27.48, 44.57, 291.78°)
OKLab	oklab(38.09% -0.0038 -0.1188)
OKLCH	oklch(38.09% 0.119 268.1)
XYZ	xyz(6.4520, 5.2672, 21.4413)
Luminance	0.0527 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C81 #816D28

analogous

#286881 #283C81 #402881

triadic

#283C81 #81283C #3C8128

tetradic

#283C81 #812868 #816D28 #288140

square

#283C81 #812868 #816D28 #288140

split-complementary

#283C81 #814028 #688128

monochromatic

#0B1124 #1A2652 #283C81 #3652B0 #5872CB

Accessibility & contrast

On white

10.23

#283C81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#283C81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C81

10.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C81	#FFFFFF	#000000	##FFFFFF
##283C81	1.00	10.23	2.05	10.23
#FFFFFF	10.23	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#114583

Deuteranopia (green-blind)

#003D80

Tritanopia (blue-blind)

#004C58

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283c81;
/* rgb */ color: rgb(40, 60, 129);
/* oklch */ color: oklch(38.1% 0.119 268.1);

Tailwind

colors: {
  custom: {
    50: '#6d71a6',
    500: '#283c81',
    950: '#000000',
  },
}

SCSS

$custom: #283c81;
$custom-light: #6d71a6;
$custom-dark: #000000;

JSON

{
  "hex": "#283c81",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 129
  },
  "hsl": {
    "h": 226.517,
    "s": 52.663,
    "l": 33.137
  },
  "oklch": {
    "l": 0.38093,
    "c": 0.11888,
    "h": 268.1
  },
  "luminance": 0.05268
}

Semantic roles & 50–950 ramp

primary

#283C81

secondary

#B09C54

accent

#BC4CDC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08070F

muted

#7A7A7F

Preview Lab

Preview with #283C81

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

Preview Lab → · Contrast checker → · Palette generator →