#283C7A#283C7A

#283C7A is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.6% C 0.108 H 267.5°. Best body text is #FFFFFF at 10.41:1 contrast (WCAG AA passes).

Color values

HEX	#283C7A
RGB	rgb(40, 60, 122)
HSL	hsl(225, 51%, 32%)
HSV	hsv(225, 67%, 48%)
CMYK	cmyk(67.2%, 50.8%, 0%, 52.2%)
CIE-LAB	lab(26.98, 13.85, -37.80)
CIE-LCH	lch(26.98, 40.26, 290.12°)
OKLab	oklab(37.55% -0.0047 -0.1083)
OKLCH	oklch(37.55% 0.108 267.5)
XYZ	xyz(6.0026, 5.0874, 19.0742)
Luminance	0.0509 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C7A #7A6628

analogous

#28657A #283C7A #3D287A

triadic

#283C7A #7A283C #3C7A28

tetradic

#283C7A #7A2865 #7A6628 #287A3D

square

#283C7A #7A2865 #7A6628 #287A3D

split-complementary

#283C7A #7A3D28 #657A28

monochromatic

#0A0F1E #19254C #283C7A #3753A8 #5571C7

Accessibility & contrast

On white

10.41

#283C7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#283C7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C7A

10.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C7A	#FFFFFF	#000000	##FFFFFF
##283C7A	1.00	10.41	2.02	10.41
#FFFFFF	10.41	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B447C

Deuteranopia (green-blind)

#083C79

Tritanopia (blue-blind)

#004A55

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283c7a;
/* rgb */ color: rgb(40, 60, 122);
/* oklch */ color: oklch(37.6% 0.108 267.5);

Tailwind

colors: {
  custom: {
    50: '#6b71a1',
    500: '#283c7a',
    950: '#000000',
  },
}

SCSS

$custom: #283c7a;
$custom-light: #6b71a1;
$custom-dark: #000000;

JSON

{
  "hex": "#283c7a",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 122
  },
  "hsl": {
    "h": 225.366,
    "s": 50.617,
    "l": 31.765
  },
  "oklch": {
    "l": 0.37554,
    "c": 0.10836,
    "h": 267.5
  },
  "luminance": 0.05088
}

Semantic roles & 50–950 ramp

primary

#283C7A

secondary

#AC9652

accent

#B84EDA

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070F

muted

#7A7A7E

Preview Lab

Preview with #283C7A

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

Preview Lab → · Contrast checker → · Palette generator →