#283B80#283B80

#283B80 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.8% C 0.119 H 268.6°. Best body text is #FFFFFF at 10.36:1 contrast (WCAG AA passes).

Color values

HEX	#283B80
RGB	rgb(40, 59, 128)
HSL	hsl(227, 52%, 33%)
HSV	hsv(227, 69%, 50%)
CMYK	cmyk(68.8%, 53.9%, 0%, 49.8%)
CIE-LAB	lab(27.12, 16.84, -41.34)
CIE-LCH	lch(27.12, 44.64, 292.17°)
OKLab	oklab(37.8% -0.003 -0.1187)
OKLCH	oklch(37.8% 0.119 268.6)
XYZ	xyz(6.3340, 5.1370, 21.0756)
Luminance	0.0514 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B80 #806D28

analogous

#286780 #283B80 #412880

triadic

#283B80 #80283B #3B8028

tetradic

#283B80 #802867 #806D28 #288041

square

#283B80 #802867 #806D28 #288041

split-complementary

#283B80 #804128 #678028

monochromatic

#0B1023 #192651 #283B80 #3750AF #5871CB

Accessibility & contrast

On white

10.36

#283B80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#283B80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B80

10.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B80	#FFFFFF	#000000	##FFFFFF
##283B80	1.00	10.36	2.03	10.36
#FFFFFF	10.36	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#104482

Deuteranopia (green-blind)

#003C7F

Tritanopia (blue-blind)

#004B57

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283b80;
/* rgb */ color: rgb(40, 59, 128);
/* oklch */ color: oklch(37.8% 0.119 268.6);

Tailwind

colors: {
  custom: {
    50: '#6d70a5',
    500: '#283b80',
    950: '#000000',
  },
}

SCSS

$custom: #283b80;
$custom-light: #6d70a5;
$custom-dark: #000000;

JSON

{
  "hex": "#283b80",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 128
  },
  "hsl": {
    "h": 227.045,
    "s": 52.381,
    "l": 32.941
  },
  "oklch": {
    "l": 0.37797,
    "c": 0.11875,
    "h": 268.6
  },
  "luminance": 0.05138
}

Semantic roles & 50–950 ramp

primary

#283B80

secondary

#B09C54

accent

#BD4CDC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08070F

muted

#7A7A7F

Preview Lab

Preview with #283B80

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

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