#283F80#283F80

#283F80 is a dark, moderate blue. Relative luminance 0.056; OKLCH L 38.7% C 0.113 H 266.5°. Best body text is #FFFFFF at 9.94:1 contrast (WCAG AA passes).

Color values

HEX	#283F80
RGB	rgb(40, 63, 128)
HSL	hsl(224, 52%, 33%)
HSV	hsv(224, 69%, 50%)
CMYK	cmyk(68.8%, 50.8%, 0%, 49.8%)
CIE-LAB	lab(28.28, 14.08, -39.47)
CIE-LCH	lch(28.28, 41.91, 289.64°)
OKLab	oklab(38.68% -0.0069 -0.1131)
OKLCH	oklch(38.68% 0.113 266.5)
XYZ	xyz(6.5475, 5.5640, 21.1468)
Luminance	0.0556 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F80 #806928

analogous

#286B80 #283F80 #3D2880

triadic

#283F80 #80283F #3F8028

tetradic

#283F80 #80286B #806928 #28803D

square

#283F80 #80286B #806928 #28803D

split-complementary

#283F80 #803D28 #6B8028

monochromatic

#0B1123 #192851 #283F80 #3756AF #5876CB

Accessibility & contrast

On white

9.94

#283F80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#283F80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F80

9.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F80	#FFFFFF	#000000	##FFFFFF
##283F80	1.00	9.94	2.11	9.94
#FFFFFF	9.94	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C4782

Deuteranopia (green-blind)

#043F7F

Tritanopia (blue-blind)

#004E59

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #283f80;
/* rgb */ color: rgb(40, 63, 128);
/* oklch */ color: oklch(38.7% 0.113 266.5);

Tailwind

colors: {
  custom: {
    50: '#6d73a5',
    500: '#283f80',
    950: '#000000',
  },
}

SCSS

$custom: #283f80;
$custom-light: #6d73a5;
$custom-dark: #000000;

JSON

{
  "hex": "#283f80",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 128
  },
  "hsl": {
    "h": 224.318,
    "s": 52.381,
    "l": 32.941
  },
  "oklch": {
    "l": 0.3868,
    "c": 0.11334,
    "h": 266.5
  },
  "luminance": 0.05565
}

Semantic roles & 50–950 ramp

primary

#283F80

secondary

#B09854

accent

#B64CDC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08080F

muted

#7B7B7F

Preview Lab

Preview with #283F80

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

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