#284D81#284D81

#284D81 is a dark, moderate blue. Relative luminance 0.073; OKLCH L 42.0% C 0.097 H 257.2°. Best body text is #FFFFFF at 8.51:1 contrast (WCAG AA passes).

Color values

HEX	#284D81
RGB	rgb(40, 77, 129)
HSL	hsl(215, 53%, 33%)
HSV	hsv(215, 69%, 51%)
CMYK	cmyk(69%, 40.3%, 0%, 49.4%)
CIE-LAB	lab(32.58, 4.99, -33.23)
CIE-LCH	lch(32.58, 33.60, 278.53°)
OKLab	oklab(42% -0.0214 -0.0946)
OKLCH	oklch(42% 0.097 257.2)
XYZ	xyz(7.4900, 7.3431, 21.7873)
Luminance	0.0734 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284D81 #815C28

analogous

#287981 #284D81 #2F2881

triadic

#284D81 #81284D #4D8128

tetradic

#284D81 #812879 #815C28 #28812F

square

#284D81 #812879 #815C28 #28812F

split-complementary

#284D81 #812F28 #798128

monochromatic

#0B1524 #1A3152 #284D81 #3669B0 #5888CB

Accessibility & contrast

On white

8.51

#284D81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#284D81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284D81

8.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284D81	#FFFFFF	#000000	##FFFFFF
##284D81	1.00	8.51	2.47	8.51
#FFFFFF	8.51	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#365183

Deuteranopia (green-blind)

#284980

Tritanopia (blue-blind)

#005960

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #284d81;
/* rgb */ color: rgb(40, 77, 129);
/* oklch */ color: oklch(42.0% 0.097 257.2);

Tailwind

colors: {
  custom: {
    50: '#6c7ea6',
    500: '#284d81',
    950: '#000000',
  },
}

SCSS

$custom: #284d81;
$custom-light: #6c7ea6;
$custom-dark: #000000;

JSON

{
  "hex": "#284d81",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 129
  },
  "hsl": {
    "h": 215.056,
    "s": 52.663,
    "l": 33.137
  },
  "oklch": {
    "l": 0.42004,
    "c": 0.09697,
    "h": 257.2
  },
  "luminance": 0.07344
}

Semantic roles & 50–950 ramp

primary

#284D81

secondary

#B08A54

accent

#A04CDC

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#07090F

muted

#7A7B7F

Preview Lab

Preview with #284D81

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

Preview Lab → · Contrast checker → · Palette generator →