#284DA0#284DA0

#284DA0 is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.2% C 0.142 H 263.6°. Best body text is #FFFFFF at 7.90:1 contrast (WCAG AA passes).

Color values

HEX	#284DA0
RGB	rgb(40, 77, 160)
HSL	hsl(222, 60%, 39%)
HSV	hsv(222, 75%, 63%)
CMYK	cmyk(75%, 51.9%, 0%, 37.3%)
CIE-LAB	lab(34.59, 16.96, -48.90)
CIE-LCH	lch(34.59, 51.76, 289.13°)
OKLab	oklab(44.2% -0.0158 -0.1406)
OKLCH	oklch(44.2% 0.142 263.6)
XYZ	xyz(9.8719, 8.2959, 34.3319)
Luminance	0.0830 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284DA0 #A07B28

analogous

#2889A0 #284DA0 #3F28A0

triadic

#284DA0 #A0284D #4DA028

tetradic

#284DA0 #A02889 #A07B28 #28A03F

square

#284DA0 #A02889 #A07B28 #28A03F

split-complementary

#284DA0 #A03F28 #89A028

monochromatic

#101E3E #1C356F #284DA0 #3866CD #698CD9

Accessibility & contrast

On white

7.90

#284DA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#284DA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284DA0

7.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284DA0	#FFFFFF	#000000	##FFFFFF
##284DA0	1.00	7.90	2.66	7.90
#FFFFFF	7.90	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1857A3

Deuteranopia (green-blind)

#004C9E

Tritanopia (blue-blind)

#00616F

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #284da0;
/* rgb */ color: rgb(40, 77, 160);
/* oklch */ color: oklch(44.2% 0.142 263.6);

Tailwind

colors: {
  custom: {
    50: '#737ebd',
    500: '#284da0',
    950: '#000000',
  },
}

SCSS

$custom: #284da0;
$custom-light: #737ebd;
$custom-dark: #000000;

JSON

{
  "hex": "#284da0",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 160
  },
  "hsl": {
    "h": 221.5,
    "s": 60,
    "l": 39.216
  },
  "oklch": {
    "l": 0.44204,
    "c": 0.14153,
    "h": 263.6
  },
  "luminance": 0.08297
}

Semantic roles & 50–950 ramp

primary

#284DA0

secondary

#C0A364

accent

#B245E3

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284DA0

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

Preview Lab → · Contrast checker → · Palette generator →