#284CA5#284CA5

#284CA5 is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.4% C 0.150 H 264.5°. Best body text is #FFFFFF at 7.87:1 contrast (WCAG AA passes).

Color values

HEX	#284CA5
RGB	rgb(40, 76, 165)
HSL	hsl(223, 61%, 40%)
HSV	hsv(223, 76%, 65%)
CMYK	cmyk(75.8%, 53.9%, 0%, 35.3%)
CIE-LAB	lab(34.67, 19.57, -51.77)
CIE-LCH	lch(34.67, 55.34, 290.71°)
OKLab	oklab(44.38% -0.0145 -0.1491)
OKLCH	oklch(44.38% 0.15 264.5)
XYZ	xyz(10.2486, 8.3355, 36.6588)
Luminance	0.0834 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284CA5 #A58128

analogous

#288AA5 #284CA5 #4228A5

triadic

#284CA5 #A5284C #4CA528

tetradic

#284CA5 #A5288A #A58128 #28A542

square

#284CA5 #A5288A #A58128 #28A542

split-complementary

#284CA5 #A54228 #8AA528

monochromatic

#101F42 #1C3574 #284CA5 #3B66CF #6C8CDB

Accessibility & contrast

On white

7.87

#284CA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#284CA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284CA5

7.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284CA5	#FFFFFF	#000000	##FFFFFF
##284CA5	1.00	7.87	2.67	7.87
#FFFFFF	7.87	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0758A8

Deuteranopia (green-blind)

#004CA3

Tritanopia (blue-blind)

#006271

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #284ca5;
/* rgb */ color: rgb(40, 76, 165);
/* oklch */ color: oklch(44.4% 0.150 264.5);

Tailwind

colors: {
  custom: {
    50: '#747dc0',
    500: '#284ca5',
    950: '#000000',
  },
}

SCSS

$custom: #284ca5;
$custom-light: #747dc0;
$custom-dark: #000000;

JSON

{
  "hex": "#284ca5",
  "rgb": {
    "r": 40,
    "g": 76,
    "b": 165
  },
  "hsl": {
    "h": 222.72,
    "s": 60.976,
    "l": 40.196
  },
  "oklch": {
    "l": 0.4438,
    "c": 0.1498,
    "h": 264.5
  },
  "luminance": 0.08337
}

Semantic roles & 50–950 ramp

primary

#284CA5

secondary

#C2A867

accent

#B644E4

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284CA5

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

Preview Lab → · Contrast checker → · Palette generator →