#284AA5#284AA5

#284AA5 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.0% C 0.152 H 265.1°. Best body text is #FFFFFF at 8.04:1 contrast (WCAG AA passes).

Color values

HEX	#284AA5
RGB	rgb(40, 74, 165)
HSL	hsl(224, 61%, 40%)
HSV	hsv(224, 76%, 65%)
CMYK	cmyk(75.8%, 55.2%, 0%, 35.3%)
CIE-LAB	lab(34.12, 20.91, -52.67)
CIE-LCH	lch(34.12, 56.67, 291.65°)
OKLab	oklab(43.96% -0.0129 -0.1518)
OKLCH	oklch(43.96% 0.152 265.1)
XYZ	xyz(10.1130, 8.0642, 36.6136)
Luminance	0.0806 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284AA5 #A58328

analogous

#2888A5 #284AA5 #4428A5

triadic

#284AA5 #A5284A #4AA528

tetradic

#284AA5 #A52888 #A58328 #28A544

square

#284AA5 #A52888 #A58328 #28A544

split-complementary

#284AA5 #A54428 #88A528

monochromatic

#101E42 #1C3474 #284AA5 #3B63CF #6C8ADB

Accessibility & contrast

On white

8.04

#284AA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#284AA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284AA5

8.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284AA5	#FFFFFF	#000000	##FFFFFF
##284AA5	1.00	8.04	2.61	8.04
#FFFFFF	8.04	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056A8

Deuteranopia (green-blind)

#004BA3

Tritanopia (blue-blind)

#006070

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #284aa5;
/* rgb */ color: rgb(40, 74, 165);
/* oklch */ color: oklch(44.0% 0.152 265.1);

Tailwind

colors: {
  custom: {
    50: '#747cc0',
    500: '#284aa5',
    950: '#000000',
  },
}

SCSS

$custom: #284aa5;
$custom-light: #747cc0;
$custom-dark: #000000;

JSON

{
  "hex": "#284aa5",
  "rgb": {
    "r": 40,
    "g": 74,
    "b": 165
  },
  "hsl": {
    "h": 223.68,
    "s": 60.976,
    "l": 40.196
  },
  "oklch": {
    "l": 0.43959,
    "c": 0.15234,
    "h": 265.1
  },
  "luminance": 0.08065
}

Semantic roles & 50–950 ramp

primary

#284AA5

secondary

#C2A967

accent

#B844E4

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284AA5

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

Preview Lab → · Contrast checker → · Palette generator →