#284DA5#284DA5

#284DA5 is a dark, vivid blue. Relative luminance 0.085; OKLCH L 44.6% C 0.149 H 264.1°. Best body text is #FFFFFF at 7.79:1 contrast (WCAG AA passes).

Color values

HEX	#284DA5
RGB	rgb(40, 77, 165)
HSL	hsl(222, 61%, 40%)
HSV	hsv(222, 76%, 65%)
CMYK	cmyk(75.8%, 53.3%, 0%, 35.3%)
CIE-LAB	lab(34.95, 18.90, -51.32)
CIE-LCH	lch(34.95, 54.69, 290.22°)
OKLab	oklab(44.59% -0.0153 -0.1477)
OKLCH	oklch(44.59% 0.149 264.1)
XYZ	xyz(10.3181, 8.4743, 36.6819)
Luminance	0.0848 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284DA5 #A58028

analogous

#288BA5 #284DA5 #4128A5

triadic

#284DA5 #A5284D #4DA528

tetradic

#284DA5 #A5288B #A58028 #28A541

square

#284DA5 #A5288B #A58028 #28A541

split-complementary

#284DA5 #A54128 #8BA528

monochromatic

#101F42 #1C3674 #284DA5 #3B67CF #6C8DDB

Accessibility & contrast

On white

7.79

#284DA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#284DA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284DA5

7.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284DA5	#FFFFFF	#000000	##FFFFFF
##284DA5	1.00	7.79	2.70	7.79
#FFFFFF	7.79	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E58A8

Deuteranopia (green-blind)

#004DA3

Tritanopia (blue-blind)

#006271

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #284da5;
/* rgb */ color: rgb(40, 77, 165);
/* oklch */ color: oklch(44.6% 0.149 264.1);

Tailwind

colors: {
  custom: {
    50: '#747ec0',
    500: '#284da5',
    950: '#000000',
  },
}

SCSS

$custom: #284da5;
$custom-light: #747ec0;
$custom-dark: #000000;

JSON

{
  "hex": "#284da5",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 165
  },
  "hsl": {
    "h": 222.24,
    "s": 60.976,
    "l": 40.196
  },
  "oklch": {
    "l": 0.44592,
    "c": 0.14854,
    "h": 264.1
  },
  "luminance": 0.08475
}

Semantic roles & 50–950 ramp

primary

#284DA5

secondary

#C2A767

accent

#B544E4

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284DA5

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

Preview Lab → · Contrast checker → · Palette generator →