#284DA1#284DA1

#284DA1 is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.3% C 0.143 H 263.7°. Best body text is #FFFFFF at 7.88:1 contrast (WCAG AA passes).

Color values

HEX	#284DA1
RGB	rgb(40, 77, 161)
HSL	hsl(222, 60%, 39%)
HSV	hsv(222, 75%, 63%)
CMYK	cmyk(75.2%, 52.2%, 0%, 36.9%)
CIE-LAB	lab(34.66, 17.35, -49.39)
CIE-LCH	lch(34.66, 52.34, 289.36°)
OKLab	oklab(44.28% -0.0157 -0.1421)
OKLCH	oklch(44.28% 0.143 263.7)
XYZ	xyz(9.9597, 8.3310, 34.7944)
Luminance	0.0833 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284DA1 #A17C28

analogous

#288AA1 #284DA1 #4028A1

triadic

#284DA1 #A1284D #4DA128

tetradic

#284DA1 #A1288A #A17C28 #28A140

square

#284DA1 #A1288A #A17C28 #28A140

split-complementary

#284DA1 #A14028 #8AA128

monochromatic

#101E3F #1C3670 #284DA1 #3966CE #6A8CDA

Accessibility & contrast

On white

7.88

#284DA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#284DA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284DA1

7.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284DA1	#FFFFFF	#000000	##FFFFFF
##284DA1	1.00	7.88	2.67	7.88
#FFFFFF	7.88	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1757A4

Deuteranopia (green-blind)

#004C9F

Tritanopia (blue-blind)

#00616F

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #284da1;
/* rgb */ color: rgb(40, 77, 161);
/* oklch */ color: oklch(44.3% 0.143 263.7);

Tailwind

colors: {
  custom: {
    50: '#737ebd',
    500: '#284da1',
    950: '#000000',
  },
}

SCSS

$custom: #284da1;
$custom-light: #737ebd;
$custom-dark: #000000;

JSON

{
  "hex": "#284da1",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 161
  },
  "hsl": {
    "h": 221.653,
    "s": 60.199,
    "l": 39.412
  },
  "oklch": {
    "l": 0.44281,
    "c": 0.14293,
    "h": 263.7
  },
  "luminance": 0.08332
}

Semantic roles & 50–950 ramp

primary

#284DA1

secondary

#C0A465

accent

#B344E3

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284DA1

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

Preview Lab → · Contrast checker → · Palette generator →