#284FA4#284FA4

#284FA4 is a dark, vivid blue. Relative luminance 0.087; OKLCH L 44.9% C 0.145 H 263.2°. Best body text is #FFFFFF at 7.65:1 contrast (WCAG AA passes).

Color values

HEX#284FA4
RGBrgb(40, 79, 164)
HSLhsl(221, 61%, 40%)
HSVhsv(221, 76%, 64%)
CMYKcmyk(75.6%, 51.8%, 0%, 35.7%)
CIE-LABlab(35.44, 17.17, -49.92)
CIE-LCHlch(35.44, 52.79, 288.98°)
OKLaboklab(44.94% -0.017 -0.1436)
OKLCHoklch(44.94% 0.145 263.2)
XYZxyz(10.3695, 8.7223, 36.2518)
Luminance0.0872 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#284FA4 #A47D28
analogous
#288DA4 #284FA4 #3F28A4
triadic
#284FA4 #A4284F #4FA428
tetradic
#284FA4 #A4288D #A47D28 #28A43F
square
#284FA4 #A4288D #A47D28 #28A43F
split-complementary
#284FA4 #A43F28 #8DA428
monochromatic
#102042 #1C3773 #284FA4 #3A69CF #6B8FDB

Accessibility & contrast

On white

7.65
#284FA4 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.74
#284FA4 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284FA4
7.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##284FA4#FFFFFF#000000##FFFFFF
##284FA41.007.652.747.65
#FFFFFF7.651.0021.001.00
#0000002.7421.001.0021.00
##FFFFFF7.651.0021.001.00

Color blindness preview

Protanopia (red-blind)
#1959A7
Deuteranopia (green-blind)
#004EA2
Tritanopia (blue-blind)
#006372
Achromatopsia (no color)
#535353

Design tokens & code

CSS
--color: #284fa4;
/* rgb */ color: rgb(40, 79, 164);
/* oklch */ color: oklch(44.9% 0.145 263.2);
Tailwind
colors: {
  custom: {
    50: '#747fc0',
    500: '#284fa4',
    950: '#000000',
  },
}
SCSS
$custom: #284fa4;
$custom-light: #747fc0;
$custom-dark: #000000;
JSON
{
  "hex": "#284fa4",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 164
  },
  "hsl": {
    "h": 221.129,
    "s": 60.784,
    "l": 40
  },
  "oklch": {
    "l": 0.44943,
    "c": 0.14461,
    "h": 263.2
  },
  "luminance": 0.08723
}

Semantic roles & 50–950 ramp

primary
#284FA4
secondary
#C1A566
accent
#B244E4
background
#F7F7FB
surface
#EEEEF7
border
#C9C9D0
text
#090A12
muted
#7B7C81

Preview Lab

Preview with #284FA4

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

Preview Lab → · Contrast checker → · Palette generator →

#284FA4 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva