#284AA3#284AA3

#284AA3 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 43.8% C 0.150 H 265.0°. Best body text is #FFFFFF at 8.08:1 contrast (WCAG AA passes).

Color values

HEX	#284AA3
RGB	rgb(40, 74, 163)
HSL	hsl(223, 61%, 40%)
HSV	hsv(223, 75%, 64%)
CMYK	cmyk(75.5%, 54.6%, 0%, 36.1%)
CIE-LAB	lab(33.97, 20.14, -51.71)
CIE-LCH	lch(33.97, 55.50, 291.28°)
OKLab	oklab(43.8% -0.0131 -0.149)
OKLCH	oklch(43.8% 0.15 265)
XYZ	xyz(9.9324, 7.9919, 35.6624)
Luminance	0.0799 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284AA3 #A38128

analogous

#2887A3 #284AA3 #4428A3

triadic

#284AA3 #A3284A #4AA328

tetradic

#284AA3 #A32887 #A38128 #28A344

square

#284AA3 #A32887 #A38128 #28A344

split-complementary

#284AA3 #A34428 #87A328

monochromatic

#101D41 #1C3472 #284AA3 #3A63CF #6B8ADB

Accessibility & contrast

On white

8.08

#284AA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#284AA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284AA3

8.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284AA3	#FFFFFF	#000000	##FFFFFF
##284AA3	1.00	8.08	2.60	8.08
#FFFFFF	8.08	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0156A6

Deuteranopia (green-blind)

#004AA1

Tritanopia (blue-blind)

#00606F

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #284aa3;
/* rgb */ color: rgb(40, 74, 163);
/* oklch */ color: oklch(43.8% 0.150 265.0);

Tailwind

colors: {
  custom: {
    50: '#747cbf',
    500: '#284aa3',
    950: '#000000',
  },
}

SCSS

$custom: #284aa3;
$custom-light: #747cbf;
$custom-dark: #000000;

JSON

{
  "hex": "#284aa3",
  "rgb": {
    "r": 40,
    "g": 74,
    "b": 163
  },
  "hsl": {
    "h": 223.415,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.43798,
    "c": 0.14954,
    "h": 265
  },
  "luminance": 0.07993
}

Semantic roles & 50–950 ramp

primary

#284AA3

secondary

#C1A866

accent

#B844E4

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284AA3

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

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