#283DAB#283DAB

#283DAB is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.9% C 0.177 H 268.8°. Best body text is #FFFFFF at 8.95:1 contrast (WCAG AA passes).

Color values

HEX	#283DAB
RGB	rgb(40, 61, 171)
HSL	hsl(230, 62%, 41%)
HSV	hsv(230, 77%, 67%)
CMYK	cmyk(76.6%, 64.3%, 0%, 32.9%)
CIE-LAB	lab(31.18, 31.83, -61.05)
CIE-LCH	lch(31.18, 68.85, 297.54°)
OKLab	oklab(41.92% -0.0037 -0.1766)
OKLCH	oklch(41.92% 0.177 268.8)
XYZ	xyz(9.8920, 6.7278, 39.2974)
Luminance	0.0673 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283DAB #AB9628

analogous

#287FAB #283DAB #5528AB

triadic

#283DAB #AB283D #3DAB28

tetradic

#283DAB #AB287F #AB9628 #28AB55

square

#283DAB #AB287F #AB9628 #28AB55

split-complementary

#283DAB #AB5528 #7FAB28

monochromatic

#111A48 #1C2B79 #283DAB #3E56D2 #7081DE

Accessibility & contrast

On white

8.95

#283DAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#283DAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283DAB

8.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283DAB	#FFFFFF	#000000	##FFFFFF
##283DAB	1.00	8.95	2.35	8.95
#FFFFFF	8.95	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AF

Deuteranopia (green-blind)

#0043A9

Tritanopia (blue-blind)

#005A6E

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #283dab;
/* rgb */ color: rgb(40, 61, 171);
/* oklch */ color: oklch(41.9% 0.177 268.8);

Tailwind

colors: {
  custom: {
    50: '#7772c5',
    500: '#283dab',
    950: '#000000',
  },
}

SCSS

$custom: #283dab;
$custom-light: #7772c5;
$custom-dark: #000000;

JSON

{
  "hex": "#283dab",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 171
  },
  "hsl": {
    "h": 230.382,
    "s": 62.085,
    "l": 41.373
  },
  "oklch": {
    "l": 0.41922,
    "c": 0.17661,
    "h": 268.8
  },
  "luminance": 0.06729
}

Semantic roles & 50–950 ramp

primary

#283DAB

secondary

#C4B66A

accent

#CB43E5

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #283DAB

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

Preview Lab → · Contrast checker → · Palette generator →