#283DA8#283DA8

#283DA8 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.6% C 0.173 H 268.8°. Best body text is #FFFFFF at 9.04:1 contrast (WCAG AA passes).

Color values

HEX	#283DA8
RGB	rgb(40, 61, 168)
HSL	hsl(230, 62%, 41%)
HSV	hsv(230, 76%, 66%)
CMYK	cmyk(76.2%, 63.7%, 0%, 34.1%)
CIE-LAB	lab(30.91, 30.72, -59.69)
CIE-LCH	lch(30.91, 67.13, 297.23°)
OKLab	oklab(41.64% -0.0036 -0.1726)
OKLCH	oklch(41.64% 0.173 268.8)
XYZ	xyz(9.6093, 6.6147, 37.8085)
Luminance	0.0662 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283DA8 #A89328

analogous

#287DA8 #283DA8 #5328A8

triadic

#283DA8 #A8283D #3DA828

tetradic

#283DA8 #A8287D #A89328 #28A853

square

#283DA8 #A8287D #A89328 #28A853

split-complementary

#283DA8 #A85328 #7DA828

monochromatic

#101945 #1C2B77 #283DA8 #3D55D1 #6E80DC

Accessibility & contrast

On white

9.04

#283DA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#283DA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283DA8

9.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283DA8	#FFFFFF	#000000	##FFFFFF
##283DA8	1.00	9.04	2.32	9.04
#FFFFFF	9.04	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FAB

Deuteranopia (green-blind)

#0043A6

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #283da8;
/* rgb */ color: rgb(40, 61, 168);
/* oklch */ color: oklch(41.6% 0.173 268.8);

Tailwind

colors: {
  custom: {
    50: '#7672c3',
    500: '#283da8',
    950: '#000000',
  },
}

SCSS

$custom: #283da8;
$custom-light: #7672c3;
$custom-dark: #000000;

JSON

{
  "hex": "#283da8",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 168
  },
  "hsl": {
    "h": 230.156,
    "s": 61.538,
    "l": 40.784
  },
  "oklch": {
    "l": 0.41644,
    "c": 0.17261,
    "h": 268.8
  },
  "luminance": 0.06616
}

Semantic roles & 50–950 ramp

primary

#283DA8

secondary

#C3B469

accent

#CA43E5

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #283DA8

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

Preview Lab → · Contrast checker → · Palette generator →