#283DA5#283DA5

#283DA5 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.4% C 0.169 H 268.8°. Best body text is #FFFFFF at 9.13:1 contrast (WCAG AA passes).

Color values

HEX	#283DA5
RGB	rgb(40, 61, 165)
HSL	hsl(230, 61%, 40%)
HSV	hsv(230, 76%, 65%)
CMYK	cmyk(75.8%, 63%, 0%, 35.3%)
CIE-LAB	lab(30.65, 29.59, -58.32)
CIE-LCH	lch(30.65, 65.40, 296.91°)
OKLab	oklab(41.37% -0.0035 -0.1685)
OKLCH	oklch(41.37% 0.169 268.8)
XYZ	xyz(9.3330, 6.5042, 36.3536)
Luminance	0.0650 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283DA5 #A59028

analogous

#287BA5 #283DA5 #5128A5

triadic

#283DA5 #A5283D #3DA528

tetradic

#283DA5 #A5287B #A59028 #28A551

square

#283DA5 #A5287B #A59028 #28A551

split-complementary

#283DA5 #A55128 #7BA528

monochromatic

#101942 #1C2B74 #283DA5 #3B54CF #6C7FDB

Accessibility & contrast

On white

9.13

#283DA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#283DA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283DA5

9.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283DA5	#FFFFFF	#000000	##FFFFFF
##283DA5	1.00	9.13	2.30	9.13
#FFFFFF	9.13	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA8

Deuteranopia (green-blind)

#0042A3

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #283da5;
/* rgb */ color: rgb(40, 61, 165);
/* oklch */ color: oklch(41.4% 0.169 268.8);

Tailwind

colors: {
  custom: {
    50: '#7572c1',
    500: '#283da5',
    950: '#000000',
  },
}

SCSS

$custom: #283da5;
$custom-light: #7572c1;
$custom-dark: #000000;

JSON

{
  "hex": "#283da5",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 165
  },
  "hsl": {
    "h": 229.92,
    "s": 60.976,
    "l": 40.196
  },
  "oklch": {
    "l": 0.41369,
    "c": 0.16859,
    "h": 268.8
  },
  "luminance": 0.06505
}

Semantic roles & 50–950 ramp

primary

#283DA5

secondary

#C2B367

accent

#C944E4

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #283DA5

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

Preview Lab → · Contrast checker → · Palette generator →