#283BA5#283BA5

#283BA5 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.0% C 0.171 H 269.3°. Best body text is #FFFFFF at 9.30:1 contrast (WCAG AA passes).

Color values

HEX	#283BA5
RGB	rgb(40, 59, 165)
HSL	hsl(231, 61%, 40%)
HSV	hsv(231, 76%, 65%)
CMYK	cmyk(75.8%, 64.2%, 0%, 35.3%)
CIE-LAB	lab(30.14, 30.91, -59.14)
CIE-LCH	lch(30.14, 66.73, 297.59°)
OKLab	oklab(41% -0.0022 -0.171)
OKLCH	oklch(41% 0.171 269.3)
XYZ	xyz(9.2282, 6.2947, 36.3187)
Luminance	0.0630 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283BA5 #A59228

analogous

#2879A5 #283BA5 #5328A5

triadic

#283BA5 #A5283B #3BA528

tetradic

#283BA5 #A52879 #A59228 #28A553

square

#283BA5 #A52879 #A59228 #28A553

split-complementary

#283BA5 #A55328 #79A528

monochromatic

#101842 #1C2974 #283BA5 #3B51CF #6C7DDB

Accessibility & contrast

On white

9.30

#283BA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#283BA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283BA5

9.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283BA5	#FFFFFF	#000000	##FFFFFF
##283BA5	1.00	9.30	2.26	9.30
#FFFFFF	9.30	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA8

Deuteranopia (green-blind)

#0041A3

Tritanopia (blue-blind)

#00576A

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #283ba5;
/* rgb */ color: rgb(40, 59, 165);
/* oklch */ color: oklch(41.0% 0.171 269.3);

Tailwind

colors: {
  custom: {
    50: '#7671c1',
    500: '#283ba5',
    950: '#000000',
  },
}

SCSS

$custom: #283ba5;
$custom-light: #7671c1;
$custom-dark: #000000;

JSON

{
  "hex": "#283ba5",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 165
  },
  "hsl": {
    "h": 230.88,
    "s": 60.976,
    "l": 40.196
  },
  "oklch": {
    "l": 0.40996,
    "c": 0.17101,
    "h": 269.3
  },
  "luminance": 0.06296
}

Semantic roles & 50–950 ramp

primary

#283BA5

secondary

#C2B467

accent

#CC44E4

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #283BA5

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

Preview Lab → · Contrast checker → · Palette generator →