#283AA5#283AA5

#283AA5 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.8% C 0.172 H 269.5°. Best body text is #FFFFFF at 9.38:1 contrast (WCAG AA passes).

Color values

HEX	#283AA5
RGB	rgb(40, 58, 165)
HSL	hsl(231, 61%, 40%)
HSV	hsv(231, 76%, 65%)
CMYK	cmyk(75.8%, 64.8%, 0%, 35.3%)
CIE-LAB	lab(29.89, 31.56, -59.55)
CIE-LCH	lch(29.89, 67.40, 297.92°)
OKLab	oklab(40.81% -0.0015 -0.1722)
OKLCH	oklch(40.81% 0.172 269.5)
XYZ	xyz(9.1773, 6.1929, 36.3017)
Luminance	0.0619 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283AA5 #A59328

analogous

#2878A5 #283AA5 #5428A5

triadic

#283AA5 #A5283A #3AA528

tetradic

#283AA5 #A52878 #A59328 #28A554

square

#283AA5 #A52878 #A59328 #28A554

split-complementary

#283AA5 #A55428 #78A528

monochromatic

#101742 #1C2974 #283AA5 #3B50CF #6C7CDB

Accessibility & contrast

On white

9.38

#283AA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#283AA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283AA5

9.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283AA5	#FFFFFF	#000000	##FFFFFF
##283AA5	1.00	9.38	2.24	9.38
#FFFFFF	9.38	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA8

Deuteranopia (green-blind)

#0041A3

Tritanopia (blue-blind)

#00566A

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #283aa5;
/* rgb */ color: rgb(40, 58, 165);
/* oklch */ color: oklch(40.8% 0.172 269.5);

Tailwind

colors: {
  custom: {
    50: '#7670c1',
    500: '#283aa5',
    950: '#000000',
  },
}

SCSS

$custom: #283aa5;
$custom-light: #7670c1;
$custom-dark: #000000;

JSON

{
  "hex": "#283aa5",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 165
  },
  "hsl": {
    "h": 231.36,
    "s": 60.976,
    "l": 40.196
  },
  "oklch": {
    "l": 0.40812,
    "c": 0.17221,
    "h": 269.5
  },
  "luminance": 0.06194
}

Semantic roles & 50–950 ramp

primary

#283AA5

secondary

#C2B567

accent

#CD44E4

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #283AA5

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

Preview Lab → · Contrast checker → · Palette generator →