#283BA3#283BA3

#283BA3 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.8% C 0.168 H 269.3°. Best body text is #FFFFFF at 9.36:1 contrast (WCAG AA passes).

Color values

HEX	#283BA3
RGB	rgb(40, 59, 163)
HSL	hsl(231, 61%, 40%)
HSV	hsv(231, 75%, 64%)
CMYK	cmyk(75.5%, 63.8%, 0%, 36.1%)
CIE-LAB	lab(29.97, 30.17, -58.23)
CIE-LCH	lch(29.97, 65.58, 297.39°)
OKLab	oklab(40.81% -0.0021 -0.1683)
OKLCH	oklch(40.81% 0.168 269.3)
XYZ	xyz(9.0476, 6.2224, 35.3674)
Luminance	0.0622 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283BA3 #A39028

analogous

#2878A3 #283BA3 #5328A3

triadic

#283BA3 #A3283B #3BA328

tetradic

#283BA3 #A32878 #A39028 #28A353

square

#283BA3 #A32878 #A39028 #28A353

split-complementary

#283BA3 #A35328 #78A328

monochromatic

#101741 #1C2972 #283BA3 #3A51CF #6B7CDB

Accessibility & contrast

On white

9.36

#283BA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#283BA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283BA3

9.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283BA3	#FFFFFF	#000000	##FFFFFF
##283BA3	1.00	9.36	2.24	9.36
#FFFFFF	9.36	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA6

Deuteranopia (green-blind)

#0041A1

Tritanopia (blue-blind)

#005669

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #283ba3;
/* rgb */ color: rgb(40, 59, 163);
/* oklch */ color: oklch(40.8% 0.168 269.3);

Tailwind

colors: {
  custom: {
    50: '#7570bf',
    500: '#283ba3',
    950: '#000000',
  },
}

SCSS

$custom: #283ba3;
$custom-light: #7570bf;
$custom-dark: #000000;

JSON

{
  "hex": "#283ba3",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 163
  },
  "hsl": {
    "h": 230.732,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.40811,
    "c": 0.16832,
    "h": 269.3
  },
  "luminance": 0.06223
}

Semantic roles & 50–950 ramp

primary

#283BA3

secondary

#C1B366

accent

#CB44E4

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #283BA3

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

Preview Lab → · Contrast checker → · Palette generator →