#283CAB#283CAB

#283CAB is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.7% C 0.178 H 269.0°. Best body text is #FFFFFF at 9.03:1 contrast (WCAG AA passes).

Color values

HEX	#283CAB
RGB	rgb(40, 60, 171)
HSL	hsl(231, 62%, 41%)
HSV	hsv(231, 77%, 67%)
CMYK	cmyk(76.6%, 64.9%, 0%, 32.9%)
CIE-LAB	lab(30.93, 32.48, -61.46)
CIE-LCH	lch(30.93, 69.52, 297.86°)
OKLab	oklab(41.74% -0.0031 -0.1778)
OKLCH	oklch(41.74% 0.178 269)
XYZ	xyz(9.8391, 6.6220, 39.2798)
Luminance	0.0662 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283CAB #AB9728

analogous

#287EAB #283CAB #5628AB

triadic

#283CAB #AB283C #3CAB28

tetradic

#283CAB #AB287E #AB9728 #28AB56

square

#283CAB #AB287E #AB9728 #28AB56

split-complementary

#283CAB #AB5628 #7EAB28

monochromatic

#111948 #1C2B79 #283CAB #3E55D2 #7081DE

Accessibility & contrast

On white

9.03

#283CAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#283CAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283CAB

9.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283CAB	#FFFFFF	#000000	##FFFFFF
##283CAB	1.00	9.03	2.32	9.03
#FFFFFF	9.03	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FAF

Deuteranopia (green-blind)

#0043A9

Tritanopia (blue-blind)

#00596E

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #283cab;
/* rgb */ color: rgb(40, 60, 171);
/* oklch */ color: oklch(41.7% 0.178 269.0);

Tailwind

colors: {
  custom: {
    50: '#7771c5',
    500: '#283cab',
    950: '#000000',
  },
}

SCSS

$custom: #283cab;
$custom-light: #7771c5;
$custom-dark: #000000;

JSON

{
  "hex": "#283cab",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 171
  },
  "hsl": {
    "h": 230.84,
    "s": 62.085,
    "l": 41.373
  },
  "oklch": {
    "l": 0.41739,
    "c": 0.1778,
    "h": 269
  },
  "luminance": 0.06623
}

Semantic roles & 50–950 ramp

primary

#283CAB

secondary

#C4B76A

accent

#CC43E5

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #283CAB

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

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