#283FA6#283FA6

#283FA6 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.8% C 0.167 H 268.3°. Best body text is #FFFFFF at 8.93:1 contrast (WCAG AA passes).

Color values

HEX	#283FA6
RGB	rgb(40, 63, 166)
HSL	hsl(229, 61%, 40%)
HSV	hsv(229, 76%, 65%)
CMYK	cmyk(75.9%, 62%, 0%, 34.9%)
CIE-LAB	lab(31.25, 28.65, -57.94)
CIE-LCH	lch(31.25, 64.63, 296.31°)
OKLab	oklab(41.84% -0.0048 -0.1674)
OKLCH	oklch(41.84% 0.167 268.3)
XYZ	xyz(9.5331, 6.7583, 36.8711)
Luminance	0.0676 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283FA6 #A68F28

analogous

#287EA6 #283FA6 #5028A6

triadic

#283FA6 #A6283F #3FA628

tetradic

#283FA6 #A6287E #A68F28 #28A650

square

#283FA6 #A6287E #A68F28 #28A650

split-complementary

#283FA6 #A65028 #7EA628

monochromatic

#101A43 #1C2C75 #283FA6 #3B56D0 #6D81DC

Accessibility & contrast

On white

8.93

#283FA6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#283FA6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283FA6

8.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283FA6	#FFFFFF	#000000	##FFFFFF
##283FA6	1.00	8.93	2.35	8.93
#FFFFFF	8.93	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A9

Deuteranopia (green-blind)

#0044A4

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #283fa6;
/* rgb */ color: rgb(40, 63, 166);
/* oklch */ color: oklch(41.8% 0.167 268.3);

Tailwind

colors: {
  custom: {
    50: '#7573c1',
    500: '#283fa6',
    950: '#000000',
  },
}

SCSS

$custom: #283fa6;
$custom-light: #7573c1;
$custom-dark: #000000;

JSON

{
  "hex": "#283fa6",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 166
  },
  "hsl": {
    "h": 229.048,
    "s": 61.165,
    "l": 40.392
  },
  "oklch": {
    "l": 0.4184,
    "c": 0.16749,
    "h": 268.3
  },
  "luminance": 0.06759
}

Semantic roles & 50–950 ramp

primary

#283FA6

secondary

#C2B267

accent

#C744E4

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #283FA6

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

Preview Lab → · Contrast checker → · Palette generator →