#3F589A#3F589A

#3F589A is a mid, moderate blue. Relative luminance 0.104; OKLCH L 47.4% C 0.111 H 266.6°. Best body text is #FFFFFF at 6.83:1 contrast (WCAG AA passes).

Color values

HEX	#3F589A
RGB	rgb(63, 88, 154)
HSL	hsl(224, 42%, 43%)
HSV	hsv(224, 59%, 60%)
CMYK	cmyk(59.1%, 42.9%, 0%, 39.6%)
CIE-LAB	lab(38.50, 11.47, -38.97)
CIE-LCH	lch(38.50, 40.62, 286.40°)
OKLab	oklab(47.38% -0.0066 -0.1108)
OKLCH	oklch(47.38% 0.111 266.6)
XYZ	xyz(11.3704, 10.3684, 31.9677)
Luminance	0.1037 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F589A #9A813F

analogous

#3F869A #3F589A #533F9A

triadic

#3F589A #9A3F58 #589A3F

tetradic

#3F589A #9A3F86 #9A813F #3F9A53

square

#3F589A #9A3F86 #9A813F #3F9A53

split-complementary

#3F589A #9A533F #869A3F

monochromatic

#1B2643 #2D3F6F #3F589A #5A75BC #869ACD

Accessibility & contrast

On white

6.83

#3F589A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.07

#3F589A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F589A

6.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F589A	#FFFFFF	#000000	##FFFFFF
##3F589A	1.00	6.83	3.07	6.83
#FFFFFF	6.83	1.00	21.00	1.00
#000000	3.07	21.00	1.00	21.00
##FFFFFF	6.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B5F9D

Deuteranopia (green-blind)

#2F5799

Tritanopia (blue-blind)

#006771

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3f589a;
/* rgb */ color: rgb(63, 88, 154);
/* oklch */ color: oklch(47.4% 0.111 266.6);

Tailwind

colors: {
  custom: {
    50: '#7c86b8',
    500: '#3f589a',
    950: '#000000',
  },
}

SCSS

$custom: #3f589a;
$custom-light: #7c86b8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f589a",
  "rgb": {
    "r": 63,
    "g": 88,
    "b": 154
  },
  "hsl": {
    "h": 223.516,
    "s": 41.935,
    "l": 42.549
  },
  "oklch": {
    "l": 0.47377,
    "c": 0.11103,
    "h": 266.6
  },
  "luminance": 0.10369
}

Semantic roles & 50–950 ramp

primary

#3F589A

secondary

#B8A87D

accent

#B056D2

background

#F7F8FB

surface

#EEEFF6

border

#C9CAD0

text

#0A0B11

muted

#7C7C80

Preview Lab

Preview with #3F589A

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

Preview Lab → · Contrast checker → · Palette generator →