#3F589C#3F589C

#3F589C is a mid, moderate blue. Relative luminance 0.104; OKLCH L 47.5% C 0.114 H 266.9°. Best body text is #FFFFFF at 6.80:1 contrast (WCAG AA passes).

Color values

HEX	#3F589C
RGB	rgb(63, 88, 156)
HSL	hsl(224, 42%, 43%)
HSV	hsv(224, 60%, 61%)
CMYK	cmyk(59.6%, 43.6%, 0%, 38.8%)
CIE-LAB	lab(38.61, 12.17, -39.98)
CIE-LCH	lch(38.61, 41.79, 286.93°)
OKLab	oklab(47.51% -0.0062 -0.1138)
OKLCH	oklch(47.51% 0.114 266.9)
XYZ	xyz(11.5383, 10.4356, 32.8523)
Luminance	0.1044 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F589C #9C833F

analogous

#3F869C #3F589C #543F9C

triadic

#3F589C #9C3F58 #589C3F

tetradic

#3F589C #9C3F86 #9C833F #3F9C54

square

#3F589C #9C3F86 #9C833F #3F9C54

split-complementary

#3F589C #9C543F #869C3F

monochromatic

#1C2745 #2D3F70 #3F589C #5B76BD #879ACE

Accessibility & contrast

On white

6.80

#3F589C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.09

#3F589C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F589C

6.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F589C	#FFFFFF	#000000	##FFFFFF
##3F589C	1.00	6.80	3.09	6.80
#FFFFFF	6.80	1.00	21.00	1.00
#000000	3.09	21.00	1.00	21.00
##FFFFFF	6.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A5F9F

Deuteranopia (green-blind)

#2D579B

Tritanopia (blue-blind)

#006772

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3f589c;
/* rgb */ color: rgb(63, 88, 156);
/* oklch */ color: oklch(47.5% 0.114 266.9);

Tailwind

colors: {
  custom: {
    50: '#7c86b9',
    500: '#3f589c',
    950: '#000000',
  },
}

SCSS

$custom: #3f589c;
$custom-light: #7c86b9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f589c",
  "rgb": {
    "r": 63,
    "g": 88,
    "b": 156
  },
  "hsl": {
    "h": 223.871,
    "s": 42.466,
    "l": 42.941
  },
  "oklch": {
    "l": 0.47506,
    "c": 0.11397,
    "h": 266.9
  },
  "luminance": 0.10437
}

Semantic roles & 50–950 ramp

primary

#3F589C

secondary

#B9A97E

accent

#B156D2

background

#F7F8FB

surface

#EEEFF6

border

#C9CAD0

text

#0A0B11

muted

#7C7C80

Preview Lab

Preview with #3F589C

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

Preview Lab → · Contrast checker → · Palette generator →