#3F588D#3F588D

#3F588D is a mid, moderate blue. Relative luminance 0.100; OKLCH L 46.6% C 0.092 H 264.0°. Best body text is #FFFFFF at 7.02:1 contrast (WCAG AA passes).

Color values

HEX	#3F588D
RGB	rgb(63, 88, 141)
HSL	hsl(221, 38%, 40%)
HSV	hsv(221, 55%, 55%)
CMYK	cmyk(55.3%, 37.6%, 0%, 44.7%)
CIE-LAB	lab(37.77, 6.97, -32.28)
CIE-LCH	lch(37.77, 33.02, 282.19°)
OKLab	oklab(46.58% -0.0095 -0.0913)
OKLCH	oklch(46.58% 0.092 264)
XYZ	xyz(10.3457, 9.9585, 26.5711)
Luminance	0.0996 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F588D #8D743F

analogous

#3F7F8D #3F588D #4D3F8D

triadic

#3F588D #8D3F58 #588D3F

tetradic

#3F588D #8D3F7F #8D743F #3F8D4D

square

#3F588D #8D3F7F #8D743F #3F8D4D

split-complementary

#3F588D #8D4D3F #7F8D3F

monochromatic

#192338 #2C3E63 #3F588D #5674B3 #8097C6

Accessibility & contrast

On white

7.02

#3F588D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.99

#3F588D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F588D

7.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F588D	#FFFFFF	#000000	##FFFFFF
##3F588D	1.00	7.02	2.99	7.02
#FFFFFF	7.02	1.00	21.00	1.00
#000000	2.99	21.00	1.00	21.00
##FFFFFF	7.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#435D8F

Deuteranopia (green-blind)

#39568C

Tritanopia (blue-blind)

#15646C

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3f588d;
/* rgb */ color: rgb(63, 88, 141);
/* oklch */ color: oklch(46.6% 0.092 264.0);

Tailwind

colors: {
  custom: {
    50: '#7a86ae',
    500: '#3f588d',
    950: '#000000',
  },
}

SCSS

$custom: #3f588d;
$custom-light: #7a86ae;
$custom-dark: #000000;

JSON

{
  "hex": "#3f588d",
  "rgb": {
    "r": 63,
    "g": 88,
    "b": 141
  },
  "hsl": {
    "h": 220.769,
    "s": 38.235,
    "l": 40
  },
  "oklch": {
    "l": 0.46578,
    "c": 0.09176,
    "h": 264
  },
  "luminance": 0.09959
}

Semantic roles & 50–950 ramp

primary

#3F588D

secondary

#B19E77

accent

#A95ACE

background

#F7F8FA

surface

#EEEFF4

border

#C9CACE

text

#0A0B10

muted

#7C7C7F

Preview Lab

Preview with #3F588D

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

Preview Lab → · Contrast checker → · Palette generator →