#3F599D#3F599D

#3F599D is a mid, moderate blue. Relative luminance 0.106; OKLCH L 47.8% C 0.114 H 266.4°. Best body text is #FFFFFF at 6.72:1 contrast (WCAG AA passes).

Color values

HEX	#3F599D
RGB	rgb(63, 89, 157)
HSL	hsl(223, 43%, 43%)
HSV	hsv(223, 60%, 62%)
CMYK	cmyk(59.9%, 43.3%, 0%, 38.4%)
CIE-LAB	lab(38.96, 11.88, -40.03)
CIE-LCH	lch(38.96, 41.75, 286.53°)
OKLab	oklab(47.79% -0.0072 -0.1139)
OKLCH	oklch(47.79% 0.114 266.4)
XYZ	xyz(11.7060, 10.6349, 33.3276)
Luminance	0.1064 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F599D #9D833F

analogous

#3F889D #3F599D #543F9D

triadic

#3F599D #9D3F59 #599D3F

tetradic

#3F599D #9D3F88 #9D833F #3F9D54

square

#3F599D #9D3F88 #9D833F #3F9D54

split-complementary

#3F599D #9D543F #889D3F

monochromatic

#1C2746 #2D4071 #3F599D #5C77BD #879BCF

Accessibility & contrast

On white

6.72

#3F599D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.13

#3F599D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F599D

6.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F599D	#FFFFFF	#000000	##FFFFFF
##3F599D	1.00	6.72	3.13	6.72
#FFFFFF	6.72	1.00	21.00	1.00
#000000	3.13	21.00	1.00	21.00
##FFFFFF	6.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B60A0

Deuteranopia (green-blind)

#2E589C

Tritanopia (blue-blind)

#006873

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3f599d;
/* rgb */ color: rgb(63, 89, 157);
/* oklch */ color: oklch(47.8% 0.114 266.4);

Tailwind

colors: {
  custom: {
    50: '#7c87ba',
    500: '#3f599d',
    950: '#000000',
  },
}

SCSS

$custom: #3f599d;
$custom-light: #7c87ba;
$custom-dark: #000000;

JSON

{
  "hex": "#3f599d",
  "rgb": {
    "r": 63,
    "g": 89,
    "b": 157
  },
  "hsl": {
    "h": 223.404,
    "s": 42.727,
    "l": 43.137
  },
  "oklch": {
    "l": 0.4779,
    "c": 0.11416,
    "h": 266.4
  },
  "luminance": 0.10636
}

Semantic roles & 50–950 ramp

primary

#3F599D

secondary

#BAA97E

accent

#B055D3

background

#F7F8FB

surface

#EEEFF6

border

#C9CAD0

text

#0A0B12

muted

#7C7C81

Preview Lab

Preview with #3F599D

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

Preview Lab → · Contrast checker → · Palette generator →