#3F659B#3F659B

#3F659B is a mid, moderate blue. Relative luminance 0.127; OKLCH L 50.4% C 0.097 H 257.3°. Best body text is #FFFFFF at 5.92:1 contrast (WCAG AA passes).

Color values

HEX	#3F659B
RGB	rgb(63, 101, 155)
HSL	hsl(215, 42%, 43%)
HSV	hsv(215, 59%, 61%)
CMYK	cmyk(59.4%, 34.8%, 0%, 39.2%)
CIE-LAB	lab(42.35, 3.54, -33.46)
CIE-LCH	lch(42.35, 33.64, 276.05°)
OKLab	oklab(50.38% -0.0213 -0.0946)
OKLCH	oklch(50.38% 0.097 257.3)
XYZ	xyz(12.6179, 12.7296, 32.7961)
Luminance	0.1273 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F659B #9B753F

analogous

#3F939B #3F659B #473F9B

triadic

#3F659B #9B3F65 #659B3F

tetradic

#3F659B #9B3F93 #9B753F #3F9B47

square

#3F659B #9B3F93 #9B753F #3F9B47

split-complementary

#3F659B #9B473F #939B3F

monochromatic

#1C2C44 #2D496F #3F659B #5B83BC #86A4CE

Accessibility & contrast

On white

5.92

#3F659B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#3F659B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F659B

5.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F659B	#FFFFFF	#000000	##FFFFFF
##3F659B	1.00	5.92	3.55	5.92
#FFFFFF	5.92	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F699D

Deuteranopia (green-blind)

#43609A

Tritanopia (blue-blind)

#007179

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3f659b;
/* rgb */ color: rgb(63, 101, 155);
/* oklch */ color: oklch(50.4% 0.097 257.3);

Tailwind

colors: {
  custom: {
    50: '#7c90b9',
    500: '#3f659b',
    950: '#000000',
  },
}

SCSS

$custom: #3f659b;
$custom-light: #7c90b9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f659b",
  "rgb": {
    "r": 63,
    "g": 101,
    "b": 155
  },
  "hsl": {
    "h": 215.217,
    "s": 42.202,
    "l": 42.745
  },
  "oklch": {
    "l": 0.50384,
    "c": 0.09696,
    "h": 257.3
  },
  "luminance": 0.12731
}

Semantic roles & 50–950 ramp

primary

#3F659B

secondary

#B8A07D

accent

#9F56D2

background

#F7F8FB

surface

#EEF0F6

border

#C9CBD0

text

#0A0C11

muted

#7C7D80

Preview Lab

Preview with #3F659B

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

Preview Lab → · Contrast checker → · Palette generator →