#3F759B#3F759B

#3F759B is a mid, moderate cyan. Relative luminance 0.161; OKLCH L 54.2% C 0.083 H 241.2°. Best body text is #FFFFFF at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#3F759B
RGB	rgb(63, 117, 155)
HSL	hsl(205, 42%, 43%)
HSV	hsv(205, 59%, 61%)
CMYK	cmyk(59.4%, 24.5%, 0%, 39.2%)
CIE-LAB	lab(47.16, -6.17, -25.93)
CIE-LCH	lch(47.16, 26.66, 256.62°)
OKLab	oklab(54.16% -0.0399 -0.0727)
OKLCH	oklch(54.16% 0.083 241.2)
XYZ	xyz(14.3254, 16.1446, 33.3653)
Luminance	0.1615 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F759B #9B653F

analogous

#3F9B93 #3F759B #3F479B

triadic

#3F759B #9B3F75 #759B3F

tetradic

#3F759B #933F9B #9B653F #479B3F

square

#3F759B #933F9B #9B653F #479B3F

split-complementary

#3F759B #9B3F47 #9B933F

monochromatic

#1C3344 #2D546F #3F759B #5B94BC #86B0CE

Accessibility & contrast

On white

4.97

#3F759B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.23

#3F759B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F759B

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F759B	#FFFFFF	#000000	##FFFFFF
##3F759B	1.00	4.97	4.23	4.97
#FFFFFF	4.97	1.00	21.00	1.00
#000000	4.23	21.00	1.00	21.00
##FFFFFF	4.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#64759D

Deuteranopia (green-blind)

#586C9A

Tritanopia (blue-blind)

#007E82

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3f759b;
/* rgb */ color: rgb(63, 117, 155);
/* oklch */ color: oklch(54.2% 0.083 241.2);

Tailwind

colors: {
  custom: {
    50: '#7c9cb8',
    500: '#3f759b',
    950: '#000000',
  },
}

SCSS

$custom: #3f759b;
$custom-light: #7c9cb8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f759b",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 155
  },
  "hsl": {
    "h": 204.783,
    "s": 42.202,
    "l": 42.745
  },
  "oklch": {
    "l": 0.54164,
    "c": 0.08291,
    "h": 241.2
  },
  "luminance": 0.16146
}

Semantic roles & 50–950 ramp

primary

#3F759B

secondary

#B8967D

accent

#8956D2

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#0A0E11

muted

#7C7E80

Preview Lab

Preview with #3F759B

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

Preview Lab → · Contrast checker → · Palette generator →