#3F75B3#3F75B3

#3F75B3 is a mid, moderate cyan. Relative luminance 0.170; OKLCH L 55.4% C 0.113 H 253.3°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#3F75B3
RGB	rgb(63, 117, 179)
HSL	hsl(212, 48%, 47%)
HSV	hsv(212, 65%, 70%)
CMYK	cmyk(64.8%, 34.6%, 0%, 29.8%)
CIE-LAB	lab(48.30, 2.02, -38.17)
CIE-LCH	lch(48.30, 38.23, 273.03°)
OKLab	oklab(55.43% -0.0325 -0.1082)
OKLCH	oklch(55.43% 0.113 253.3)
XYZ	xyz(16.5449, 17.0324, 45.0547)
Luminance	0.1703 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75B3 #B37D3F

analogous

#3FAFB3 #3F75B3 #433FB3

triadic

#3F75B3 #B33F75 #75B33F

tetradic

#3F75B3 #B33FAF #B37D3F #3FB343

square

#3F75B3 #B33FAF #B37D3F #3FB343

split-complementary

#3F75B3 #B3433F #AFB33F

monochromatic

#1F3A58 #2F5786 #3F75B3 #6694C9 #93B4D9

Accessibility & contrast

On white

4.77

#3F75B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.41

#3F75B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F75B3

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75B3	#FFFFFF	#000000	##FFFFFF
##3F75B3	1.00	4.77	4.41	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.41	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A79B6

Deuteranopia (green-blind)

#4A6EB2

Tritanopia (blue-blind)

#00838C

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f75b3;
/* rgb */ color: rgb(63, 117, 179);
/* oklch */ color: oklch(55.4% 0.113 253.3);

Tailwind

colors: {
  custom: {
    50: '#7f9cca',
    500: '#3f75b3',
    950: '#000000',
  },
}

SCSS

$custom: #3f75b3;
$custom-light: #7f9cca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75b3",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 179
  },
  "hsl": {
    "h": 212.069,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.55433,
    "c": 0.11293,
    "h": 253.3
  },
  "luminance": 0.17034
}

Semantic roles & 50–950 ramp

primary

#3F75B3

secondary

#C4A989

accent

#9950D8

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3F75B3

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

Preview Lab → · Contrast checker → · Palette generator →