#3F7FB3#3F7FB3

#3F7FB3 is a mid, moderate cyan. Relative luminance 0.195; OKLCH L 57.8% C 0.104 H 245.5°. Best body text is #000000 at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#3F7FB3
RGB	rgb(63, 127, 179)
HSL	hsl(207, 48%, 47%)
HSV	hsv(207, 65%, 70%)
CMYK	cmyk(64.8%, 29.1%, 0%, 29.8%)
CIE-LAB	lab(51.25, -3.97, -33.53)
CIE-LCH	lch(51.25, 33.76, 263.25°)
OKLab	oklab(57.75% -0.0431 -0.0945)
OKLCH	oklch(57.75% 0.104 245.5)
XYZ	xyz(17.7729, 19.4884, 45.4641)
Luminance	0.1949 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7FB3 #B3733F

analogous

#3FB3AD #3F7FB3 #3F45B3

triadic

#3F7FB3 #B33F7F #7FB33F

tetradic

#3F7FB3 #AD3FB3 #B3733F #45B33F

square

#3F7FB3 #AD3FB3 #B3733F #45B33F

split-complementary

#3F7FB3 #B33F45 #B3AD3F

monochromatic

#1F3F58 #2F5F86 #3F7FB3 #669DC9 #93BAD9

Accessibility & contrast

On white

4.29

#3F7FB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.90

#3F7FB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7FB3

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7FB3	#FFFFFF	#000000	##000000
##3F7FB3	1.00	4.29	4.90	4.90
#FFFFFF	4.29	1.00	21.00	21.00
#000000	4.90	21.00	1.00	1.00
##000000	4.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6880B5

Deuteranopia (green-blind)

#5875B2

Tritanopia (blue-blind)

#008B91

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3f7fb3;
/* rgb */ color: rgb(63, 127, 179);
/* oklch */ color: oklch(57.8% 0.104 245.5);

Tailwind

colors: {
  custom: {
    50: '#80a3ca',
    500: '#3f7fb3',
    950: '#000000',
  },
}

SCSS

$custom: #3f7fb3;
$custom-light: #80a3ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7fb3",
  "rgb": {
    "r": 63,
    "g": 127,
    "b": 179
  },
  "hsl": {
    "h": 206.897,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.57753,
    "c": 0.1039,
    "h": 245.5
  },
  "luminance": 0.1949
}

Semantic roles & 50–950 ramp

primary

#3F7FB3

secondary

#C4A489

accent

#8D50D8

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #3F7FB3

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

Preview Lab → · Contrast checker → · Palette generator →