#3F7BB3#3F7BB3

#3F7BB3 is a mid, moderate cyan. Relative luminance 0.185; OKLCH L 56.8% C 0.107 H 248.8°. Best body text is #000000 at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3F7BB3
RGB	rgb(63, 123, 179)
HSL	hsl(209, 48%, 47%)
HSV	hsv(209, 65%, 70%)
CMYK	cmyk(64.8%, 31.3%, 0%, 29.8%)
CIE-LAB	lab(50.07, -1.60, -35.39)
CIE-LCH	lch(50.07, 35.43, 267.41°)
OKLab	oklab(56.82% -0.0388 -0.1)
OKLCH	oklch(56.82% 0.107 248.8)
XYZ	xyz(17.2665, 18.4756, 45.2953)
Luminance	0.1848 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7BB3 #B3773F

analogous

#3FB3B1 #3F7BB3 #3F41B3

triadic

#3F7BB3 #B33F7B #7BB33F

tetradic

#3F7BB3 #B13FB3 #B3773F #41B33F

square

#3F7BB3 #B13FB3 #B3773F #41B33F

split-complementary

#3F7BB3 #B33F41 #B3B13F

monochromatic

#1F3D58 #2F5C86 #3F7BB3 #6699C9 #93B7D9

Accessibility & contrast

On white

4.47

#3F7BB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.70

#3F7BB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7BB3

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7BB3	#FFFFFF	#000000	##000000
##3F7BB3	1.00	4.47	4.70	4.70
#FFFFFF	4.47	1.00	21.00	21.00
#000000	4.70	21.00	1.00	1.00
##000000	4.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#637DB5

Deuteranopia (green-blind)

#5372B2

Tritanopia (blue-blind)

#00888F

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f7bb3;
/* rgb */ color: rgb(63, 123, 179);
/* oklch */ color: oklch(56.8% 0.107 248.8);

Tailwind

colors: {
  custom: {
    50: '#80a0ca',
    500: '#3f7bb3',
    950: '#000000',
  },
}

SCSS

$custom: #3f7bb3;
$custom-light: #80a0ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7bb3",
  "rgb": {
    "r": 63,
    "g": 123,
    "b": 179
  },
  "hsl": {
    "h": 208.966,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.56819,
    "c": 0.10726,
    "h": 248.8
  },
  "luminance": 0.18477
}

Semantic roles & 50–950 ramp

primary

#3F7BB3

secondary

#C4A689

accent

#9250D8

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3F7BB3

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

Preview Lab → · Contrast checker → · Palette generator →