#3F7BBD#3F7BBD

#3F7BBD is a mid, vivid cyan. Relative luminance 0.189; OKLCH L 57.4% C 0.120 H 252.6°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#3F7BBD
RGB	rgb(63, 123, 189)
HSL	hsl(211, 50%, 49%)
HSV	hsv(211, 67%, 74%)
CMYK	cmyk(66.7%, 34.9%, 0%, 25.9%)
CIE-LAB	lab(50.56, 1.88, -40.37)
CIE-LCH	lch(50.56, 40.41, 272.67°)
OKLab	oklab(57.37% -0.036 -0.1145)
OKLCH	oklch(57.37% 0.12 252.6)
XYZ	xyz(18.3148, 18.8949, 50.8161)
Luminance	0.1890 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7BBD #BD813F

analogous

#3FBABD #3F7BBD #423FBD

triadic

#3F7BBD #BD3F7B #7BBD3F

tetradic

#3F7BBD #BD3FBA #BD813F #3FBD42

square

#3F7BBD #BD3FBA #BD813F #3FBD42

split-complementary

#3F7BBD #BD423F #BABD3F

monochromatic

#203F61 #305D8F #3F7BBD #6B9ACE #99BADD

Accessibility & contrast

On white

4.39

#3F7BBD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#3F7BBD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7BBD

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7BBD	#FFFFFF	#000000	##000000
##3F7BBD	1.00	4.39	4.78	4.78
#FFFFFF	4.39	1.00	21.00	21.00
#000000	4.78	21.00	1.00	1.00
##000000	4.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E7FC0

Deuteranopia (green-blind)

#4C73BC

Tritanopia (blue-blind)

#008A93

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3f7bbd;
/* rgb */ color: rgb(63, 123, 189);
/* oklch */ color: oklch(57.4% 0.120 252.6);

Tailwind

colors: {
  custom: {
    50: '#81a0d1',
    500: '#3f7bbd',
    950: '#000000',
  },
}

SCSS

$custom: #3f7bbd;
$custom-light: #81a0d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7bbd",
  "rgb": {
    "r": 63,
    "g": 123,
    "b": 189
  },
  "hsl": {
    "h": 211.429,
    "s": 50,
    "l": 49.412
  },
  "oklch": {
    "l": 0.5737,
    "c": 0.12003,
    "h": 252.6
  },
  "luminance": 0.18897
}

Semantic roles & 50–950 ramp

primary

#3F7BBD

secondary

#C9AD8F

accent

#974EDA

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F7BBD

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

Preview Lab → · Contrast checker → · Palette generator →