#3F80B3#3F80B3

#3F80B3 is a mid, moderate cyan. Relative luminance 0.198; OKLCH L 58.0% C 0.103 H 244.7°. Best body text is #000000 at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#3F80B3
RGB	rgb(63, 128, 179)
HSL	hsl(206, 48%, 47%)
HSV	hsv(206, 65%, 70%)
CMYK	cmyk(64.8%, 28.5%, 0%, 29.8%)
CIE-LAB	lab(51.55, -4.55, -33.07)
CIE-LCH	lch(51.55, 33.38, 262.16°)
OKLab	oklab(57.99% -0.0441 -0.0932)
OKLCH	oklch(57.99% 0.103 244.7)
XYZ	xyz(17.9027, 19.7480, 45.5073)
Luminance	0.1975 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F80B3 #B3723F

analogous

#3FB3AC #3F80B3 #3F46B3

triadic

#3F80B3 #B33F80 #80B33F

tetradic

#3F80B3 #AC3FB3 #B3723F #46B33F

square

#3F80B3 #AC3FB3 #B3723F #46B33F

split-complementary

#3F80B3 #B33F46 #B3AC3F

monochromatic

#1F3F58 #2F6086 #3F80B3 #669EC9 #93BAD9

Accessibility & contrast

On white

4.24

#3F80B3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.95

#3F80B3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F80B3

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F80B3	#FFFFFF	#000000	##000000
##3F80B3	1.00	4.24	4.95	4.95
#FFFFFF	4.24	1.00	21.00	21.00
#000000	4.95	21.00	1.00	1.00
##000000	4.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6981B5

Deuteranopia (green-blind)

#5A76B2

Tritanopia (blue-blind)

#008C92

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #3f80b3;
/* rgb */ color: rgb(63, 128, 179);
/* oklch */ color: oklch(58.0% 0.103 244.7);

Tailwind

colors: {
  custom: {
    50: '#80a4ca',
    500: '#3f80b3',
    950: '#000000',
  },
}

SCSS

$custom: #3f80b3;
$custom-light: #80a4ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f80b3",
  "rgb": {
    "r": 63,
    "g": 128,
    "b": 179
  },
  "hsl": {
    "h": 206.379,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.57987,
    "c": 0.10312,
    "h": 244.7
  },
  "luminance": 0.1975
}

Semantic roles & 50–950 ramp

primary

#3F80B3

secondary

#C4A389

accent

#8C50D8

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #3F80B3

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

Preview Lab → · Contrast checker → · Palette generator →