#3866BF#3866BF

#3866BF is a mid, vivid blue. Relative luminance 0.141; OKLCH L 52.5% C 0.149 H 262.0°. Best body text is #FFFFFF at 5.50:1 contrast (WCAG AA passes).

Color values

HEX	#3866BF
RGB	rgb(56, 102, 191)
HSL	hsl(220, 55%, 48%)
HSV	hsv(220, 71%, 75%)
CMYK	cmyk(70.7%, 46.6%, 0%, 25.1%)
CIE-LAB	lab(44.38, 14.56, -51.39)
CIE-LCH	lch(44.38, 53.41, 285.82°)
OKLab	oklab(52.53% -0.0206 -0.1472)
OKLCH	oklch(52.53% 0.149 262)
XYZ	xyz(15.7829, 14.1034, 51.1706)
Luminance	0.1411 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3866BF #BF9138

analogous

#38A9BF #3866BF #4E38BF

triadic

#3866BF #BF3866 #66BF38

tetradic

#3866BF #BF38A9 #BF9138 #38BF4E

square

#3866BF #BF38A9 #BF9138 #38BF4E

split-complementary

#3866BF #BF4E38 #A9BF38

monochromatic

#1C3360 #2A4D90 #3866BF #6389D1 #92ACDF

Accessibility & contrast

On white

5.50

#3866BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.82

#3866BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3866BF

5.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3866BF	#FFFFFF	#000000	##FFFFFF
##3866BF	1.00	5.50	3.82	5.50
#FFFFFF	5.50	1.00	21.00	1.00
#000000	3.82	21.00	1.00	21.00
##FFFFFF	5.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3870C2

Deuteranopia (green-blind)

#1A63BD

Tritanopia (blue-blind)

#007B89

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3866bf;
/* rgb */ color: rgb(56, 102, 191);
/* oklch */ color: oklch(52.5% 0.149 262.0);

Tailwind

colors: {
  custom: {
    50: '#7f91d3',
    500: '#3866bf',
    950: '#000000',
  },
}

SCSS

$custom: #3866bf;
$custom-light: #7f91d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3866bf",
  "rgb": {
    "r": 56,
    "g": 102,
    "b": 191
  },
  "hsl": {
    "h": 219.556,
    "s": 54.656,
    "l": 48.431
  },
  "oklch": {
    "l": 0.52534,
    "c": 0.14868,
    "h": 262
  },
  "luminance": 0.14105
}

Semantic roles & 50–950 ramp

primary

#3866BF

secondary

#CAB489

accent

#AC4ADE

background

#F8F8FD

surface

#EFF0FA

border

#CACBD3

text

#0B0C14

muted

#7C7D83

Preview Lab

Preview with #3866BF

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

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