#3B66D0#3B66D0

#3B66D0 is a mid, vivid blue. Relative luminance 0.150; OKLCH L 53.9% C 0.171 H 264.7°. Best body text is #FFFFFF at 5.25:1 contrast (WCAG AA passes).

Color values

HEX	#3B66D0
RGB	rgb(59, 102, 208)
HSL	hsl(223, 61%, 52%)
HSV	hsv(223, 72%, 82%)
CMYK	cmyk(71.6%, 51%, 0%, 18.4%)
CIE-LAB	lab(45.61, 21.22, -59.19)
CIE-LCH	lch(45.61, 62.88, 289.72°)
OKLab	oklab(53.86% -0.0159 -0.1701)
OKLCH	oklch(53.86% 0.171 264.7)
XYZ	xyz(17.9362, 14.9847, 61.6094)
Luminance	0.1499 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B66D0 #D0A53B

analogous

#3BB0D0 #3B66D0 #5B3BD0

triadic

#3B66D0 #D03B66 #66D03B

tetradic

#3B66D0 #D03BB0 #D0A53B #3BD05B

square

#3B66D0 #D03BB0 #D0A53B #3BD05B

split-complementary

#3B66D0 #D05B3B #B0D03B

monochromatic

#1C3675 #284CA6 #3B66D0 #6C8DDC #9EB3E8

Accessibility & contrast

On white

5.25

#3B66D0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.00

#3B66D0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B66D0

5.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B66D0	#FFFFFF	#000000	##FFFFFF
##3B66D0	1.00	5.25	4.00	5.25
#FFFFFF	5.25	1.00	21.00	1.00
#000000	4.00	21.00	1.00	21.00
##FFFFFF	5.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2473D4

Deuteranopia (green-blind)

#0066CE

Tritanopia (blue-blind)

#007F91

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #3b66d0;
/* rgb */ color: rgb(59, 102, 208);
/* oklch */ color: oklch(53.9% 0.171 264.7);

Tailwind

colors: {
  custom: {
    50: '#8391df',
    500: '#3b66d0',
    950: '#000000',
  },
}

SCSS

$custom: #3b66d0;
$custom-light: #8391df;
$custom-dark: #000000;

JSON

{
  "hex": "#3b66d0",
  "rgb": {
    "r": 59,
    "g": 102,
    "b": 208
  },
  "hsl": {
    "h": 222.685,
    "s": 61.317,
    "l": 52.353
  },
  "oklch": {
    "l": 0.53864,
    "c": 0.17089,
    "h": 264.7
  },
  "luminance": 0.14987
}

Semantic roles & 50–950 ramp

primary

#3B66D0

secondary

#D4C193

accent

#B643E4

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3B66D0

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

Preview Lab → · Contrast checker → · Palette generator →