#3D66CB#3D66CB

#3D66CB is a mid, vivid blue. Relative luminance 0.148; OKLCH L 53.6% C 0.164 H 264.8°. Best body text is #FFFFFF at 5.30:1 contrast (WCAG AA passes).

Color values

HEX	#3D66CB
RGB	rgb(61, 102, 203)
HSL	hsl(223, 58%, 52%)
HSV	hsv(223, 70%, 80%)
CMYK	cmyk(70%, 49.8%, 0%, 20.4%)
CIE-LAB	lab(45.37, 19.68, -56.72)
CIE-LCH	lch(45.37, 60.04, 289.13°)
OKLab	oklab(53.59% -0.0148 -0.1628)
OKLCH	oklch(53.59% 0.164 264.8)
XYZ	xyz(17.4515, 14.8049, 58.4262)
Luminance	0.1481 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3D66CB #CBA23D

analogous

#3DADCB #3D66CB #5B3DCB

triadic

#3D66CB #CB3D66 #66CB3D

tetradic

#3D66CB #CB3DAD #CBA23D #3DCB5B

square

#3D66CB #CB3DAD #CBA23D #3DCB5B

split-complementary

#3D66CB #CB5B3D #ADCB3D

monochromatic

#1E3670 #2B4DA0 #3D66CB #6D8CD8 #9EB2E5

Accessibility & contrast

On white

5.30

#3D66CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.96

#3D66CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3D66CB

5.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3D66CB	#FFFFFF	#000000	##FFFFFF
##3D66CB	1.00	5.30	3.96	5.30
#FFFFFF	5.30	1.00	21.00	1.00
#000000	3.96	21.00	1.00	21.00
##FFFFFF	5.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B72CF

Deuteranopia (green-blind)

#0065C9

Tritanopia (blue-blind)

#007E8F

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3d66cb;
/* rgb */ color: rgb(61, 102, 203);
/* oklch */ color: oklch(53.6% 0.164 264.8);

Tailwind

colors: {
  custom: {
    50: '#8391db',
    500: '#3d66cb',
    950: '#000000',
  },
}

SCSS

$custom: #3d66cb;
$custom-light: #8391db;
$custom-dark: #000000;

JSON

{
  "hex": "#3d66cb",
  "rgb": {
    "r": 61,
    "g": 102,
    "b": 203
  },
  "hsl": {
    "h": 222.676,
    "s": 57.724,
    "l": 51.765
  },
  "oklch": {
    "l": 0.53593,
    "c": 0.16351,
    "h": 264.8
  },
  "luminance": 0.14807
}

Semantic roles & 50–950 ramp

primary

#3D66CB

secondary

#D1BF93

accent

#B447E1

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3D66CB

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

Preview Lab → · Contrast checker → · Palette generator →