#3657CD#3657CD

#3657CD is a mid, vivid blue. Relative luminance 0.120; OKLCH L 50.4% C 0.187 H 267.3°. Best body text is #FFFFFF at 6.17:1 contrast (WCAG AA passes).

Color values

HEX	#3657CD
RGB	rgb(54, 87, 205)
HSL	hsl(227, 60%, 51%)
HSV	hsv(227, 74%, 80%)
CMYK	cmyk(73.7%, 57.6%, 0%, 19.6%)
CIE-LAB	lab(41.23, 29.09, -64.59)
CIE-LCH	lch(41.23, 70.84, 294.25°)
OKLab	oklab(50.43% -0.0087 -0.1864)
OKLCH	oklch(50.43% 0.187 267.3)
XYZ	xyz(15.9451, 12.0067, 59.2230)
Luminance	0.1201 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3657CD #CDAC36

analogous

#36A3CD #3657CD #6036CD

triadic

#3657CD #CD3657 #57CD36

tetradic

#3657CD #CD36A3 #CDAC36 #36CD60

square

#3657CD #CD36A3 #CDAC36 #36CD60

split-complementary

#3657CD #CD6036 #A3CD36

monochromatic

#1B2D6D #27419E #3657CD #6780D9 #98A9E5

Accessibility & contrast

On white

6.17

#3657CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.40

#3657CD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3657CD

6.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3657CD	#FFFFFF	#000000	##FFFFFF
##3657CD	1.00	6.17	3.40	6.17
#FFFFFF	6.17	1.00	21.00	1.00
#000000	3.40	21.00	1.00	21.00
##FFFFFF	6.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068D1

Deuteranopia (green-blind)

#005ACB

Tritanopia (blue-blind)

#007489

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3657cd;
/* rgb */ color: rgb(54, 87, 205);
/* oklch */ color: oklch(50.4% 0.187 267.3);

Tailwind

colors: {
  custom: {
    50: '#8286dd',
    500: '#3657cd',
    950: '#000000',
  },
}

SCSS

$custom: #3657cd;
$custom-light: #8286dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3657cd",
  "rgb": {
    "r": 54,
    "g": 87,
    "b": 205
  },
  "hsl": {
    "h": 226.887,
    "s": 60.159,
    "l": 50.784
  },
  "oklch": {
    "l": 0.50427,
    "c": 0.18656,
    "h": 267.3
  },
  "luminance": 0.12008
}

Semantic roles & 50–950 ramp

primary

#3657CD

secondary

#D1C28E

accent

#C144E3

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3657CD

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

Preview Lab → · Contrast checker → · Palette generator →