#3757CD#3757CD

#3757CD is a mid, vivid blue. Relative luminance 0.120; OKLCH L 50.5% C 0.186 H 267.6°. Best body text is #FFFFFF at 6.16:1 contrast (WCAG AA passes).

Color values

HEX	#3757CD
RGB	rgb(55, 87, 205)
HSL	hsl(227, 60%, 51%)
HSV	hsv(227, 73%, 80%)
CMYK	cmyk(73.2%, 57.6%, 0%, 19.6%)
CIE-LAB	lab(41.27, 29.21, -64.52)
CIE-LCH	lch(41.27, 70.82, 294.36°)
OKLab	oklab(50.47% -0.0078 -0.1861)
OKLCH	oklch(50.47% 0.186 267.6)
XYZ	xyz(15.9994, 12.0347, 59.2255)
Luminance	0.1204 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757CD #CDAD37

analogous

#37A2CD #3757CD #6237CD

triadic

#3757CD #CD3757 #57CD37

tetradic

#3757CD #CD37A2 #CDAD37 #37CD62

square

#3757CD #CD37A2 #CDAD37 #37CD62

split-complementary

#3757CD #CD6237 #A2CD37

monochromatic

#1C2D6E #28419F #3757CD #6880D9 #99A9E5

Accessibility & contrast

On white

6.16

#3757CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.41

#3757CD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757CD

6.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757CD	#FFFFFF	#000000	##FFFFFF
##3757CD	1.00	6.16	3.41	6.16
#FFFFFF	6.16	1.00	21.00	1.00
#000000	3.41	21.00	1.00	21.00
##FFFFFF	6.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0069D1

Deuteranopia (green-blind)

#005BCB

Tritanopia (blue-blind)

#007489

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3757cd;
/* rgb */ color: rgb(55, 87, 205);
/* oklch */ color: oklch(50.5% 0.186 267.6);

Tailwind

colors: {
  custom: {
    50: '#8286dd',
    500: '#3757cd',
    950: '#000000',
  },
}

SCSS

$custom: #3757cd;
$custom-light: #8286dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3757cd",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 205
  },
  "hsl": {
    "h": 227.2,
    "s": 60,
    "l": 50.98
  },
  "oklch": {
    "l": 0.50473,
    "c": 0.18628,
    "h": 267.6
  },
  "luminance": 0.12036
}

Semantic roles & 50–950 ramp

primary

#3757CD

secondary

#D1C38F

accent

#C145E3

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3757CD

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

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