#3757CC#3757CC

#3757CC is a mid, vivid blue. Relative luminance 0.120; OKLCH L 50.4% C 0.185 H 267.6°. Best body text is #FFFFFF at 6.18:1 contrast (WCAG AA passes).

Color values

HEX	#3757CC
RGB	rgb(55, 87, 204)
HSL	hsl(227, 59%, 51%)
HSV	hsv(227, 73%, 80%)
CMYK	cmyk(73%, 57.4%, 0%, 20%)
CIE-LAB	lab(41.19, 28.85, -64.06)
CIE-LCH	lch(41.19, 70.26, 294.24°)
OKLab	oklab(50.39% -0.0078 -0.1848)
OKLCH	oklch(50.39% 0.185 267.6)
XYZ	xyz(15.8790, 11.9866, 58.5918)
Luminance	0.1199 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757CC #CCAC37

analogous

#37A1CC #3757CC #6137CC

triadic

#3757CC #CC3757 #57CC37

tetradic

#3757CC #CC37A1 #CCAC37 #37CC61

square

#3757CC #CC37A1 #CCAC37 #37CC61

split-complementary

#3757CC #CC6137 #A1CC37

monochromatic

#1C2D6D #28419E #3757CC #6880D8 #99A9E5

Accessibility & contrast

On white

6.18

#3757CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.40

#3757CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757CC

6.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757CC	#FFFFFF	#000000	##FFFFFF
##3757CC	1.00	6.18	3.40	6.18
#FFFFFF	6.18	1.00	21.00	1.00
#000000	3.40	21.00	1.00	21.00
##FFFFFF	6.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068D0

Deuteranopia (green-blind)

#005ACA

Tritanopia (blue-blind)

#007489

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3757cc;
/* rgb */ color: rgb(55, 87, 204);
/* oklch */ color: oklch(50.4% 0.185 267.6);

Tailwind

colors: {
  custom: {
    50: '#8286dc',
    500: '#3757cc',
    950: '#000000',
  },
}

SCSS

$custom: #3757cc;
$custom-light: #8286dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3757cc",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 204
  },
  "hsl": {
    "h": 227.114,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.50391,
    "c": 0.18496,
    "h": 267.6
  },
  "luminance": 0.11988
}

Semantic roles & 50–950 ramp

primary

#3757CC

secondary

#D0C28E

accent

#C145E3

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3757CC

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

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