#3758CC#3758CC

#3758CC is a mid, vivid blue. Relative luminance 0.122; OKLCH L 50.6% C 0.184 H 267.3°. Best body text is #FFFFFF at 6.12:1 contrast (WCAG AA passes).

Color values

HEX	#3758CC
RGB	rgb(55, 88, 204)
HSL	hsl(227, 59%, 51%)
HSV	hsv(227, 73%, 80%)
CMYK	cmyk(73%, 56.9%, 0%, 20%)
CIE-LAB	lab(41.45, 28.21, -63.64)
CIE-LCH	lch(41.45, 69.62, 293.90°)
OKLab	oklab(50.59% -0.0086 -0.1835)
OKLCH	oklch(50.59% 0.184 267.3)
XYZ	xyz(15.9606, 12.1496, 58.6190)
Luminance	0.1215 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3758CC #CCAB37

analogous

#37A3CC #3758CC #6037CC

triadic

#3758CC #CC3758 #58CC37

tetradic

#3758CC #CC37A3 #CCAB37 #37CC60

square

#3758CC #CC37A3 #CCAB37 #37CC60

split-complementary

#3758CC #CC6037 #A3CC37

monochromatic

#1C2E6D #28429E #3758CC #6881D8 #99A9E5

Accessibility & contrast

On white

6.12

#3758CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.43

#3758CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3758CC

6.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3758CC	#FFFFFF	#000000	##FFFFFF
##3758CC	1.00	6.12	3.43	6.12
#FFFFFF	6.12	1.00	21.00	1.00
#000000	3.43	21.00	1.00	21.00
##FFFFFF	6.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0069D0

Deuteranopia (green-blind)

#005BCA

Tritanopia (blue-blind)

#007589

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #3758cc;
/* rgb */ color: rgb(55, 88, 204);
/* oklch */ color: oklch(50.6% 0.184 267.3);

Tailwind

colors: {
  custom: {
    50: '#8286dc',
    500: '#3758cc',
    950: '#000000',
  },
}

SCSS

$custom: #3758cc;
$custom-light: #8286dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3758cc",
  "rgb": {
    "r": 55,
    "g": 88,
    "b": 204
  },
  "hsl": {
    "h": 226.711,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.50585,
    "c": 0.18374,
    "h": 267.3
  },
  "luminance": 0.12151
}

Semantic roles & 50–950 ramp

primary

#3758CC

secondary

#D0C28E

accent

#C045E3

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3758CC

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

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