#3751CC#3751CC

#3751CC is a mid, vivid blue. Relative luminance 0.111; OKLCH L 49.3% C 0.192 H 268.9°. Best body text is #FFFFFF at 6.54:1 contrast (WCAG AA passes).

Color values

HEX	#3751CC
RGB	rgb(55, 81, 204)
HSL	hsl(230, 59%, 51%)
HSV	hsv(230, 73%, 80%)
CMYK	cmyk(73%, 60.3%, 0%, 20%)
CIE-LAB	lab(39.67, 32.69, -66.54)
CIE-LCH	lch(39.67, 74.14, 296.16°)
OKLab	oklab(49.26% -0.0035 -0.1921)
OKLCH	oklch(49.26% 0.192 268.9)
XYZ	xyz(15.4133, 11.0551, 58.4366)
Luminance	0.1106 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3751CC #CCB237

analogous

#379CCC #3751CC #6737CC

triadic

#3751CC #CC3751 #51CC37

tetradic

#3751CC #CC379C #CCB237 #37CC67

square

#3751CC #CC379C #CCB237 #37CC67

split-complementary

#3751CC #CC6737 #9CCC37

monochromatic

#1C2A6D #283D9E #3751CC #687BD8 #99A6E5

Accessibility & contrast

On white

6.54

#3751CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.21

#3751CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3751CC

6.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3751CC	#FFFFFF	#000000	##FFFFFF
##3751CC	1.00	6.54	3.21	6.54
#FFFFFF	6.54	1.00	21.00	1.00
#000000	3.21	21.00	1.00	21.00
##FFFFFF	6.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065D0

Deuteranopia (green-blind)

#0057CA

Tritanopia (blue-blind)

#007087

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3751cc;
/* rgb */ color: rgb(55, 81, 204);
/* oklch */ color: oklch(49.3% 0.192 268.9);

Tailwind

colors: {
  custom: {
    50: '#8281dc',
    500: '#3751cc',
    950: '#000000',
  },
}

SCSS

$custom: #3751cc;
$custom-light: #8281dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3751cc",
  "rgb": {
    "r": 55,
    "g": 81,
    "b": 204
  },
  "hsl": {
    "h": 229.53,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.49257,
    "c": 0.19218,
    "h": 268.9
  },
  "luminance": 0.11057
}

Semantic roles & 50–950 ramp

primary

#3751CC

secondary

#D0C58E

accent

#C745E3

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3751CC

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

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