#3757BF#3757BF

#3757BF is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.4% C 0.167 H 267.1°. Best body text is #FFFFFF at 6.41:1 contrast (WCAG AA passes).

Color values

HEX	#3757BF
RGB	rgb(55, 87, 191)
HSL	hsl(226, 55%, 48%)
HSV	hsv(226, 71%, 75%)
CMYK	cmyk(71.2%, 54.5%, 0%, 25.1%)
CIE-LAB	lab(40.23, 24.09, -58.09)
CIE-LCH	lch(40.23, 62.89, 292.53°)
OKLab	oklab(49.36% -0.0085 -0.1672)
OKLCH	oklch(49.36% 0.167 267.1)
XYZ	xyz(14.3844, 11.3887, 50.7203)
Luminance	0.1139 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757BF #BF9F37

analogous

#379BBF #3757BF #5B37BF

triadic

#3757BF #BF3757 #57BF37

tetradic

#3757BF #BF379B #BF9F37 #37BF5B

square

#3757BF #BF379B #BF9F37 #37BF5B

split-complementary

#3757BF #BF5B37 #9BBF37

monochromatic

#1C2C60 #29418F #3757BF #627CD2 #91A3DF

Accessibility & contrast

On white

6.41

#3757BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.28

#3757BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757BF

6.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757BF	#FFFFFF	#000000	##FFFFFF
##3757BF	1.00	6.41	3.28	6.41
#FFFFFF	6.41	1.00	21.00	1.00
#000000	3.28	21.00	1.00	21.00
##FFFFFF	6.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065C3

Deuteranopia (green-blind)

#0059BD

Tritanopia (blue-blind)

#007082

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3757bf;
/* rgb */ color: rgb(55, 87, 191);
/* oklch */ color: oklch(49.4% 0.167 267.1);

Tailwind

colors: {
  custom: {
    50: '#7f85d3',
    500: '#3757bf',
    950: '#000000',
  },
}

SCSS

$custom: #3757bf;
$custom-light: #7f85d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3757bf",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 191
  },
  "hsl": {
    "h": 225.882,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.4936,
    "c": 0.16746,
    "h": 267.1
  },
  "luminance": 0.1139
}

Semantic roles & 50–950 ramp

primary

#3757BF

secondary

#CABB88

accent

#BB49DF

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0B0B14

muted

#7C7C83

Preview Lab

Preview with #3757BF

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

Preview Lab → · Contrast checker → · Palette generator →