#3750BB#3750BB

#3750BB is a mid, vivid blue. Relative luminance 0.101; OKLCH L 47.7% C 0.171 H 269.0°. Best body text is #FFFFFF at 6.94:1 contrast (WCAG AA passes).

Color values

HEX	#3750BB
RGB	rgb(55, 80, 187)
HSL	hsl(229, 55%, 47%)
HSV	hsv(229, 71%, 73%)
CMYK	cmyk(70.6%, 57.2%, 0%, 26.7%)
CIE-LAB	lab(38.09, 27.17, -59.23)
CIE-LCH	lch(38.09, 65.17, 294.64°)
OKLab	oklab(47.66% -0.003 -0.1707)
OKLCH	oklch(47.66% 0.171 269)
XYZ	xyz(13.4108, 10.1361, 48.2538)
Luminance	0.1014 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3750BB #BBA237

analogous

#3792BB #3750BB #6037BB

triadic

#3750BB #BB3750 #50BB37

tetradic

#3750BB #BB3792 #BBA237 #37BB60

square

#3750BB #BB3792 #BBA237 #37BB60

split-complementary

#3750BB #BB6037 #92BB37

monochromatic

#1B285C #293C8C #3750BB #5F75D0 #8E9EDE

Accessibility & contrast

On white

6.94

#3750BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.03

#3750BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3750BB

6.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3750BB	#FFFFFF	#000000	##FFFFFF
##3750BB	1.00	6.94	3.03	6.94
#FFFFFF	6.94	1.00	21.00	1.00
#000000	3.03	21.00	1.00	21.00
##FFFFFF	6.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060BF

Deuteranopia (green-blind)

#0054B9

Tritanopia (blue-blind)

#006A7D

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3750bb;
/* rgb */ color: rgb(55, 80, 187);
/* oklch */ color: oklch(47.7% 0.171 269.0);

Tailwind

colors: {
  custom: {
    50: '#7f80d0',
    500: '#3750bb',
    950: '#000000',
  },
}

SCSS

$custom: #3750bb;
$custom-light: #7f80d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3750bb",
  "rgb": {
    "r": 55,
    "g": 80,
    "b": 187
  },
  "hsl": {
    "h": 228.636,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.47658,
    "c": 0.17072,
    "h": 269
  },
  "luminance": 0.10137
}

Semantic roles & 50–950 ramp

primary

#3750BB

secondary

#C9BC85

accent

#C24ADE

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3750BB

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

Preview Lab → · Contrast checker → · Palette generator →