#3758B0#3758B0

#3758B0 is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.4% C 0.145 H 265.7°. Best body text is #FFFFFF at 6.59:1 contrast (WCAG AA passes).

Color values

HEX	#3758B0
RGB	rgb(55, 88, 176)
HSL	hsl(224, 52%, 45%)
HSV	hsv(224, 69%, 69%)
CMYK	cmyk(68.8%, 50%, 0%, 31%)
CIE-LAB	lab(39.45, 17.92, -50.55)
CIE-LCH	lch(39.45, 53.63, 289.52°)
OKLab	oklab(48.44% -0.0108 -0.145)
OKLCH	oklch(48.44% 0.145 265.7)
XYZ	xyz(12.8990, 10.9250, 42.4948)
Luminance	0.1093 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3758B0 #B08F37

analogous

#3795B0 #3758B0 #5237B0

triadic

#3758B0 #B03758 #58B037

tetradic

#3758B0 #B03795 #B08F37 #37B052

square

#3758B0 #B03795 #B08F37 #37B052

split-complementary

#3758B0 #B05237 #95B037

monochromatic

#1A2953 #284181 #3758B0 #5978CB #889EDA

Accessibility & contrast

On white

6.59

#3758B0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#3758B0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3758B0

6.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3758B0	#FFFFFF	#000000	##FFFFFF
##3758B0	1.00	6.59	3.19	6.59
#FFFFFF	6.59	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2663B3

Deuteranopia (green-blind)

#0058AE

Tritanopia (blue-blind)

#006D7B

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3758b0;
/* rgb */ color: rgb(55, 88, 176);
/* oklch */ color: oklch(48.4% 0.145 265.7);

Tailwind

colors: {
  custom: {
    50: '#7c86c8',
    500: '#3758b0',
    950: '#000000',
  },
}

SCSS

$custom: #3758b0;
$custom-light: #7c86c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3758b0",
  "rgb": {
    "r": 55,
    "g": 88,
    "b": 176
  },
  "hsl": {
    "h": 223.636,
    "s": 52.381,
    "l": 45.294
  },
  "oklch": {
    "l": 0.48441,
    "c": 0.14542,
    "h": 265.7
  },
  "luminance": 0.10926
}

Semantic roles & 50–950 ramp

primary

#3758B0

secondary

#C4B17F

accent

#B54CDC

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3758B0

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

Preview Lab → · Contrast checker → · Palette generator →