#3745B3#3745B3

#3745B3 is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.9% C 0.174 H 271.8°. Best body text is #FFFFFF at 7.88:1 contrast (WCAG AA passes).

Color values

HEX	#3745B3
RGB	rgb(55, 69, 179)
HSL	hsl(233, 53%, 46%)
HSV	hsv(233, 69%, 70%)
CMYK	cmyk(69.3%, 61.5%, 0%, 29.8%)
CIE-LAB	lab(34.64, 31.40, -60.12)
CIE-LCH	lch(34.64, 67.83, 297.58°)
OKLab	oklab(44.9% 0.0056 -0.1734)
OKLCH	oklch(44.9% 0.174 271.8)
XYZ	xyz(11.8376, 8.3220, 43.6215)
Luminance	0.0832 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3745B3 #B3A537

analogous

#3783B3 #3745B3 #6737B3

triadic

#3745B3 #B33745 #45B337

tetradic

#3745B3 #B33783 #B3A537 #37B367

square

#3745B3 #B33783 #B3A537 #37B367

split-complementary

#3745B3 #B36737 #83B337

monochromatic

#1A2155 #293384 #3745B3 #5B68CD #8A93DB

Accessibility & contrast

On white

7.88

#3745B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#3745B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3745B3

7.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3745B3	#FFFFFF	#000000	##FFFFFF
##3745B3	1.00	7.88	2.66	7.88
#FFFFFF	7.88	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057B7

Deuteranopia (green-blind)

#004CB1

Tritanopia (blue-blind)

#006175

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3745b3;
/* rgb */ color: rgb(55, 69, 179);
/* oklch */ color: oklch(44.9% 0.174 271.8);

Tailwind

colors: {
  custom: {
    50: '#7e78cb',
    500: '#3745b3',
    950: '#000000',
  },
}

SCSS

$custom: #3745b3;
$custom-light: #7e78cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3745b3",
  "rgb": {
    "r": 55,
    "g": 69,
    "b": 179
  },
  "hsl": {
    "h": 233.226,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.44901,
    "c": 0.17351,
    "h": 271.8
  },
  "luminance": 0.08323
}

Semantic roles & 50–950 ramp

primary

#3745B3

secondary

#C5BD81

accent

#CC4BDC

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3745B3

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

Preview Lab → · Contrast checker → · Palette generator →