#3645B3#3645B3

#3645B3 is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.8% C 0.174 H 271.5°. Best body text is #FFFFFF at 7.90:1 contrast (WCAG AA passes).

Color values

HEX	#3645B3
RGB	rgb(54, 69, 179)
HSL	hsl(233, 54%, 46%)
HSV	hsv(233, 70%, 70%)
CMYK	cmyk(69.8%, 61.5%, 0%, 29.8%)
CIE-LAB	lab(34.59, 31.26, -60.22)
CIE-LCH	lch(34.59, 67.85, 297.44°)
OKLab	oklab(44.84% 0.0045 -0.1737)
OKLCH	oklch(44.84% 0.174 271.5)
XYZ	xyz(11.7834, 8.2940, 43.6190)
Luminance	0.0829 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3645B3 #B3A436

analogous

#3683B3 #3645B3 #6536B3

triadic

#3645B3 #B33645 #45B336

tetradic

#3645B3 #B33683 #B3A436 #36B365

square

#3645B3 #B33683 #B3A436 #36B365

split-complementary

#3645B3 #B36536 #83B336

monochromatic

#1A2155 #283384 #3645B3 #5967CD #8892DB

Accessibility & contrast

On white

7.90

#3645B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#3645B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3645B3

7.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3645B3	#FFFFFF	#000000	##FFFFFF
##3645B3	1.00	7.90	2.66	7.90
#FFFFFF	7.90	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.90	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: #3645b3;
/* rgb */ color: rgb(54, 69, 179);
/* oklch */ color: oklch(44.8% 0.174 271.5);

Tailwind

colors: {
  custom: {
    50: '#7d78cb',
    500: '#3645b3',
    950: '#000000',
  },
}

SCSS

$custom: #3645b3;
$custom-light: #7d78cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3645b3",
  "rgb": {
    "r": 54,
    "g": 69,
    "b": 179
  },
  "hsl": {
    "h": 232.8,
    "s": 53.648,
    "l": 45.686
  },
  "oklch": {
    "l": 0.44844,
    "c": 0.17379,
    "h": 271.5
  },
  "luminance": 0.08295
}

Semantic roles & 50–950 ramp

primary

#3645B3

secondary

#C5BD80

accent

#CB4BDD

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3645B3

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

Preview Lab → · Contrast checker → · Palette generator →