#3651BB#3651BB

#3651BB is a mid, vivid blue. Relative luminance 0.103; OKLCH L 47.8% C 0.170 H 268.4°. Best body text is #FFFFFF at 6.88:1 contrast (WCAG AA passes).

Color values

HEX	#3651BB
RGB	rgb(54, 81, 187)
HSL	hsl(228, 55%, 47%)
HSV	hsv(228, 71%, 73%)
CMYK	cmyk(71.1%, 56.7%, 0%, 26.7%)
CIE-LAB	lab(38.30, 26.39, -58.89)
CIE-LCH	lch(38.30, 64.53, 294.14°)
OKLab	oklab(47.8% -0.0048 -0.1697)
OKLCH	oklch(47.8% 0.17 268.4)
XYZ	xyz(13.4303, 10.2556, 48.2758)
Luminance	0.1026 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3651BB #BBA036

analogous

#3693BB #3651BB #5E36BB

triadic

#3651BB #BB3651 #51BB36

tetradic

#3651BB #BB3693 #BBA036 #36BB5E

square

#3651BB #BB3693 #BBA036 #36BB5E

split-complementary

#3651BB #BB5E36 #93BB36

monochromatic

#1B285C #283C8C #3651BB #5E75D0 #8D9EDE

Accessibility & contrast

On white

6.88

#3651BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.05

#3651BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3651BB

6.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3651BB	#FFFFFF	#000000	##FFFFFF
##3651BB	1.00	6.88	3.05	6.88
#FFFFFF	6.88	1.00	21.00	1.00
#000000	3.05	21.00	1.00	21.00
##FFFFFF	6.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060BF

Deuteranopia (green-blind)

#0054B9

Tritanopia (blue-blind)

#006B7E

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3651bb;
/* rgb */ color: rgb(54, 81, 187);
/* oklch */ color: oklch(47.8% 0.170 268.4);

Tailwind

colors: {
  custom: {
    50: '#7e81d0',
    500: '#3651bb',
    950: '#000000',
  },
}

SCSS

$custom: #3651bb;
$custom-light: #7e81d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3651bb",
  "rgb": {
    "r": 54,
    "g": 81,
    "b": 187
  },
  "hsl": {
    "h": 227.82,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.47803,
    "c": 0.16976,
    "h": 268.4
  },
  "luminance": 0.10257
}

Semantic roles & 50–950 ramp

primary

#3651BB

secondary

#C9BB84

accent

#C049DF

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3651BB

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

Preview Lab → · Contrast checker → · Palette generator →