#3657B9#3657B9

#3657B9 is a mid, vivid blue. Relative luminance 0.111; OKLCH L 48.9% C 0.160 H 266.5°. Best body text is #FFFFFF at 6.52:1 contrast (WCAG AA passes).

Color values

HEX	#3657B9
RGB	rgb(54, 87, 185)
HSL	hsl(225, 55%, 47%)
HSV	hsv(225, 71%, 73%)
CMYK	cmyk(70.8%, 53%, 0%, 27.5%)
CIE-LAB	lab(39.75, 21.74, -55.36)
CIE-LCH	lch(39.75, 59.48, 291.44°)
OKLab	oklab(48.85% -0.0098 -0.1592)
OKLCH	oklch(48.85% 0.16 266.5)
XYZ	xyz(13.6834, 11.1020, 47.3113)
Luminance	0.1110 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3657B9 #B99836

analogous

#3699B9 #3657B9 #5636B9

triadic

#3657B9 #B93657 #57B936

tetradic

#3657B9 #B93699 #B99836 #36B956

square

#3657B9 #B93699 #B99836 #36B956

split-complementary

#3657B9 #B95636 #99B936

monochromatic

#1A2A5A #28418A #3657B9 #5D7AD0 #8CA0DD

Accessibility & contrast

On white

6.52

#3657B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.22

#3657B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3657B9

6.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3657B9	#FFFFFF	#000000	##FFFFFF
##3657B9	1.00	6.52	3.22	6.52
#FFFFFF	6.52	1.00	21.00	1.00
#000000	3.22	21.00	1.00	21.00
##FFFFFF	6.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1364BC

Deuteranopia (green-blind)

#0058B7

Tritanopia (blue-blind)

#006E7F

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3657b9;
/* rgb */ color: rgb(54, 87, 185);
/* oklch */ color: oklch(48.9% 0.160 266.5);

Tailwind

colors: {
  custom: {
    50: '#7d85cf',
    500: '#3657b9',
    950: '#000000',
  },
}

SCSS

$custom: #3657b9;
$custom-light: #7d85cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3657b9",
  "rgb": {
    "r": 54,
    "g": 87,
    "b": 185
  },
  "hsl": {
    "h": 224.885,
    "s": 54.812,
    "l": 46.863
  },
  "oklch": {
    "l": 0.48852,
    "c": 0.15951,
    "h": 266.5
  },
  "luminance": 0.11103
}

Semantic roles & 50–950 ramp

primary

#3657B9

secondary

#C8B683

accent

#B94ADE

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3657B9

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

Preview Lab → · Contrast checker → · Palette generator →