#3657DD#3657DD

#3657DD is a mid, highly saturated blue. Relative luminance 0.128; OKLCH L 51.8% C 0.207 H 267.7°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX#3657DD
RGBrgb(54, 87, 221)
HSLhsl(228, 71%, 54%)
HSVhsv(228, 76%, 87%)
CMYKcmyk(75.6%, 60.6%, 0%, 13.3%)
CIE-LABlab(42.49, 34.90, -71.70)
CIE-LCHlch(42.49, 79.74, 295.95°)
OKLaboklab(51.76% -0.0084 -0.2072)
OKLCHoklch(51.76% 0.207 267.7)
XYZxyz(17.9761, 12.8191, 69.9195)
Luminance0.1282 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3657DD #DDBC36
analogous
#36ABDD #3657DD #6936DD
triadic
#3657DD #DD3657 #57DD36
tetradic
#3657DD #DD36AB #DDBC36 #36DD69
square
#3657DD #DD36AB #DDBC36 #36DD69
split-complementary
#3657DD #DD6936 #ABDD36
monochromatic
#162C83 #1F3DB7 #3657DD #6A83E6 #9FAFEF

Accessibility & contrast

On white

5.89
#3657DD on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.56
#3657DD on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3657DD
5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3657DD#FFFFFF#000000##FFFFFF
##3657DD1.005.893.565.89
#FFFFFF5.891.0021.001.00
#0000003.5621.001.0021.00
##FFFFFF5.891.0021.001.00

Color blindness preview

Protanopia (red-blind)
#006CE1
Deuteranopia (green-blind)
#005DDA
Tritanopia (blue-blind)
#007992
Achromatopsia (no color)
#646464

Design tokens & code

CSS
--color: #3657dd;
/* rgb */ color: rgb(54, 87, 221);
/* oklch */ color: oklch(51.8% 0.207 267.7);
Tailwind
colors: {
  custom: {
    50: '#8586e9',
    500: '#3657dd',
    950: '#000000',
  },
}
SCSS
$custom: #3657dd;
$custom-light: #8586e9;
$custom-dark: #000000;
JSON
{
  "hex": "#3657dd",
  "rgb": {
    "r": 54,
    "g": 87,
    "b": 221
  },
  "hsl": {
    "h": 228.144,
    "s": 71.064,
    "l": 53.922
  },
  "oklch": {
    "l": 0.51761,
    "c": 0.20741,
    "h": 267.7
  },
  "luminance": 0.12821
}

Semantic roles & 50–950 ramp

primary
#3657DD
secondary
#DBCD94
accent
#CA3AEE
background
#F9F8FE
surface
#F1EFFD
border
#CBCAD5
text
#0D0B16
muted
#7E7C84

Preview Lab

Preview with #3657DD

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

Preview Lab → · Contrast checker → · Palette generator →

#3657DD Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva