#3658DD#3658DD

#3658DD is a mid, highly saturated blue. Relative luminance 0.130; OKLCH L 51.9% C 0.206 H 267.5°. Best body text is #FFFFFF at 5.84:1 contrast (WCAG AA passes).

Color values

HEX	#3658DD
RGB	rgb(54, 88, 221)
HSL	hsl(228, 71%, 54%)
HSV	hsv(228, 76%, 87%)
CMYK	cmyk(75.6%, 60.2%, 0%, 13.3%)
CIE-LAB	lab(42.74, 34.26, -71.30)
CIE-LCH	lch(42.74, 79.11, 295.67°)
OKLab	oklab(51.94% -0.0091 -0.206)
OKLCH	oklch(51.94% 0.206 267.5)
XYZ	xyz(18.0576, 12.9822, 69.9467)
Luminance	0.1298 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3658DD #DDBB36

analogous

#36ACDD #3658DD #6836DD

triadic

#3658DD #DD3658 #58DD36

tetradic

#3658DD #DD36AC #DDBB36 #36DD68

square

#3658DD #DD36AC #DDBB36 #36DD68

split-complementary

#3658DD #DD6836 #ACDD36

monochromatic

#162C83 #1F3EB7 #3658DD #6A83E6 #9FAFEF

Accessibility & contrast

On white

5.84

#3658DD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.60

#3658DD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3658DD

5.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3658DD	#FFFFFF	#000000	##FFFFFF
##3658DD	1.00	5.84	3.60	5.84
#FFFFFF	5.84	1.00	21.00	1.00
#000000	3.60	21.00	1.00	21.00
##FFFFFF	5.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006DE1

Deuteranopia (green-blind)

#005DDA

Tritanopia (blue-blind)

#007A92

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3658dd;
/* rgb */ color: rgb(54, 88, 221);
/* oklch */ color: oklch(51.9% 0.206 267.5);

Tailwind

colors: {
  custom: {
    50: '#8586e9',
    500: '#3658dd',
    950: '#000000',
  },
}

SCSS

$custom: #3658dd;
$custom-light: #8586e9;
$custom-dark: #000000;

JSON

{
  "hex": "#3658dd",
  "rgb": {
    "r": 54,
    "g": 88,
    "b": 221
  },
  "hsl": {
    "h": 227.784,
    "s": 71.064,
    "l": 53.922
  },
  "oklch": {
    "l": 0.51945,
    "c": 0.20624,
    "h": 267.5
  },
  "luminance": 0.12984
}

Semantic roles & 50–950 ramp

primary

#3658DD

secondary

#DBCD94

accent

#C93AEE

background

#F9F8FE

surface

#F1EFFD

border

#CBCAD5

text

#0D0B16

muted

#7E7C84

Preview Lab

Preview with #3658DD

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

Preview Lab → · Contrast checker → · Palette generator →