#3661DD#3661DD

#3661DD is a mid, vivid blue. Relative luminance 0.146; OKLCH L 53.6% C 0.196 H 265.6°. Best body text is #FFFFFF at 5.37:1 contrast (WCAG AA passes).

Color values

HEX	#3661DD
RGB	rgb(54, 97, 221)
HSL	hsl(225, 71%, 54%)
HSV	hsv(225, 76%, 87%)
CMYK	cmyk(75.6%, 56.1%, 0%, 13.3%)
CIE-LAB	lab(45.01, 28.55, -67.59)
CIE-LCH	lch(45.01, 73.37, 292.90°)
OKLab	oklab(53.65% -0.015 -0.195)
OKLCH	oklch(53.65% 0.196 265.6)
XYZ	xyz(18.8426, 14.5520, 70.2083)
Luminance	0.1455 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3661DD #DDB236

analogous

#36B5DD #3661DD #5F36DD

triadic

#3661DD #DD3661 #61DD36

tetradic

#3661DD #DD36B5 #DDB236 #36DD5F

square

#3661DD #DD36B5 #DDB236 #36DD5F

split-complementary

#3661DD #DD5F36 #B5DD36

monochromatic

#163283 #1F46B7 #3661DD #6A8AE6 #9FB3EF

Accessibility & contrast

On white

5.37

#3661DD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.91

#3661DD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3661DD

5.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3661DD	#FFFFFF	#000000	##FFFFFF
##3661DD	1.00	5.37	3.91	5.37
#FFFFFF	5.37	1.00	21.00	1.00
#000000	3.91	21.00	1.00	21.00
##FFFFFF	5.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0073E1

Deuteranopia (green-blind)

#0063DB

Tritanopia (blue-blind)

#008095

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3661dd;
/* rgb */ color: rgb(54, 97, 221);
/* oklch */ color: oklch(53.6% 0.196 265.6);

Tailwind

colors: {
  custom: {
    50: '#858de8',
    500: '#3661dd',
    950: '#000000',
  },
}

SCSS

$custom: #3661dd;
$custom-light: #858de8;
$custom-dark: #000000;

JSON

{
  "hex": "#3661dd",
  "rgb": {
    "r": 54,
    "g": 97,
    "b": 221
  },
  "hsl": {
    "h": 224.551,
    "s": 71.064,
    "l": 53.922
  },
  "oklch": {
    "l": 0.53647,
    "c": 0.1956,
    "h": 265.6
  },
  "luminance": 0.14554
}

Semantic roles & 50–950 ramp

primary

#3661DD

secondary

#DBC994

accent

#C03AEE

background

#F9F8FE

surface

#F1F0FD

border

#CBCBD5

text

#0D0C16

muted

#7E7D84

Preview Lab

Preview with #3661DD

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

Preview Lab → · Contrast checker → · Palette generator →