#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
RGB	rgb(54, 87, 221)
HSL	hsl(228, 71%, 54%)
HSV	hsv(228, 76%, 87%)
CMYK	cmyk(75.6%, 60.6%, 0%, 13.3%)
CIE-LAB	lab(42.49, 34.90, -71.70)
CIE-LCH	lch(42.49, 79.74, 295.95°)
OKLab	oklab(51.76% -0.0084 -0.2072)
OKLCH	oklch(51.76% 0.207 267.7)
XYZ	xyz(17.9761, 12.8191, 69.9195)
Luminance	0.1282 (WCAG relative)
Temperature	cool
Family	blue

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
##3657DD	1.00	5.89	3.56	5.89
#FFFFFF	5.89	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.89	1.00	21.00	1.00

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.

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