#3721BD#3721BD

#3721BD is a dark, highly saturated blue. Relative luminance 0.056; OKLCH L 40.7% C 0.222 H 276.3°. Best body text is #FFFFFF at 9.93:1 contrast (WCAG AA passes).

Color values

HEX	#3721BD
RGB	rgb(55, 33, 189)
HSL	hsl(248, 70%, 44%)
HSV	hsv(248, 83%, 74%)
CMYK	cmyk(70.9%, 82.5%, 0%, 25.9%)
CIE-LAB	lab(28.31, 54.88, -76.47)
CIE-LCH	lch(28.31, 94.13, 305.67°)
OKLab	oklab(40.66% 0.0245 -0.221)
OKLCH	oklch(40.66% 0.222 276.3)
XYZ	xyz(11.3017, 5.5730, 48.6143)
Luminance	0.0557 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3721BD #A7BD21

analogous

#2159BD #3721BD #8521BD

triadic

#3721BD #BD3721 #21BD37

tetradic

#3721BD #BD2159 #A7BD21 #21BD85

square

#3721BD #BD2159 #A7BD21 #21BD85

split-complementary

#3721BD #BD8521 #59BD21

monochromatic

#190F55 #281889 #3721BD #543EDD #8272E6

Accessibility & contrast

On white

9.93

#3721BD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#3721BD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3721BD

9.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3721BD	#FFFFFF	#000000	##FFFFFF
##3721BD	1.00	9.93	2.11	9.93
#FFFFFF	9.93	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049C1

Deuteranopia (green-blind)

#003CBA

Tritanopia (blue-blind)

#005371

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #3721bd;
/* rgb */ color: rgb(55, 33, 189);
/* oklch */ color: oklch(40.7% 0.222 276.3);

Tailwind

colors: {
  custom: {
    50: '#8362d2',
    500: '#3721bd',
    950: '#000000',
  },
}

SCSS

$custom: #3721bd;
$custom-light: #8362d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3721bd",
  "rgb": {
    "r": 55,
    "g": 33,
    "b": 189
  },
  "hsl": {
    "h": 248.462,
    "s": 70.27,
    "l": 43.529
  },
  "oklch": {
    "l": 0.4066,
    "c": 0.22234,
    "h": 276.3
  },
  "luminance": 0.05574
}

Semantic roles & 50–950 ramp

primary

#3721BD

secondary

#C0CD6D

accent

#ED3BD4

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0D0514

muted

#7D7A83

Preview Lab

Preview with #3721BD

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

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