#3873CA#3873CA

#3873CA is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.1% C 0.148 H 258.2°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3873CA
RGB	rgb(56, 115, 202)
HSL	hsl(216, 58%, 51%)
HSV	hsv(216, 72%, 79%)
CMYK	cmyk(72.3%, 43.1%, 0%, 20.8%)
CIE-LAB	lab(48.72, 10.39, -50.78)
CIE-LCH	lch(48.72, 51.83, 281.57°)
OKLab	oklab(56.09% -0.0303 -0.1452)
OKLCH	oklch(56.09% 0.148 258.2)
XYZ	xyz(18.4184, 17.3645, 58.2466)
Luminance	0.1737 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3873CA #CA8F38

analogous

#38BCCA #3873CA #4638CA

triadic

#3873CA #CA3873 #73CA38

tetradic

#3873CA #CA38BC #CA8F38 #38CA46

square

#3873CA #CA38BC #CA8F38 #38CA46

split-complementary

#3873CA #CA4638 #BCCA38

monochromatic

#1D3C6B #29579B #3873CA #6895D7 #99B7E4

Accessibility & contrast

On white

4.69

#3873CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#3873CA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3873CA

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3873CA	#FFFFFF	#000000	##FFFFFF
##3873CA	1.00	4.69	4.47	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#487BCD

Deuteranopia (green-blind)

#2E6DC8

Tritanopia (blue-blind)

#008794

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3873ca;
/* rgb */ color: rgb(56, 115, 202);
/* oklch */ color: oklch(56.1% 0.148 258.2);

Tailwind

colors: {
  custom: {
    50: '#819adb',
    500: '#3873ca',
    950: '#000000',
  },
}

SCSS

$custom: #3873ca;
$custom-light: #819adb;
$custom-dark: #000000;

JSON

{
  "hex": "#3873ca",
  "rgb": {
    "r": 56,
    "g": 115,
    "b": 202
  },
  "hsl": {
    "h": 215.753,
    "s": 57.937,
    "l": 50.588
  },
  "oklch": {
    "l": 0.56091,
    "c": 0.14835,
    "h": 258.2
  },
  "luminance": 0.17366
}

Semantic roles & 50–950 ramp

primary

#3873CA

secondary

#CFB58E

accent

#A347E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3873CA

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

Preview Lab → · Contrast checker → · Palette generator →