#3138CF#3138CF

#3138CF is a mid, highly saturated blue. Relative luminance 0.080; OKLCH L 45.1% C 0.225 H 271.1°. Best body text is #FFFFFF at 8.09:1 contrast (WCAG AA passes).

Color values

HEX	#3138CF
RGB	rgb(49, 56, 207)
HSL	hsl(237, 62%, 50%)
HSV	hsv(237, 76%, 81%)
CMYK	cmyk(76.3%, 72.9%, 0%, 18.8%)
CIE-LAB	lab(33.95, 48.37, -77.69)
CIE-LCH	lch(33.95, 91.52, 301.91°)
OKLab	oklab(45.09% 0.0043 -0.2249)
OKLCH	oklch(45.09% 0.225 271.1)
XYZ	xyz(13.9395, 7.9848, 59.8260)
Luminance	0.0799 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 3.44

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3138CF #CFC831

analogous

#3187CF #3138CF #7931CF

triadic

#3138CF #CF3138 #38CF31

tetradic

#3138CF #CF3187 #CFC831 #31CF79

square

#3138CF #CF3187 #CFC831 #31CF79

split-complementary

#3138CF #CF7931 #87CF31

monochromatic

#191D6C #252A9E #3138CF #6368DB #9498E6

Accessibility & contrast

On white

8.09

#3138CF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#3138CF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3138CF

8.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3138CF	#FFFFFF	#000000	##FFFFFF
##3138CF	1.00	8.09	2.60	8.09
#FFFFFF	8.09	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058D3

Deuteranopia (green-blind)

#0048CC

Tritanopia (blue-blind)

#006480

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3138cf;
/* rgb */ color: rgb(49, 56, 207);
/* oklch */ color: oklch(45.1% 0.225 271.1);

Tailwind

colors: {
  custom: {
    50: '#8370df',
    500: '#3138cf',
    950: '#000000',
  },
}

SCSS

$custom: #3138cf;
$custom-light: #8370df;
$custom-dark: #000000;

JSON

{
  "hex": "#3138cf",
  "rgb": {
    "r": 49,
    "g": 56,
    "b": 207
  },
  "hsl": {
    "h": 237.342,
    "s": 62.205,
    "l": 50.196
  },
  "oklch": {
    "l": 0.45092,
    "c": 0.22497,
    "h": 271.1
  },
  "luminance": 0.07986
}

Semantic roles & 50–950 ramp

primary

#3138CF

secondary

#D1CE8B

accent

#DE43E5

background

#F8F6FD

surface

#F0ECFB

border

#CBC7D4

text

#0D0715

muted

#7D7A83

Preview Lab

Preview with #3138CF

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

Preview Lab → · Contrast checker → · Palette generator →