#3F7CDB#3F7CDB

#3F7CDB is a mid, vivid blue. Relative luminance 0.206; OKLCH L 59.4% C 0.158 H 259.0°. Best body text is #000000 at 5.12:1 contrast (WCAG AA passes).

Color values

HEX	#3F7CDB
RGB	rgb(63, 124, 219)
HSL	hsl(217, 68%, 55%)
HSV	hsv(217, 71%, 86%)
CMYK	cmyk(71.2%, 43.4%, 0%, 14.1%)
CIE-LAB	lab(52.49, 11.96, -54.37)
CIE-LCH	lch(52.49, 55.67, 282.40°)
OKLab	oklab(59.4% -0.0301 -0.1555)
OKLCH	oklch(59.4% 0.158 259)
XYZ	xyz(22.0391, 20.5842, 69.8157)
Luminance	0.2059 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7CDB #DB9E3F

analogous

#3FCADB #3F7CDB #503FDB

triadic

#3F7CDB #DB3F7C #7CDB3F

tetradic

#3F7CDB #DB3FCA #DB9E3F #3FDB50

square

#3F7CDB #DB3FCA #DB9E3F #3FDB50

split-complementary

#3F7CDB #DB503F #CADB3F

monochromatic

#194486 #235EBA #3F7CDB #739FE5 #A6C2EE

Accessibility & contrast

On white

4.10

#3F7CDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.12

#3F7CDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7CDB

5.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7CDB	#FFFFFF	#000000	##000000
##3F7CDB	1.00	4.10	5.12	5.12
#FFFFFF	4.10	1.00	21.00	21.00
#000000	5.12	21.00	1.00	1.00
##000000	5.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D85DF

Deuteranopia (green-blind)

#3177D9

Tritanopia (blue-blind)

#0092A1

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #3f7cdb;
/* rgb */ color: rgb(63, 124, 219);
/* oklch */ color: oklch(59.4% 0.158 259.0);

Tailwind

colors: {
  custom: {
    50: '#86a1e7',
    500: '#3f7cdb',
    950: '#000000',
  },
}

SCSS

$custom: #3f7cdb;
$custom-light: #86a1e7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7cdb",
  "rgb": {
    "r": 63,
    "g": 124,
    "b": 219
  },
  "hsl": {
    "h": 216.538,
    "s": 68.421,
    "l": 55.294
  },
  "oklch": {
    "l": 0.59403,
    "c": 0.15844,
    "h": 259
  },
  "luminance": 0.20587
}

Semantic roles & 50–950 ramp

primary

#3F7CDB

secondary

#DCC29A

accent

#A73DEB

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #3F7CDB

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

Preview Lab → · Contrast checker → · Palette generator →