#3F7BDB#3F7BDB

#3F7BDB is a mid, vivid blue. Relative luminance 0.203; OKLCH L 59.2% C 0.160 H 259.4°. Best body text is #000000 at 5.07:1 contrast (WCAG AA passes).

Color values

HEX	#3F7BDB
RGB	rgb(63, 123, 219)
HSL	hsl(217, 68%, 55%)
HSV	hsv(217, 71%, 86%)
CMYK	cmyk(71.2%, 43.8%, 0%, 14.1%)
CIE-LAB	lab(52.21, 12.57, -54.82)
CIE-LCH	lch(52.21, 56.24, 282.92°)
OKLab	oklab(59.19% -0.0292 -0.1569)
OKLCH	oklch(59.19% 0.16 259.4)
XYZ	xyz(21.9144, 20.3348, 69.7742)
Luminance	0.2034 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7BDB #DB9F3F

analogous

#3FC9DB #3F7BDB #513FDB

triadic

#3F7BDB #DB3F7B #7BDB3F

tetradic

#3F7BDB #DB3FC9 #DB9F3F #3FDB51

square

#3F7BDB #DB3FC9 #DB9F3F #3FDB51

split-complementary

#3F7BDB #DB513F #C9DB3F

monochromatic

#194386 #235DBA #3F7BDB #739EE5 #A6C2EE

Accessibility & contrast

On white

4.14

#3F7BDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.07

#3F7BDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7BDB

5.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7BDB	#FFFFFF	#000000	##000000
##3F7BDB	1.00	4.14	5.07	5.07
#FFFFFF	4.14	1.00	21.00	21.00
#000000	5.07	21.00	1.00	1.00
##000000	5.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B84DF

Deuteranopia (green-blind)

#2E76D9

Tritanopia (blue-blind)

#0091A0

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #3f7bdb;
/* rgb */ color: rgb(63, 123, 219);
/* oklch */ color: oklch(59.2% 0.160 259.4);

Tailwind

colors: {
  custom: {
    50: '#86a0e7',
    500: '#3f7bdb',
    950: '#000000',
  },
}

SCSS

$custom: #3f7bdb;
$custom-light: #86a0e7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7bdb",
  "rgb": {
    "r": 63,
    "g": 123,
    "b": 219
  },
  "hsl": {
    "h": 216.923,
    "s": 68.421,
    "l": 55.294
  },
  "oklch": {
    "l": 0.59189,
    "c": 0.15957,
    "h": 259.4
  },
  "luminance": 0.20337
}

Semantic roles & 50–950 ramp

primary

#3F7BDB

secondary

#DCC29A

accent

#A83DEB

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #3F7BDB

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

Preview Lab → · Contrast checker → · Palette generator →