#3F7BD1#3F7BD1

#3F7BD1 is a mid, vivid blue. Relative luminance 0.198; OKLCH L 58.6% C 0.146 H 257.7°. Best body text is #000000 at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#3F7BD1
RGB	rgb(63, 123, 209)
HSL	hsl(215, 61%, 53%)
HSV	hsv(215, 70%, 82%)
CMYK	cmyk(69.9%, 41.1%, 0%, 18%)
CIE-LAB	lab(51.64, 8.98, -50.08)
CIE-LCH	lch(51.64, 50.88, 280.16°)
OKLab	oklab(58.56% -0.0312 -0.143)
OKLCH	oklch(58.56% 0.146 257.7)
XYZ	xyz(20.6373, 19.8240, 63.0480)
Luminance	0.1983 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7BD1 #D1953F

analogous

#3FC4D1 #3F7BD1 #4C3FD1

triadic

#3F7BD1 #D13F7B #7BD13F

tetradic

#3F7BD1 #D13FC4 #D1953F #3FD14C

square

#3F7BD1 #D13FC4 #D1953F #3FD14C

split-complementary

#3F7BD1 #D14C3F #C4D13F

monochromatic

#1D4379 #295EAA #3F7BD1 #709DDD #A2BFE9

Accessibility & contrast

On white

4.23

#3F7BD1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.97

#3F7BD1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7BD1

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7BD1	#FFFFFF	#000000	##000000
##3F7BD1	1.00	4.23	4.97	4.97
#FFFFFF	4.23	1.00	21.00	21.00
#000000	4.97	21.00	1.00	1.00
##000000	4.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5282D4

Deuteranopia (green-blind)

#3B75CF

Tritanopia (blue-blind)

#008F9C

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #3f7bd1;
/* rgb */ color: rgb(63, 123, 209);
/* oklch */ color: oklch(58.6% 0.146 257.7);

Tailwind

colors: {
  custom: {
    50: '#85a0df',
    500: '#3f7bd1',
    950: '#000000',
  },
}

SCSS

$custom: #3f7bd1;
$custom-light: #85a0df;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7bd1",
  "rgb": {
    "r": 63,
    "g": 123,
    "b": 209
  },
  "hsl": {
    "h": 215.342,
    "s": 61.345,
    "l": 53.333
  },
  "oklch": {
    "l": 0.58557,
    "c": 0.14633,
    "h": 257.7
  },
  "luminance": 0.19826
}

Semantic roles & 50–950 ramp

primary

#3F7BD1

secondary

#D5BB97

accent

#A243E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F7BD1

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

Preview Lab → · Contrast checker → · Palette generator →