#3F7BD0#3F7BD0

#3F7BD0 is a mid, vivid blue. Relative luminance 0.198; OKLCH L 58.5% C 0.145 H 257.5°. Best body text is #000000 at 4.96:1 contrast (WCAG AA passes).

Color values

HEX	#3F7BD0
RGB	rgb(63, 123, 208)
HSL	hsl(215, 61%, 53%)
HSV	hsv(215, 70%, 82%)
CMYK	cmyk(69.7%, 40.9%, 0%, 18.4%)
CIE-LAB	lab(51.58, 8.62, -49.60)
CIE-LCH	lch(51.58, 50.35, 279.86°)
OKLab	oklab(58.5% -0.0314 -0.1415)
OKLCH	oklch(58.5% 0.145 257.5)
XYZ	xyz(20.5139, 19.7746, 62.3980)
Luminance	0.1978 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7BD0 #D0943F

analogous

#3FC4D0 #3F7BD0 #4B3FD0

triadic

#3F7BD0 #D03F7B #7BD03F

tetradic

#3F7BD0 #D03FC4 #D0943F #3FD04B

square

#3F7BD0 #D03FC4 #D0943F #3FD04B

split-complementary

#3F7BD0 #D04B3F #C4D03F

monochromatic

#1D4377 #295EA9 #3F7BD0 #709DDC #A1BFE8

Accessibility & contrast

On white

4.24

#3F7BD0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.96

#3F7BD0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7BD0

4.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7BD0	#FFFFFF	#000000	##000000
##3F7BD0	1.00	4.24	4.96	4.96
#FFFFFF	4.24	1.00	21.00	21.00
#000000	4.96	21.00	1.00	1.00
##000000	4.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5382D3

Deuteranopia (green-blind)

#3C75CE

Tritanopia (blue-blind)

#008F9B

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #3f7bd0;
/* rgb */ color: rgb(63, 123, 208);
/* oklch */ color: oklch(58.5% 0.145 257.5);

Tailwind

colors: {
  custom: {
    50: '#84a0df',
    500: '#3f7bd0',
    950: '#000000',
  },
}

SCSS

$custom: #3f7bd0;
$custom-light: #84a0df;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7bd0",
  "rgb": {
    "r": 63,
    "g": 123,
    "b": 208
  },
  "hsl": {
    "h": 215.172,
    "s": 60.669,
    "l": 53.137
  },
  "oklch": {
    "l": 0.58495,
    "c": 0.145,
    "h": 257.5
  },
  "luminance": 0.19777
}

Semantic roles & 50–950 ramp

primary

#3F7BD0

secondary

#D5BB96

accent

#A244E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F7BD0

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

Preview Lab → · Contrast checker → · Palette generator →