#3F7FD9#3F7FD9

#3F7FD9 is a mid, vivid blue. Relative luminance 0.212; OKLCH L 59.9% C 0.152 H 257.4°. Best body text is #000000 at 5.25:1 contrast (WCAG AA passes).

Color values

HEX	#3F7FD9
RGB	rgb(63, 127, 217)
HSL	hsl(215, 67%, 55%)
HSV	hsv(215, 71%, 85%)
CMYK	cmyk(71%, 41.5%, 0%, 14.9%)
CIE-LAB	lab(53.21, 9.40, -52.09)
CIE-LCH	lch(53.21, 52.93, 280.22°)
OKLab	oklab(59.93% -0.0332 -0.1488)
OKLCH	oklch(59.93% 0.152 257.4)
XYZ	xyz(22.1591, 21.2429, 68.5646)
Luminance	0.2124 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7FD9 #D9993F

analogous

#3FCCD9 #3F7FD9 #4C3FD9

triadic

#3F7FD9 #D93F7F #7FD93F

tetradic

#3F7FD9 #D93FCC #D9993F #3FD94C

square

#3F7FD9 #D93FCC #D9993F #3FD94C

split-complementary

#3F7FD9 #D94C3F #CCD93F

monochromatic

#1A4684 #2461B7 #3F7FD9 #72A1E3 #A5C3ED

Accessibility & contrast

On white

4.00

#3F7FD9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.25

#3F7FD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7FD9

5.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7FD9	#FFFFFF	#000000	##000000
##3F7FD9	1.00	4.00	5.25	5.25
#FFFFFF	4.00	1.00	21.00	21.00
#000000	5.25	21.00	1.00	1.00
##000000	5.25	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5487DD

Deuteranopia (green-blind)

#3A79D7

Tritanopia (blue-blind)

#0094A1

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #3f7fd9;
/* rgb */ color: rgb(63, 127, 217);
/* oklch */ color: oklch(59.9% 0.152 257.4);

Tailwind

colors: {
  custom: {
    50: '#86a3e5',
    500: '#3f7fd9',
    950: '#000000',
  },
}

SCSS

$custom: #3f7fd9;
$custom-light: #86a3e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7fd9",
  "rgb": {
    "r": 63,
    "g": 127,
    "b": 217
  },
  "hsl": {
    "h": 215.065,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.59926,
    "c": 0.15245,
    "h": 257.4
  },
  "luminance": 0.21245
}

Semantic roles & 50–950 ramp

primary

#3F7FD9

secondary

#DABF9A

accent

#A23EEA

background

#F8FAFE

surface

#F0F3FC

border

#CBCDD5

text

#0D0F16

muted

#7D7F84

Preview Lab

Preview with #3F7FD9

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

Preview Lab → · Contrast checker → · Palette generator →