#3F7CD9#3F7CD9

#3F7CD9 is a mid, vivid blue. Relative luminance 0.205; OKLCH L 59.3% C 0.156 H 258.7°. Best body text is #000000 at 5.10:1 contrast (WCAG AA passes).

Color values

HEX	#3F7CD9
RGB	rgb(63, 124, 217)
HSL	hsl(216, 67%, 55%)
HSV	hsv(216, 71%, 85%)
CMYK	cmyk(71%, 42.9%, 0%, 14.9%)
CIE-LAB	lab(52.38, 11.24, -53.43)
CIE-LCH	lch(52.38, 54.60, 281.88°)
OKLab	oklab(59.28% -0.0305 -0.1528)
OKLCH	oklch(59.28% 0.156 258.7)
XYZ	xyz(21.7774, 20.4795, 68.4374)
Luminance	0.2048 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7CD9 #D99C3F

analogous

#3FC9D9 #3F7CD9 #4F3FD9

triadic

#3F7CD9 #D93F7C #7CD93F

tetradic

#3F7CD9 #D93FC9 #D99C3F #3FD94F

square

#3F7CD9 #D93FC9 #D99C3F #3FD94F

split-complementary

#3F7CD9 #D94F3F #C9D93F

monochromatic

#1A4484 #245EB7 #3F7CD9 #729FE3 #A5C2ED

Accessibility & contrast

On white

4.12

#3F7CD9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.10

#3F7CD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7CD9

5.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7CD9	#FFFFFF	#000000	##000000
##3F7CD9	1.00	4.12	5.10	5.10
#FFFFFF	4.12	1.00	21.00	21.00
#000000	5.10	21.00	1.00	1.00
##000000	5.10	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F85DD

Deuteranopia (green-blind)

#3376D7

Tritanopia (blue-blind)

#0092A0

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #3f7cd9;
/* rgb */ color: rgb(63, 124, 217);
/* oklch */ color: oklch(59.3% 0.156 258.7);

Tailwind

colors: {
  custom: {
    50: '#86a1e5',
    500: '#3f7cd9',
    950: '#000000',
  },
}

SCSS

$custom: #3f7cd9;
$custom-light: #86a1e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7cd9",
  "rgb": {
    "r": 63,
    "g": 124,
    "b": 217
  },
  "hsl": {
    "h": 216.234,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.59276,
    "c": 0.1558,
    "h": 258.7
  },
  "luminance": 0.20482
}

Semantic roles & 50–950 ramp

primary

#3F7CD9

secondary

#DAC19A

accent

#A63EEA

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #3F7CD9

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

Preview Lab → · Contrast checker → · Palette generator →