#3F5ECF#3F5ECF

#3F5ECF is a mid, vivid blue. Relative luminance 0.136; OKLCH L 52.4% C 0.178 H 268.1°. Best body text is #FFFFFF at 5.66:1 contrast (WCAG AA passes).

Color values

HEX	#3F5ECF
RGB	rgb(63, 94, 207)
HSL	hsl(227, 60%, 53%)
HSV	hsv(227, 70%, 81%)
CMYK	cmyk(69.6%, 54.6%, 0%, 18.8%)
CIE-LAB	lab(43.60, 26.51, -61.86)
CIE-LCH	lch(43.60, 67.30, 293.20°)
OKLab	oklab(52.37% -0.006 -0.1781)
OKLCH	oklch(52.37% 0.178 268.1)
XYZ	xyz(17.3112, 13.5654, 60.7255)
Luminance	0.1357 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5ECF #CFB03F

analogous

#3FA6CF #3F5ECF #683FCF

triadic

#3F5ECF #CF3F5E #5ECF3F

tetradic

#3F5ECF #CF3FA6 #CFB03F #3FCF68

square

#3F5ECF #CF3FA6 #CFB03F #3FCF68

split-complementary

#3F5ECF #CF683F #A6CF3F

monochromatic

#1E3176 #2A45A7 #3F5ECF #7087DB #A1B0E7

Accessibility & contrast

On white

5.66

#3F5ECF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.71

#3F5ECF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5ECF

5.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5ECF	#FFFFFF	#000000	##FFFFFF
##3F5ECF	1.00	5.66	3.71	5.66
#FFFFFF	5.66	1.00	21.00	1.00
#000000	3.71	21.00	1.00	21.00
##FFFFFF	5.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006ED3

Deuteranopia (green-blind)

#0061CD

Tritanopia (blue-blind)

#00798D

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3f5ecf;
/* rgb */ color: rgb(63, 94, 207);
/* oklch */ color: oklch(52.4% 0.178 268.1);

Tailwind

colors: {
  custom: {
    50: '#858bde',
    500: '#3f5ecf',
    950: '#000000',
  },
}

SCSS

$custom: #3f5ecf;
$custom-light: #858bde;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5ecf",
  "rgb": {
    "r": 63,
    "g": 94,
    "b": 207
  },
  "hsl": {
    "h": 227.083,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.52371,
    "c": 0.17816,
    "h": 268.1
  },
  "luminance": 0.13567
}

Semantic roles & 50–950 ramp

primary

#3F5ECF

secondary

#D4C796

accent

#C145E3

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F5ECF

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

Preview Lab → · Contrast checker → · Palette generator →