#3F76CB#3F76CB

#3F76CB is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.1% C 0.144 H 258.9°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#3F76CB
RGB	rgb(63, 118, 203)
HSL	hsl(216, 57%, 52%)
HSV	hsv(216, 69%, 80%)
CMYK	cmyk(69%, 41.9%, 0%, 20.4%)
CIE-LAB	lab(49.89, 9.91, -49.46)
CIE-LCH	lch(49.89, 50.45, 281.33°)
OKLab	oklab(57.09% -0.0278 -0.1412)
OKLCH	oklch(57.09% 0.144 258.9)
XYZ	xyz(19.3039, 18.3234, 59.0078)
Luminance	0.1832 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F76CB #CB943F

analogous

#3FBCCB #3F76CB #4E3FCB

triadic

#3F76CB #CB3F76 #76CB3F

tetradic

#3F76CB #CB3FBC #CB943F #3FCB4E

square

#3F76CB #CB3FBC #CB943F #3FCB4E

split-complementary

#3F76CB #CB4E3F #BCCB3F

monochromatic

#1F3F71 #2C5AA1 #3F76CB #6F98D8 #9FBBE5

Accessibility & contrast

On white

4.50

#3F76CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.67

#3F76CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F76CB

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F76CB	#FFFFFF	#000000	##000000
##3F76CB	1.00	4.50	4.67	4.67
#FFFFFF	4.50	1.00	21.00	21.00
#000000	4.67	21.00	1.00	1.00
##000000	4.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E7ECE

Deuteranopia (green-blind)

#3771C9

Tritanopia (blue-blind)

#008A96

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f76cb;
/* rgb */ color: rgb(63, 118, 203);
/* oklch */ color: oklch(57.1% 0.144 258.9);

Tailwind

colors: {
  custom: {
    50: '#849ddb',
    500: '#3f76cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f76cb;
$custom-light: #849ddb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f76cb",
  "rgb": {
    "r": 63,
    "g": 118,
    "b": 203
  },
  "hsl": {
    "h": 216.429,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.57089,
    "c": 0.14391,
    "h": 258.9
  },
  "luminance": 0.18325
}

Semantic roles & 50–950 ramp

primary

#3F76CB

secondary

#D1B994

accent

#A447E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F76CB

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

Preview Lab → · Contrast checker → · Palette generator →