#3F84CB#3F84CB

#3F84CB is a mid, vivid cyan. Relative luminance 0.219; OKLCH L 60.2% C 0.129 H 251.4°. Best body text is #000000 at 5.37:1 contrast (WCAG AA passes).

Color values

HEX	#3F84CB
RGB	rgb(63, 132, 203)
HSL	hsl(210, 57%, 52%)
HSV	hsv(210, 69%, 80%)
CMYK	cmyk(69%, 35%, 0%, 20.4%)
CIE-LAB	lab(53.89, 1.40, -43.11)
CIE-LCH	lch(53.89, 43.13, 271.86°)
OKLab	oklab(60.21% -0.0412 -0.1224)
OKLCH	oklch(60.21% 0.129 251.4)
XYZ	xyz(21.0767, 21.8689, 59.5987)
Luminance	0.2187 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F84CB #CB863F

analogous

#3FCACB #3F84CB #403FCB

triadic

#3F84CB #CB3F84 #84CB3F

tetradic

#3F84CB #CB3FCA #CB863F #3FCB40

square

#3F84CB #CB3FCA #CB863F #3FCB40

split-complementary

#3F84CB #CB403F #CACB3F

monochromatic

#1F4771 #2C66A1 #3F84CB #6FA3D8 #9FC2E5

Accessibility & contrast

On white

3.91

#3F84CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.37

#3F84CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F84CB

5.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F84CB	#FFFFFF	#000000	##000000
##3F84CB	1.00	3.91	5.37	5.37
#FFFFFF	3.91	1.00	21.00	21.00
#000000	5.37	21.00	1.00	1.00
##000000	5.37	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6488CE

Deuteranopia (green-blind)

#507BCA

Tritanopia (blue-blind)

#00959E

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #3f84cb;
/* rgb */ color: rgb(63, 132, 203);
/* oklch */ color: oklch(60.2% 0.129 251.4);

Tailwind

colors: {
  custom: {
    50: '#83a7db',
    500: '#3f84cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f84cb;
$custom-light: #83a7db;
$custom-dark: #000000;

JSON

{
  "hex": "#3f84cb",
  "rgb": {
    "r": 63,
    "g": 132,
    "b": 203
  },
  "hsl": {
    "h": 210.429,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.60206,
    "c": 0.12915,
    "h": 251.4
  },
  "luminance": 0.21871
}

Semantic roles & 50–950 ramp

primary

#3F84CB

secondary

#D1B394

accent

#9547E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3F84CB

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

Preview Lab → · Contrast checker → · Palette generator →