#3F83C9#3F83C9

#3F83C9 is a mid, vivid cyan. Relative luminance 0.215; OKLCH L 59.9% C 0.128 H 251.4°. Best body text is #000000 at 5.30:1 contrast (WCAG AA passes).

Color values

HEX	#3F83C9
RGB	rgb(63, 131, 201)
HSL	hsl(210, 56%, 52%)
HSV	hsv(210, 69%, 79%)
CMYK	cmyk(68.7%, 34.8%, 0%, 21.2%)
CIE-LAB	lab(53.50, 1.29, -42.59)
CIE-LCH	lch(53.50, 42.61, 271.74°)
OKLab	oklab(59.87% -0.0408 -0.1209)
OKLCH	oklch(59.87% 0.128 251.4)
XYZ	xyz(20.7049, 21.5042, 58.3066)
Luminance	0.2151 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F83C9 #C9853F

analogous

#3FC8C9 #3F83C9 #403FC9

triadic

#3F83C9 #C93F83 #83C93F

tetradic

#3F83C9 #C93FC8 #C9853F #3FC940

square

#3F83C9 #C93FC8 #C9853F #3FC940

split-complementary

#3F83C9 #C9403F #C8C93F

monochromatic

#1F466F #2D659E #3F83C9 #6FA2D6 #9FC1E4

Accessibility & contrast

On white

3.96

#3F83C9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.30

#3F83C9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F83C9

5.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F83C9	#FFFFFF	#000000	##000000
##3F83C9	1.00	3.96	5.30	5.30
#FFFFFF	3.96	1.00	21.00	21.00
#000000	5.30	21.00	1.00	1.00
##000000	5.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6487CC

Deuteranopia (green-blind)

#507AC8

Tritanopia (blue-blind)

#00939C

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #3f83c9;
/* rgb */ color: rgb(63, 131, 201);
/* oklch */ color: oklch(59.9% 0.128 251.4);

Tailwind

colors: {
  custom: {
    50: '#83a6da',
    500: '#3f83c9',
    950: '#000000',
  },
}

SCSS

$custom: #3f83c9;
$custom-light: #83a6da;
$custom-dark: #000000;

JSON

{
  "hex": "#3f83c9",
  "rgb": {
    "r": 63,
    "g": 131,
    "b": 201
  },
  "hsl": {
    "h": 210.435,
    "s": 56.098,
    "l": 51.765
  },
  "oklch": {
    "l": 0.59867,
    "c": 0.12758,
    "h": 251.4
  },
  "luminance": 0.21506
}

Semantic roles & 50–950 ramp

primary

#3F83C9

secondary

#D0B294

accent

#9548DF

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3F83C9

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

Preview Lab → · Contrast checker → · Palette generator →