#3F83BC#3F83BC

#3F83BC is a mid, moderate cyan. Relative luminance 0.209; OKLCH L 59.2% C 0.111 H 246.5°. Best body text is #000000 at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#3F83BC
RGB	rgb(63, 131, 188)
HSL	hsl(207, 50%, 49%)
HSV	hsv(207, 66%, 74%)
CMYK	cmyk(66.5%, 30.3%, 0%, 26.3%)
CIE-LAB	lab(52.86, -3.23, -36.18)
CIE-LCH	lch(52.86, 36.33, 264.90°)
OKLab	oklab(59.16% -0.0445 -0.1022)
OKLCH	oklch(59.16% 0.111 246.5)
XYZ	xyz(19.2399, 20.9182, 50.5909)
Luminance	0.2092 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F83BC #BC783F

analogous

#3FBCB7 #3F83BC #3F45BC

triadic

#3F83BC #BC3F83 #83BC3F

tetradic

#3F83BC #B73FBC #BC783F #45BC3F

square

#3F83BC #B73FBC #BC783F #45BC3F

split-complementary

#3F83BC #BC3F45 #BCB73F

monochromatic

#204360 #30638E #3F83BC #6BA0CD #99BEDD

Accessibility & contrast

On white

4.05

#3F83BC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.18

#3F83BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F83BC

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F83BC	#FFFFFF	#000000	##000000
##3F83BC	1.00	4.05	5.18	5.18
#FFFFFF	4.05	1.00	21.00	21.00
#000000	5.18	21.00	1.00	1.00
##000000	5.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A85BE

Deuteranopia (green-blind)

#5979BB

Tritanopia (blue-blind)

#009197

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #3f83bc;
/* rgb */ color: rgb(63, 131, 188);
/* oklch */ color: oklch(59.2% 0.111 246.5);

Tailwind

colors: {
  custom: {
    50: '#81a6d0',
    500: '#3f83bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f83bc;
$custom-light: #81a6d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f83bc",
  "rgb": {
    "r": 63,
    "g": 131,
    "b": 188
  },
  "hsl": {
    "h": 207.36,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.59158,
    "c": 0.11147,
    "h": 246.5
  },
  "luminance": 0.2092
}

Semantic roles & 50–950 ramp

primary

#3F83BC

secondary

#C9A98E

accent

#8E4ED9

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3F83BC

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

Preview Lab → · Contrast checker → · Palette generator →