#3F88BB#3F88BB

#3F88BB is a mid, moderate cyan. Relative luminance 0.223; OKLCH L 60.3% C 0.106 H 242.0°. Best body text is #000000 at 5.45:1 contrast (WCAG AA passes).

Color values

HEX	#3F88BB
RGB	rgb(63, 136, 187)
HSL	hsl(205, 50%, 49%)
HSV	hsv(205, 66%, 73%)
CMYK	cmyk(66.3%, 27.3%, 0%, 26.7%)
CIE-LAB	lab(54.29, -6.48, -33.37)
CIE-LCH	lch(54.29, 33.99, 259.01°)
OKLab	oklab(60.27% -0.05 -0.094)
OKLCH	oklch(60.27% 0.106 242)
XYZ	xyz(19.8203, 22.2509, 50.2544)
Luminance	0.2225 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F88BB #BB723F

analogous

#3FBBB0 #3F88BB #3F4ABB

triadic

#3F88BB #BB3F88 #88BB3F

tetradic

#3F88BB #B03FBB #BB723F #4ABB3F

square

#3F88BB #B03FBB #BB723F #4ABB3F

split-complementary

#3F88BB #BB3F4A #BBB03F

monochromatic

#20455F #30678D #3F88BB #6AA4CD #98C0DC

Accessibility & contrast

On white

3.85

#3F88BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.45

#3F88BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F88BB

5.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F88BB	#FFFFFF	#000000	##000000
##3F88BB	1.00	3.85	5.45	5.45
#FFFFFF	3.85	1.00	21.00	21.00
#000000	5.45	21.00	1.00	1.00
##000000	5.45	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7189BD

Deuteranopia (green-blind)

#607CBA

Tritanopia (blue-blind)

#00959A

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #3f88bb;
/* rgb */ color: rgb(63, 136, 187);
/* oklch */ color: oklch(60.3% 0.106 242.0);

Tailwind

colors: {
  custom: {
    50: '#81aacf',
    500: '#3f88bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f88bb;
$custom-light: #81aacf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f88bb",
  "rgb": {
    "r": 63,
    "g": 136,
    "b": 187
  },
  "hsl": {
    "h": 204.677,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.60273,
    "c": 0.10648,
    "h": 242
  },
  "luminance": 0.22253
}

Semantic roles & 50–950 ramp

primary

#3F88BB

secondary

#C8A68E

accent

#884FD9

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B1014

muted

#7C7F82

Preview Lab

Preview with #3F88BB

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

Preview Lab → · Contrast checker → · Palette generator →