#3F88CB#3F88CB

#3F88CB is a mid, vivid cyan. Relative luminance 0.230; OKLCH L 61.1% C 0.125 H 248.9°. Best body text is #000000 at 5.60:1 contrast (WCAG AA passes).

Color values

HEX	#3F88CB
RGB	rgb(63, 136, 203)
HSL	hsl(209, 57%, 52%)
HSV	hsv(209, 69%, 80%)
CMYK	cmyk(69%, 33%, 0%, 20.4%)
CIE-LAB	lab(55.05, -0.97, -41.28)
CIE-LCH	lch(55.05, 41.29, 268.65°)
OKLab	oklab(61.11% -0.0451 -0.117)
OKLCH	oklch(61.11% 0.125 248.9)
XYZ	xyz(21.6295, 22.9746, 59.7830)
Luminance	0.2298 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F88CB #CB823F

analogous

#3FCBC8 #3F88CB #3F42CB

triadic

#3F88CB #CB3F88 #88CB3F

tetradic

#3F88CB #C83FCB #CB823F #42CB3F

square

#3F88CB #C83FCB #CB823F #42CB3F

split-complementary

#3F88CB #CB3F42 #CBC83F

monochromatic

#1F4A71 #2C69A1 #3F88CB #6FA6D8 #9FC4E5

Accessibility & contrast

On white

3.75

#3F88CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.60

#3F88CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F88CB

5.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F88CB	#FFFFFF	#000000	##000000
##3F88CB	1.00	3.75	5.60	5.60
#FFFFFF	3.75	1.00	21.00	21.00
#000000	5.60	21.00	1.00	1.00
##000000	5.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A8BCE

Deuteranopia (green-blind)

#567ECA

Tritanopia (blue-blind)

#0098A0

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #3f88cb;
/* rgb */ color: rgb(63, 136, 203);
/* oklch */ color: oklch(61.1% 0.125 248.9);

Tailwind

colors: {
  custom: {
    50: '#84aadb',
    500: '#3f88cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f88cb;
$custom-light: #84aadb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f88cb",
  "rgb": {
    "r": 63,
    "g": 136,
    "b": 203
  },
  "hsl": {
    "h": 208.714,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.61115,
    "c": 0.12541,
    "h": 248.9
  },
  "luminance": 0.22977
}

Semantic roles & 50–950 ramp

primary

#3F88CB

secondary

#D1B294

accent

#9147E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #3F88CB

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

Preview Lab → · Contrast checker → · Palette generator →