#3F88CC#3F88CC

#3F88CC is a mid, vivid cyan. Relative luminance 0.230; OKLCH L 61.2% C 0.127 H 249.2°. Best body text is #000000 at 5.61:1 contrast (WCAG AA passes).

Color values

HEX	#3F88CC
RGB	rgb(63, 136, 204)
HSL	hsl(209, 58%, 52%)
HSV	hsv(209, 69%, 80%)
CMYK	cmyk(69.1%, 33.3%, 0%, 20%)
CIE-LAB	lab(55.10, -0.62, -41.77)
CIE-LCH	lch(55.10, 41.77, 269.15°)
OKLab	oklab(61.17% -0.0449 -0.1184)
OKLCH	oklch(61.17% 0.127 249.2)
XYZ	xyz(21.7491, 23.0224, 60.4126)
Luminance	0.2303 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F88CC #CC833F

analogous

#3FCCCA #3F88CC #3F42CC

triadic

#3F88CC #CC3F88 #88CC3F

tetradic

#3F88CC #CA3FCC #CC833F #42CC3F

square

#3F88CC #CA3FCC #CC833F #42CC3F

split-complementary

#3F88CC #CC3F42 #CCCA3F

monochromatic

#1E4A72 #2B69A3 #3F88CC #6FA6D9 #A0C4E6

Accessibility & contrast

On white

3.75

#3F88CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.61

#3F88CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F88CC

5.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F88CC	#FFFFFF	#000000	##000000
##3F88CC	1.00	3.75	5.61	5.61
#FFFFFF	3.75	1.00	21.00	21.00
#000000	5.61	21.00	1.00	1.00
##000000	5.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A8BCF

Deuteranopia (green-blind)

#567ECB

Tritanopia (blue-blind)

#0098A0

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #3f88cc;
/* rgb */ color: rgb(63, 136, 204);
/* oklch */ color: oklch(61.2% 0.127 249.2);

Tailwind

colors: {
  custom: {
    50: '#84aadc',
    500: '#3f88cc',
    950: '#000000',
  },
}

SCSS

$custom: #3f88cc;
$custom-light: #84aadc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f88cc",
  "rgb": {
    "r": 63,
    "g": 136,
    "b": 204
  },
  "hsl": {
    "h": 208.936,
    "s": 58.025,
    "l": 52.353
  },
  "oklch": {
    "l": 0.6117,
    "c": 0.12664,
    "h": 249.2
  },
  "luminance": 0.23025
}

Semantic roles & 50–950 ramp

primary

#3F88CC

secondary

#D2B295

accent

#9147E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #3F88CC

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

Preview Lab → · Contrast checker → · Palette generator →