#3988CB#3988CB

#3988CB is a mid, vivid cyan. Relative luminance 0.228; OKLCH L 60.9% C 0.128 H 247.5°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#3988CB
RGB	rgb(57, 136, 203)
HSL	hsl(208, 58%, 51%)
HSV	hsv(208, 72%, 80%)
CMYK	cmyk(71.9%, 33%, 0%, 20.4%)
CIE-LAB	lab(54.85, -1.85, -41.59)
CIE-LCH	lch(54.85, 41.64, 267.45°)
OKLab	oklab(60.91% -0.0489 -0.118)
OKLCH	oklch(60.91% 0.128 247.5)
XYZ	xyz(21.2669, 22.7876, 59.7660)
Luminance	0.2279 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3988CB #CB7C39

analogous

#39CBC5 #3988CB #393FCB

triadic

#3988CB #CB3988 #88CB39

tetradic

#3988CB #C539CB #CB7C39 #3FCB39

square

#3988CB #C539CB #CB7C39 #3FCB39

split-complementary

#3988CB #CB393F #CBC539

monochromatic

#1D486D #29689D #3988CB #69A5D8 #9AC2E4

Accessibility & contrast

On white

3.78

#3988CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#3988CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3988CB

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3988CB	#FFFFFF	#000000	##000000
##3988CB	1.00	3.78	5.56	5.56
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.56	21.00	1.00	1.00
##000000	5.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A8BCE

Deuteranopia (green-blind)

#557DCA

Tritanopia (blue-blind)

#0098A0

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #3988cb;
/* rgb */ color: rgb(57, 136, 203);
/* oklch */ color: oklch(60.9% 0.128 247.5);

Tailwind

colors: {
  custom: {
    50: '#81aadb',
    500: '#3988cb',
    950: '#000000',
  },
}

SCSS

$custom: #3988cb;
$custom-light: #81aadb;
$custom-dark: #000000;

JSON

{
  "hex": "#3988cb",
  "rgb": {
    "r": 57,
    "g": 136,
    "b": 203
  },
  "hsl": {
    "h": 207.534,
    "s": 58.4,
    "l": 50.98
  },
  "oklch": {
    "l": 0.60909,
    "c": 0.12773,
    "h": 247.5
  },
  "luminance": 0.2279
}

Semantic roles & 50–950 ramp

primary

#3988CB

secondary

#D0AD90

accent

#8E46E2

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #3988CB

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

Preview Lab → · Contrast checker → · Palette generator →