#3788BB#3788BB

#3788BB is a mid, moderate cyan. Relative luminance 0.220; OKLCH L 60.0% C 0.110 H 240.0°. Best body text is #000000 at 5.40:1 contrast (WCAG AA passes).

Color values

HEX	#3788BB
RGB	rgb(55, 136, 187)
HSL	hsl(203, 55%, 47%)
HSV	hsv(203, 71%, 73%)
CMYK	cmyk(70.6%, 27.3%, 0%, 26.7%)
CIE-LAB	lab(54.03, -7.75, -33.79)
CIE-LCH	lch(54.03, 34.67, 257.08°)
OKLab	oklab(60% -0.055 -0.0953)
OKLCH	oklch(60% 0.11 240)
XYZ	xyz(19.3459, 22.0063, 50.2321)
Luminance	0.2201 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3788BB #BB6A37

analogous

#37BBAC #3788BB #3746BB

triadic

#3788BB #BB3788 #88BB37

tetradic

#3788BB #AC37BB #BB6A37 #46BB37

square

#3788BB #AC37BB #BB6A37 #46BB37

split-complementary

#3788BB #BB3746 #BBAC37

monochromatic

#1B435C #29668C #3788BB #5FA4D0 #8EBFDE

Accessibility & contrast

On white

3.89

#3788BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.40

#3788BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3788BB

5.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3788BB	#FFFFFF	#000000	##000000
##3788BB	1.00	3.89	5.40	5.40
#FFFFFF	3.89	1.00	21.00	21.00
#000000	5.40	21.00	1.00	1.00
##000000	5.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7088BD

Deuteranopia (green-blind)

#5E7CBA

Tritanopia (blue-blind)

#00959A

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #3788bb;
/* rgb */ color: rgb(55, 136, 187);
/* oklch */ color: oklch(60.0% 0.110 240.0);

Tailwind

colors: {
  custom: {
    50: '#7eaacf',
    500: '#3788bb',
    950: '#000000',
  },
}

SCSS

$custom: #3788bb;
$custom-light: #7eaacf;
$custom-dark: #000000;

JSON

{
  "hex": "#3788bb",
  "rgb": {
    "r": 55,
    "g": 136,
    "b": 187
  },
  "hsl": {
    "h": 203.182,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.59996,
    "c": 0.11004,
    "h": 240
  },
  "luminance": 0.22008
}

Semantic roles & 50–950 ramp

primary

#3788BB

secondary

#C99F85

accent

#834ADE

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B1014

muted

#7C7F82

Preview Lab

Preview with #3788BB

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

Preview Lab → · Contrast checker → · Palette generator →