#3591B9#3591B9

#3591B9 is a mid, moderate cyan. Relative luminance 0.245; OKLCH L 62.0% C 0.104 H 230.7°. Best body text is #000000 at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#3591B9
RGB	rgb(53, 145, 185)
HSL	hsl(198, 55%, 47%)
HSV	hsv(198, 71%, 73%)
CMYK	cmyk(71.4%, 21.6%, 0%, 27.5%)
CIE-LAB	lab(56.59, -13.80, -28.67)
CIE-LCH	lch(56.59, 31.82, 244.31°)
OKLab	oklab(61.99% -0.0659 -0.0805)
OKLCH	oklch(61.99% 0.104 230.7)
XYZ	xyz(20.3470, 24.5082, 49.5477)
Luminance	0.2451 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3591B9 #B95D35

analogous

#35B99F #3591B9 #354FB9

triadic

#3591B9 #B93591 #91B935

tetradic

#3591B9 #9F35B9 #B95D35 #4FB935

square

#3591B9 #9F35B9 #B95D35 #4FB935

split-complementary

#3591B9 #B9354F #B99F35

monochromatic

#1A465A #276C89 #3591B9 #5BADD0 #8BC5DE

Accessibility & contrast

On white

3.56

#3591B9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.90

#3591B9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3591B9

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3591B9	#FFFFFF	#000000	##000000
##3591B9	1.00	3.56	5.90	5.90
#FFFFFF	3.56	1.00	21.00	21.00
#000000	5.90	21.00	1.00	1.00
##000000	5.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7D8FBB

Deuteranopia (green-blind)

#6B82B8

Tritanopia (blue-blind)

#009C9E

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #3591b9;
/* rgb */ color: rgb(53, 145, 185);
/* oklch */ color: oklch(62.0% 0.104 230.7);

Tailwind

colors: {
  custom: {
    50: '#7db1ce',
    500: '#3591b9',
    950: '#000000',
  },
}

SCSS

$custom: #3591b9;
$custom-light: #7db1ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3591b9",
  "rgb": {
    "r": 53,
    "g": 145,
    "b": 185
  },
  "hsl": {
    "h": 198.182,
    "s": 55.462,
    "l": 46.667
  },
  "oklch": {
    "l": 0.61987,
    "c": 0.10399,
    "h": 230.7
  },
  "luminance": 0.2451
}

Semantic roles & 50–950 ramp

primary

#3591B9

secondary

#C89782

accent

#7649DF

background

#F8FAFC

surface

#EFF5F9

border

#CACFD2

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #3591B9

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

Preview Lab → · Contrast checker → · Palette generator →