#3591B5#3591B5

#3591B5 is a mid, moderate cyan. Relative luminance 0.243; OKLCH L 61.8% C 0.101 H 228.0°. Best body text is #000000 at 5.87:1 contrast (WCAG AA passes).

Color values

HEX	#3591B5
RGB	rgb(53, 145, 181)
HSL	hsl(197, 55%, 46%)
HSV	hsv(197, 71%, 71%)
CMYK	cmyk(70.7%, 19.9%, 0%, 29%)
CIE-LAB	lab(56.43, -15.14, -26.65)
CIE-LCH	lch(56.43, 30.65, 240.40°)
OKLab	oklab(61.8% -0.0673 -0.0747)
OKLCH	oklch(61.8% 0.101 228)
XYZ	xyz(19.9307, 24.3416, 47.3551)
Luminance	0.2434 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3591B5 #B55935

analogous

#35B599 #3591B5 #3551B5

triadic

#3591B5 #B53591 #91B535

tetradic

#3591B5 #9935B5 #B55935 #51B535

square

#3591B5 #9935B5 #B55935 #51B535

split-complementary

#3591B5 #B53551 #B59935

monochromatic

#194556 #276B86 #3591B5 #59ADCE #88C5DC

Accessibility & contrast

On white

3.58

#3591B5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.87

#3591B5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3591B5

5.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3591B5	#FFFFFF	#000000	##000000
##3591B5	1.00	3.58	5.87	5.87
#FFFFFF	3.58	1.00	21.00	21.00
#000000	5.87	21.00	1.00	1.00
##000000	5.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7E8EB7

Deuteranopia (green-blind)

#6C82B5

Tritanopia (blue-blind)

#009B9D

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #3591b5;
/* rgb */ color: rgb(53, 145, 181);
/* oklch */ color: oklch(61.8% 0.101 228.0);

Tailwind

colors: {
  custom: {
    50: '#7db1cb',
    500: '#3591b5',
    950: '#000000',
  },
}

SCSS

$custom: #3591b5;
$custom-light: #7db1cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3591b5",
  "rgb": {
    "r": 53,
    "g": 145,
    "b": 181
  },
  "hsl": {
    "h": 196.875,
    "s": 54.701,
    "l": 45.882
  },
  "oklch": {
    "l": 0.61801,
    "c": 0.10056,
    "h": 228
  },
  "luminance": 0.24344
}

Semantic roles & 50–950 ramp

primary

#3591B5

secondary

#C69380

accent

#734ADE

background

#F8FAFC

surface

#EFF5F8

border

#CACFD1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #3591B5

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

Preview Lab → · Contrast checker → · Palette generator →