#3591B4#3591B4

#3591B4 is a mid, moderate cyan. Relative luminance 0.243; OKLCH L 61.8% C 0.100 H 227.2°. Best body text is #000000 at 5.86:1 contrast (WCAG AA passes).

Color values

HEX	#3591B4
RGB	rgb(53, 145, 180)
HSL	hsl(197, 55%, 46%)
HSV	hsv(197, 71%, 71%)
CMYK	cmyk(70.6%, 19.4%, 0%, 29.4%)
CIE-LAB	lab(56.39, -15.47, -26.15)
CIE-LCH	lch(56.39, 30.38, 239.38°)
OKLab	oklab(61.76% -0.0677 -0.0732)
OKLCH	oklch(61.76% 0.1 227.2)
XYZ	xyz(19.8285, 24.3007, 46.8167)
Luminance	0.2430 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3591B4 #B45835

analogous

#35B497 #3591B4 #3552B4

triadic

#3591B4 #B43591 #91B435

tetradic

#3591B4 #9735B4 #B45835 #52B435

square

#3591B4 #9735B4 #B45835 #52B435

split-complementary

#3591B4 #B43552 #B49735

monochromatic

#194555 #276B85 #3591B4 #58ADCE #88C5DC

Accessibility & contrast

On white

3.58

#3591B4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.86

#3591B4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3591B4

5.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3591B4	#FFFFFF	#000000	##000000
##3591B4	1.00	3.58	5.86	5.86
#FFFFFF	3.58	1.00	21.00	21.00
#000000	5.86	21.00	1.00	1.00
##000000	5.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7E8EB6

Deuteranopia (green-blind)

#6D82B4

Tritanopia (blue-blind)

#009B9C

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #3591b4;
/* rgb */ color: rgb(53, 145, 180);
/* oklch */ color: oklch(61.8% 0.100 227.2);

Tailwind

colors: {
  custom: {
    50: '#7cb1ca',
    500: '#3591b4',
    950: '#000000',
  },
}

SCSS

$custom: #3591b4;
$custom-light: #7cb1ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3591b4",
  "rgb": {
    "r": 53,
    "g": 145,
    "b": 180
  },
  "hsl": {
    "h": 196.535,
    "s": 54.506,
    "l": 45.686
  },
  "oklch": {
    "l": 0.61755,
    "c": 0.09974,
    "h": 227.2
  },
  "luminance": 0.24303
}

Semantic roles & 50–950 ramp

primary

#3591B4

secondary

#C6937F

accent

#734ADE

background

#F8FAFC

surface

#EFF5F8

border

#CACFD1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #3591B4

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

Preview Lab → · Contrast checker → · Palette generator →