#3581BC#3581BC

#3581BC is a mid, moderate cyan. Relative luminance 0.201; OKLCH L 58.3% C 0.117 H 245.4°. Best body text is #000000 at 5.02:1 contrast (WCAG AA passes).

Color values

HEX	#3581BC
RGB	rgb(53, 129, 188)
HSL	hsl(206, 56%, 47%)
HSV	hsv(206, 72%, 74%)
CMYK	cmyk(71.8%, 31.4%, 0%, 26.3%)
CIE-LAB	lab(51.93, -3.62, -37.66)
CIE-LCH	lch(51.93, 37.83, 264.51°)
OKLab	oklab(58.33% -0.0489 -0.1066)
OKLCH	oklch(58.33% 0.117 245.4)
XYZ	xyz(18.3921, 20.0862, 50.4749)
Luminance	0.2009 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3581BC #BC7035

analogous

#35BCB4 #3581BC #353EBC

triadic

#3581BC #BC3581 #81BC35

tetradic

#3581BC #B435BC #BC7035 #3EBC35

square

#3581BC #B435BC #BC7035 #3EBC35

split-complementary

#3581BC #BC353E #BCB435

monochromatic

#1A3F5D #28608C #3581BC #5D9ED1 #8DBBDF

Accessibility & contrast

On white

4.19

#3581BC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.02

#3581BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3581BC

5.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3581BC	#FFFFFF	#000000	##000000
##3581BC	1.00	4.19	5.02	5.02
#FFFFFF	4.19	1.00	21.00	21.00
#000000	5.02	21.00	1.00	1.00
##000000	5.02	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6683BF

Deuteranopia (green-blind)

#5376BB

Tritanopia (blue-blind)

#008F96

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #3581bc;
/* rgb */ color: rgb(53, 129, 188);
/* oklch */ color: oklch(58.3% 0.117 245.4);

Tailwind

colors: {
  custom: {
    50: '#7da5d0',
    500: '#3581bc',
    950: '#000000',
  },
}

SCSS

$custom: #3581bc;
$custom-light: #7da5d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3581bc",
  "rgb": {
    "r": 53,
    "g": 129,
    "b": 188
  },
  "hsl": {
    "h": 206.222,
    "s": 56.017,
    "l": 47.255
  },
  "oklch": {
    "l": 0.58334,
    "c": 0.11734,
    "h": 245.4
  },
  "luminance": 0.20088
}

Semantic roles & 50–950 ramp

primary

#3581BC

secondary

#C9A284

accent

#8A48DF

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3581BC

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

Preview Lab → · Contrast checker → · Palette generator →