#3580B1#3580B1

#3580B1 is a mid, moderate cyan. Relative luminance 0.194; OKLCH L 57.5% C 0.105 H 240.8°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#3580B1
RGB	rgb(53, 128, 177)
HSL	hsl(204, 54%, 45%)
HSV	hsv(204, 70%, 69%)
CMYK	cmyk(70.1%, 27.7%, 0%, 30.6%)
CIE-LAB	lab(51.11, -6.91, -32.62)
CIE-LCH	lch(51.11, 33.34, 258.04°)
OKLab	oklab(57.52% -0.0514 -0.092)
OKLCH	oklch(57.52% 0.105 240.8)
XYZ	xyz(17.1201, 19.3677, 44.4225)
Luminance	0.1937 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3580B1 #B16635

analogous

#35B1A4 #3580B1 #3542B1

triadic

#3580B1 #B13580 #80B135

tetradic

#3580B1 #A435B1 #B16635 #42B135

square

#3580B1 #A435B1 #B16635 #42B135

split-complementary

#3580B1 #B13542 #B1A435

monochromatic

#193C53 #275E82 #3580B1 #579ECD #86B9DB

Accessibility & contrast

On white

4.31

#3580B1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#3580B1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3580B1

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3580B1	#FFFFFF	#000000	##000000
##3580B1	1.00	4.31	4.87	4.87
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6980B3

Deuteranopia (green-blind)

#5874B0

Tritanopia (blue-blind)

#008C91

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3580b1;
/* rgb */ color: rgb(53, 128, 177);
/* oklch */ color: oklch(57.5% 0.105 240.8);

Tailwind

colors: {
  custom: {
    50: '#7ba4c8',
    500: '#3580b1',
    950: '#000000',
  },
}

SCSS

$custom: #3580b1;
$custom-light: #7ba4c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3580b1",
  "rgb": {
    "r": 53,
    "g": 128,
    "b": 177
  },
  "hsl": {
    "h": 203.71,
    "s": 53.913,
    "l": 45.098
  },
  "oklch": {
    "l": 0.57515,
    "c": 0.1054,
    "h": 240.8
  },
  "luminance": 0.1937
}

Semantic roles & 50–950 ramp

primary

#3580B1

secondary

#C4997D

accent

#854BDD

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0A0F13

muted

#7C7F82

Preview Lab

Preview with #3580B1

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

Preview Lab → · Contrast checker → · Palette generator →