#3580B3#3580B3

#3580B3 is a mid, moderate cyan. Relative luminance 0.195; OKLCH L 57.6% C 0.108 H 241.9°. Best body text is #000000 at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#3580B3
RGB	rgb(53, 128, 179)
HSL	hsl(204, 54%, 45%)
HSV	hsv(204, 70%, 70%)
CMYK	cmyk(70.4%, 28.5%, 0%, 29.8%)
CIE-LAB	lab(51.21, -6.21, -33.63)
CIE-LCH	lch(51.21, 34.20, 259.53°)
OKLab	oklab(57.62% -0.0507 -0.0949)
OKLCH	oklch(57.62% 0.108 241.9)
XYZ	xyz(17.3209, 19.4480, 45.4801)
Luminance	0.1945 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3580B3 #B36835

analogous

#35B3A7 #3580B3 #3541B3

triadic

#3580B3 #B33580 #80B335

tetradic

#3580B3 #A735B3 #B36835 #41B335

square

#3580B3 #A735B3 #B36835 #41B335

split-complementary

#3580B3 #B33541 #B3A735

monochromatic

#193C55 #275E84 #3580B3 #589ECD #87B9DB

Accessibility & contrast

On white

4.29

#3580B3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.89

#3580B3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3580B3

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3580B3	#FFFFFF	#000000	##000000
##3580B3	1.00	4.29	4.89	4.89
#FFFFFF	4.29	1.00	21.00	21.00
#000000	4.89	21.00	1.00	1.00
##000000	4.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6981B5

Deuteranopia (green-blind)

#5775B2

Tritanopia (blue-blind)

#008D92

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3580b3;
/* rgb */ color: rgb(53, 128, 179);
/* oklch */ color: oklch(57.6% 0.108 241.9);

Tailwind

colors: {
  custom: {
    50: '#7ba4ca',
    500: '#3580b3',
    950: '#000000',
  },
}

SCSS

$custom: #3580b3;
$custom-light: #7ba4ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3580b3",
  "rgb": {
    "r": 53,
    "g": 128,
    "b": 179
  },
  "hsl": {
    "h": 204.286,
    "s": 54.31,
    "l": 45.49
  },
  "oklch": {
    "l": 0.57619,
    "c": 0.10765,
    "h": 241.9
  },
  "luminance": 0.1945
}

Semantic roles & 50–950 ramp

primary

#3580B3

secondary

#C59B7F

accent

#864ADE

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #3580B3

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

Preview Lab → · Contrast checker → · Palette generator →