#1583B4#1583B4

#1583B4 is a mid, moderate cyan. Relative luminance 0.197; OKLCH L 57.7% C 0.117 H 235.0°. Best body text is #000000 at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#1583B4
RGB	rgb(21, 131, 180)
HSL	hsl(198, 79%, 39%)
HSV	hsv(198, 88%, 71%)
CMYK	cmyk(88.3%, 27.2%, 0%, 29.4%)
CIE-LAB	lab(51.48, -11.03, -33.83)
CIE-LCH	lch(51.48, 35.58, 251.93°)
OKLab	oklab(57.65% -0.067 -0.0957)
OKLCH	oklch(57.65% 0.117 235)
XYZ	xyz(16.6604, 19.6851, 46.0927)
Luminance	0.1969 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1583B4 #B44615

analogous

#15B496 #1583B4 #1533B4

triadic

#1583B4 #B41583 #83B415

tetradic

#1583B4 #9615B4 #B44615 #33B415

square

#1583B4 #9615B4 #B44615 #33B415

split-complementary

#1583B4 #B41533 #B49615

monochromatic

#083346 #0F5B7D #1583B4 #21A9E5 #58BEEC

Accessibility & contrast

On white

4.25

#1583B4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.94

#1583B4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #1583B4

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1583B4	#FFFFFF	#000000	##000000
##1583B4	1.00	4.25	4.94	4.94
#FFFFFF	4.25	1.00	21.00	21.00
#000000	4.94	21.00	1.00	1.00
##000000	4.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B82B6

Deuteranopia (green-blind)

#5675B3

Tritanopia (blue-blind)

#009094

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #1583b4;
/* rgb */ color: rgb(21, 131, 180);
/* oklch */ color: oklch(57.7% 0.117 235.0);

Tailwind

colors: {
  custom: {
    50: '#73a7ca',
    500: '#1583b4',
    950: '#000000',
  },
}

SCSS

$custom: #1583b4;
$custom-light: #73a7ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1583b4",
  "rgb": {
    "r": 21,
    "g": 131,
    "b": 180
  },
  "hsl": {
    "h": 198.491,
    "s": 79.104,
    "l": 39.412
  },
  "oklch": {
    "l": 0.57654,
    "c": 0.11686,
    "h": 235
  },
  "luminance": 0.19687
}

Semantic roles & 50–950 ramp

primary

#1583B4

secondary

#CF7B56

accent

#6E32F6

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A0F13

muted

#7C7F82

Preview Lab

Preview with #1583B4

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

Preview Lab → · Contrast checker → · Palette generator →