#2579B1#2579B1

#2579B1 is a mid, moderate cyan. Relative luminance 0.172; OKLCH L 55.4% C 0.117 H 242.9°. Best body text is #FFFFFF at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#2579B1
RGB	rgb(37, 121, 177)
HSL	hsl(204, 65%, 42%)
HSV	hsv(204, 79%, 69%)
CMYK	cmyk(79.1%, 31.6%, 0%, 30.6%)
CIE-LAB	lab(48.56, -4.92, -36.66)
CIE-LCH	lch(48.56, 36.99, 262.36°)
OKLab	oklab(55.37% -0.0532 -0.104)
OKLCH	oklch(55.37% 0.117 242.9)
XYZ	xyz(15.5330, 17.2405, 44.0955)
Luminance	0.1724 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2579B1 #B15D25

analogous

#25B1A3 #2579B1 #2533B1

triadic

#2579B1 #B12579 #79B125

tetradic

#2579B1 #A325B1 #B15D25 #33B125

square

#2579B1 #A325B1 #B15D25 #33B125

split-complementary

#2579B1 #B12533 #B1A325

monochromatic

#10344C #1A567E #2579B1 #3D99D6 #6FB4E1

Accessibility & contrast

On white

4.72

#2579B1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.45

#2579B1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2579B1

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2579B1	#FFFFFF	#000000	##FFFFFF
##2579B1	1.00	4.72	4.45	4.72
#FFFFFF	4.72	1.00	21.00	1.00
#000000	4.45	21.00	1.00	21.00
##FFFFFF	4.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F7AB3

Deuteranopia (green-blind)

#4B6EB0

Tritanopia (blue-blind)

#00878D

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #2579b1;
/* rgb */ color: rgb(37, 121, 177);
/* oklch */ color: oklch(55.4% 0.117 242.9);

Tailwind

colors: {
  custom: {
    50: '#759fc8',
    500: '#2579b1',
    950: '#000000',
  },
}

SCSS

$custom: #2579b1;
$custom-light: #759fc8;
$custom-dark: #000000;

JSON

{
  "hex": "#2579b1",
  "rgb": {
    "r": 37,
    "g": 121,
    "b": 177
  },
  "hsl": {
    "h": 204,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.55371,
    "c": 0.1168,
    "h": 242.9
  },
  "luminance": 0.17242
}

Semantic roles & 50–950 ramp

primary

#2579B1

secondary

#C8906A

accent

#833FE8

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #2579B1

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

Preview Lab → · Contrast checker → · Palette generator →