#2579B2#2579B2

#2579B2 is a mid, moderate cyan. Relative luminance 0.173; OKLCH L 55.4% C 0.118 H 243.4°. Best body text is #FFFFFF at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#2579B2
RGB	rgb(37, 121, 178)
HSL	hsl(204, 66%, 42%)
HSV	hsv(204, 79%, 70%)
CMYK	cmyk(79.2%, 32%, 0%, 30.2%)
CIE-LAB	lab(48.61, -4.55, -37.16)
CIE-LCH	lch(48.61, 37.44, 263.02°)
OKLab	oklab(55.43% -0.0529 -0.1054)
OKLCH	oklch(55.43% 0.118 243.4)
XYZ	xyz(15.6331, 17.2805, 44.6224)
Luminance	0.1728 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2579B2 #B25E25

analogous

#25B2A4 #2579B2 #2533B2

triadic

#2579B2 #B22579 #79B225

tetradic

#2579B2 #A425B2 #B25E25 #33B225

square

#2579B2 #A425B2 #B25E25 #33B225

split-complementary

#2579B2 #B22533 #B2A425

monochromatic

#10344D #1A577F #2579B2 #3D99D7 #70B4E1

Accessibility & contrast

On white

4.71

#2579B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#2579B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2579B2

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2579B2	#FFFFFF	#000000	##FFFFFF
##2579B2	1.00	4.71	4.46	4.71
#FFFFFF	4.71	1.00	21.00	1.00
#000000	4.46	21.00	1.00	21.00
##FFFFFF	4.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E7BB4

Deuteranopia (green-blind)

#4B6EB1

Tritanopia (blue-blind)

#00878D

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #2579b2;
/* rgb */ color: rgb(37, 121, 178);
/* oklch */ color: oklch(55.4% 0.118 243.4);

Tailwind

colors: {
  custom: {
    50: '#769fc9',
    500: '#2579b2',
    950: '#000000',
  },
}

SCSS

$custom: #2579b2;
$custom-light: #769fc9;
$custom-dark: #000000;

JSON

{
  "hex": "#2579b2",
  "rgb": {
    "r": 37,
    "g": 121,
    "b": 178
  },
  "hsl": {
    "h": 204.255,
    "s": 65.581,
    "l": 42.157
  },
  "oklch": {
    "l": 0.55427,
    "c": 0.11797,
    "h": 243.4
  },
  "luminance": 0.17282
}

Semantic roles & 50–950 ramp

primary

#2579B2

secondary

#C8906B

accent

#843FE9

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #2579B2

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

Preview Lab → · Contrast checker → · Palette generator →