#2579B0#2579B0

#2579B0 is a mid, moderate cyan. Relative luminance 0.172; OKLCH L 55.3% C 0.116 H 242.4°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#2579B0
RGB	rgb(37, 121, 176)
HSL	hsl(204, 65%, 42%)
HSV	hsv(204, 79%, 69%)
CMYK	cmyk(79%, 31.3%, 0%, 31%)
CIE-LAB	lab(48.51, -5.29, -36.16)
CIE-LCH	lch(48.51, 36.54, 261.68°)
OKLab	oklab(55.32% -0.0535 -0.1025)
OKLCH	oklch(55.32% 0.116 242.4)
XYZ	xyz(15.4337, 17.2008, 43.5725)
Luminance	0.1720 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2579B0 #B05C25

analogous

#25B0A2 #2579B0 #2534B0

triadic

#2579B0 #B02579 #79B025

tetradic

#2579B0 #A225B0 #B05C25 #34B025

square

#2579B0 #A225B0 #B05C25 #34B025

split-complementary

#2579B0 #B02534 #B0A225

monochromatic

#10334B #1A567D #2579B0 #3C99D6 #6FB4E1

Accessibility & contrast

On white

4.73

#2579B0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#2579B0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2579B0

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2579B0	#FFFFFF	#000000	##FFFFFF
##2579B0	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F7AB2

Deuteranopia (green-blind)

#4C6DAF

Tritanopia (blue-blind)

#00878C

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #2579b0;
/* rgb */ color: rgb(37, 121, 176);
/* oklch */ color: oklch(55.3% 0.116 242.4);

Tailwind

colors: {
  custom: {
    50: '#759fc8',
    500: '#2579b0',
    950: '#000000',
  },
}

SCSS

$custom: #2579b0;
$custom-light: #759fc8;
$custom-dark: #000000;

JSON

{
  "hex": "#2579b0",
  "rgb": {
    "r": 37,
    "g": 121,
    "b": 176
  },
  "hsl": {
    "h": 203.741,
    "s": 65.258,
    "l": 41.765
  },
  "oklch": {
    "l": 0.55315,
    "c": 0.11565,
    "h": 242.4
  },
  "luminance": 0.17203
}

Semantic roles & 50–950 ramp

primary

#2579B0

secondary

#C78F6A

accent

#8240E8

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #2579B0

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

Preview Lab → · Contrast checker → · Palette generator →