#2579BC#2579BC

#2579BC is a mid, vivid cyan. Relative luminance 0.177; OKLCH L 56.0% C 0.130 H 247.4°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#2579BC
RGB	rgb(37, 121, 188)
HSL	hsl(207, 67%, 44%)
HSV	hsv(207, 80%, 74%)
CMYK	cmyk(80.3%, 35.6%, 0%, 26.3%)
CIE-LAB	lab(49.13, -0.82, -42.12)
CIE-LCH	lch(49.13, 42.13, 268.89°)
OKLab	oklab(56% -0.05 -0.1199)
OKLCH	oklch(56% 0.13 247.4)
XYZ	xyz(16.6739, 17.6969, 50.1042)
Luminance	0.1770 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2579BC #BC6825

analogous

#25BCB4 #2579BC #252DBC

triadic

#2579BC #BC2579 #79BC25

tetradic

#2579BC #B425BC #BC6825 #2DBC25

square

#2579BC #B425BC #BC6825 #2DBC25

split-complementary

#2579BC #BC252D #BCB425

monochromatic

#113756 #1B5889 #2579BC #4498DA #77B4E4

Accessibility & contrast

On white

4.63

#2579BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#2579BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #2579BC

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2579BC	#FFFFFF	#000000	##FFFFFF
##2579BC	1.00	4.63	4.54	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#597CBF

Deuteranopia (green-blind)

#436FBB

Tritanopia (blue-blind)

#008991

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #2579bc;
/* rgb */ color: rgb(37, 121, 188);
/* oklch */ color: oklch(56.0% 0.130 247.4);

Tailwind

colors: {
  custom: {
    50: '#789fd0',
    500: '#2579bc',
    950: '#000000',
  },
}

SCSS

$custom: #2579bc;
$custom-light: #789fd0;
$custom-dark: #000000;

JSON

{
  "hex": "#2579bc",
  "rgb": {
    "r": 37,
    "g": 121,
    "b": 188
  },
  "hsl": {
    "h": 206.623,
    "s": 67.111,
    "l": 44.118
  },
  "oklch": {
    "l": 0.56001,
    "c": 0.12995,
    "h": 247.4
  },
  "luminance": 0.17699
}

Semantic roles & 50–950 ramp

primary

#2579BC

secondary

#CC9971

accent

#8A3EEA

background

#F7F9FC

surface

#EEF2F9

border

#C9CCD2

text

#0A0E14

muted

#7C7E82

Preview Lab

Preview with #2579BC

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

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