#2577B2#2577B2

#2577B2 is a mid, moderate cyan. Relative luminance 0.168; OKLCH L 54.9% C 0.120 H 244.8°. Best body text is #FFFFFF at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#2577B2
RGB	rgb(37, 119, 178)
HSL	hsl(205, 66%, 42%)
HSV	hsv(205, 79%, 70%)
CMYK	cmyk(79.2%, 33.1%, 0%, 30.2%)
CIE-LAB	lab(48.01, -3.35, -38.11)
CIE-LCH	lch(48.01, 38.26, 264.97°)
OKLab	oklab(54.95% -0.051 -0.1083)
OKLCH	oklch(54.95% 0.12 244.8)
XYZ	xyz(15.3925, 16.7995, 44.5422)
Luminance	0.1680 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2577B2 #B26025

analogous

#25B2A6 #2577B2 #2531B2

triadic

#2577B2 #B22577 #77B225

tetradic

#2577B2 #A625B2 #B26025 #31B225

square

#2577B2 #A625B2 #B26025 #31B225

split-complementary

#2577B2 #B22531 #B2A625

monochromatic

#10334D #1A557F #2577B2 #3D97D7 #70B2E1

Accessibility & contrast

On white

4.82

#2577B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.36

#2577B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2577B2

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2577B2	#FFFFFF	#000000	##FFFFFF
##2577B2	1.00	4.82	4.36	4.82
#FFFFFF	4.82	1.00	21.00	1.00
#000000	4.36	21.00	1.00	21.00
##FFFFFF	4.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B79B5

Deuteranopia (green-blind)

#486CB1

Tritanopia (blue-blind)

#00858C

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #2577b2;
/* rgb */ color: rgb(37, 119, 178);
/* oklch */ color: oklch(54.9% 0.120 244.8);

Tailwind

colors: {
  custom: {
    50: '#759ec9',
    500: '#2577b2',
    950: '#000000',
  },
}

SCSS

$custom: #2577b2;
$custom-light: #759ec9;
$custom-dark: #000000;

JSON

{
  "hex": "#2577b2",
  "rgb": {
    "r": 37,
    "g": 119,
    "b": 178
  },
  "hsl": {
    "h": 205.106,
    "s": 65.581,
    "l": 42.157
  },
  "oklch": {
    "l": 0.54949,
    "c": 0.11969,
    "h": 244.8
  },
  "luminance": 0.16801
}

Semantic roles & 50–950 ramp

primary

#2577B2

secondary

#C8926B

accent

#863FE9

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #2577B2

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

Preview Lab → · Contrast checker → · Palette generator →