#577EBC#577EBC

#577EBC is a mid, moderate blue. Relative luminance 0.206; OKLCH L 59.2% C 0.105 H 259.4°. Best body text is #000000 at 5.12:1 contrast (WCAG AA passes).

Color values

HEX	#577EBC
RGB	rgb(87, 126, 188)
HSL	hsl(217, 43%, 54%)
HSV	hsv(217, 54%, 74%)
CMYK	cmyk(53.7%, 33%, 0%, 26.3%)
CIE-LAB	lab(52.48, 4.50, -36.70)
CIE-LCH	lch(52.48, 36.97, 276.98°)
OKLab	oklab(59.16% -0.0194 -0.1034)
OKLCH	oklch(59.16% 0.105 259.4)
XYZ	xyz(20.4653, 20.5772, 50.4606)
Luminance	0.2058 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577EBC #BC9557

analogous

#57B1BC #577EBC #6357BC

triadic

#577EBC #BC577E #7EBC57

tetradic

#577EBC #BC57B1 #BC9557 #57BC63

square

#577EBC #BC57B1 #BC9557 #57BC63

split-complementary

#577EBC #BC6357 #B1BC57

monochromatic

#2C456D #3D6099 #577EBC #83A0CD #AFC1DF

Accessibility & contrast

On white

4.10

#577EBC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.12

#577EBC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577EBC

5.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577EBC	#FFFFFF	#000000	##000000
##577EBC	1.00	4.10	5.12	5.12
#FFFFFF	4.10	1.00	21.00	21.00
#000000	5.12	21.00	1.00	1.00
##000000	5.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6582BF

Deuteranopia (green-blind)

#5979BB

Tritanopia (blue-blind)

#1F8C94

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #577ebc;
/* rgb */ color: rgb(87, 126, 188);
/* oklch */ color: oklch(59.2% 0.105 259.4);

Tailwind

colors: {
  custom: {
    50: '#8da3d0',
    500: '#577ebc',
    950: '#000000',
  },
}

SCSS

$custom: #577ebc;
$custom-light: #8da3d0;
$custom-dark: #000000;

JSON

{
  "hex": "#577ebc",
  "rgb": {
    "r": 87,
    "g": 126,
    "b": 188
  },
  "hsl": {
    "h": 216.832,
    "s": 42.979,
    "l": 53.922
  },
  "oklch": {
    "l": 0.59155,
    "c": 0.10522,
    "h": 259.4
  },
  "luminance": 0.20579
}

Semantic roles & 50–950 ramp

primary

#577EBC

secondary

#CDBCA2

accent

#A255D3

background

#F9FAFC

surface

#F1F3F9

border

#CBCDD2

text

#0D0F14

muted

#7E7F82

Preview Lab

Preview with #577EBC

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

Preview Lab → · Contrast checker → · Palette generator →