#577CBC#577CBC

#577CBC is a mid, moderate blue. Relative luminance 0.201; OKLCH L 58.7% C 0.107 H 260.8°. Best body text is #000000 at 5.01:1 contrast (WCAG AA passes).

Color values

HEX	#577CBC
RGB	rgb(87, 124, 188)
HSL	hsl(218, 43%, 54%)
HSV	hsv(218, 54%, 74%)
CMYK	cmyk(53.7%, 34%, 0%, 26.3%)
CIE-LAB	lab(51.92, 5.70, -37.59)
CIE-LCH	lch(51.92, 38.02, 278.62°)
OKLab	oklab(58.71% -0.0171 -0.106)
OKLCH	oklch(58.71% 0.107 260.8)
XYZ	xyz(20.2121, 20.0709, 50.3762)
Luminance	0.2007 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CBC #BC9757

analogous

#57AFBC #577CBC #6557BC

triadic

#577CBC #BC577C #7CBC57

tetradic

#577CBC #BC57AF #BC9757 #57BC65

square

#577CBC #BC57AF #BC9757 #57BC65

split-complementary

#577CBC #BC6557 #AFBC57

monochromatic

#2C446D #3D5F99 #577CBC #839ECD #AFC0DF

Accessibility & contrast

On white

4.19

#577CBC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.01

#577CBC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CBC

5.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CBC	#FFFFFF	#000000	##000000
##577CBC	1.00	4.19	5.01	5.01
#FFFFFF	4.19	1.00	21.00	21.00
#000000	5.01	21.00	1.00	1.00
##000000	5.01	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6381BF

Deuteranopia (green-blind)

#5677BB

Tritanopia (blue-blind)

#208A93

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #577cbc;
/* rgb */ color: rgb(87, 124, 188);
/* oklch */ color: oklch(58.7% 0.107 260.8);

Tailwind

colors: {
  custom: {
    50: '#8da1d0',
    500: '#577cbc',
    950: '#000000',
  },
}

SCSS

$custom: #577cbc;
$custom-light: #8da1d0;
$custom-dark: #000000;

JSON

{
  "hex": "#577cbc",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 188
  },
  "hsl": {
    "h": 218.02,
    "s": 42.979,
    "l": 53.922
  },
  "oklch": {
    "l": 0.58714,
    "c": 0.10739,
    "h": 260.8
  },
  "luminance": 0.20072
}

Semantic roles & 50–950 ramp

primary

#577CBC

secondary

#CDBDA2

accent

#A555D3

background

#F9F9FC

surface

#F1F2F9

border

#CBCCD2

text

#0D0E14

muted

#7E7E82

Preview Lab

Preview with #577CBC

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

Preview Lab → · Contrast checker → · Palette generator →