#577CCC#577CCC

#577CCC is a mid, vivid blue. Relative luminance 0.208; OKLCH L 59.6% C 0.130 H 264.1°. Best body text is #000000 at 5.16:1 contrast (WCAG AA passes).

Color values

HEX	#577CCC
RGB	rgb(87, 124, 204)
HSL	hsl(221, 53%, 57%)
HSV	hsv(221, 57%, 80%)
CMYK	cmyk(57.4%, 39.2%, 0%, 20%)
CIE-LAB	lab(52.73, 10.90, -45.44)
CIE-LCH	lch(52.73, 46.73, 283.49°)
OKLab	oklab(59.61% -0.0133 -0.1289)
OKLCH	oklch(59.61% 0.13 264.1)
XYZ	xyz(22.0335, 20.7994, 59.9686)
Luminance	0.2080 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CCC #CCA757

analogous

#57B6CC #577CCC #6D57CC

triadic

#577CCC #CC577C #7CCC57

tetradic

#577CCC #CC57B6 #CCA757 #57CC6D

square

#577CCC #CC57B6 #CCA757 #57CC6D

split-complementary

#577CCC #CC6D57 #B6CC57

monochromatic

#274481 #365CB0 #577CCC #86A1DA #B5C5E9

Accessibility & contrast

On white

4.07

#577CCC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.16

#577CCC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CCC

5.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CCC	#FFFFFF	#000000	##000000
##577CCC	1.00	4.07	5.16	5.16
#FFFFFF	4.07	1.00	21.00	21.00
#000000	5.16	21.00	1.00	1.00
##000000	5.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A84CF

Deuteranopia (green-blind)

#4B79CA

Tritanopia (blue-blind)

#008E9A

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #577ccc;
/* rgb */ color: rgb(87, 124, 204);
/* oklch */ color: oklch(59.6% 0.130 264.1);

Tailwind

colors: {
  custom: {
    50: '#8fa1dc',
    500: '#577ccc',
    950: '#000000',
  },
}

SCSS

$custom: #577ccc;
$custom-light: #8fa1dc;
$custom-dark: #000000;

JSON

{
  "hex": "#577ccc",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 204
  },
  "hsl": {
    "h": 221.026,
    "s": 53.425,
    "l": 57.059
  },
  "oklch": {
    "l": 0.59609,
    "c": 0.12962,
    "h": 264.1
  },
  "luminance": 0.20801
}

Semantic roles & 50–950 ramp

primary

#577CCC

secondary

#D7C8A8

accent

#AF4BDD

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #577CCC

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

Preview Lab → · Contrast checker → · Palette generator →