#577BB3#577BB3

#577BB3 is a mid, moderate blue. Relative luminance 0.194; OKLCH L 58.0% C 0.096 H 259.0°. Best body text is #000000 at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#577BB3
RGB	rgb(87, 123, 179)
HSL	hsl(217, 38%, 52%)
HSV	hsv(217, 51%, 70%)
CMYK	cmyk(51.4%, 31.3%, 0%, 29.8%)
CIE-LAB	lab(51.20, 3.43, -33.53)
CIE-LCH	lch(51.20, 33.70, 275.85°)
OKLab	oklab(58.02% -0.0184 -0.0942)
OKLCH	oklch(58.02% 0.096 259)
XYZ	xyz(19.1474, 19.4454, 45.3835)
Luminance	0.1945 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BB3 #B38F57

analogous

#57A9B3 #577BB3 #6157B3

triadic

#577BB3 #B3577B #7BB357

tetradic

#577BB3 #B357A9 #B38F57 #57B361

square

#577BB3 #B357A9 #B38F57 #57B361

split-complementary

#577BB3 #B36157 #A9B357

monochromatic

#2D4263 #405E8D #577BB3 #819CC6 #ABBDD9

Accessibility & contrast

On white

4.30

#577BB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.89

#577BB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BB3

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BB3	#FFFFFF	#000000	##000000
##577BB3	1.00	4.30	4.89	4.89
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.89	21.00	1.00	1.00
##000000	4.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#657FB5

Deuteranopia (green-blind)

#5A76B2

Tritanopia (blue-blind)

#2B878F

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #577bb3;
/* rgb */ color: rgb(87, 123, 179);
/* oklch */ color: oklch(58.0% 0.096 259.0);

Tailwind

colors: {
  custom: {
    50: '#8ca0ca',
    500: '#577bb3',
    950: '#000000',
  },
}

SCSS

$custom: #577bb3;
$custom-light: #8ca0ca;
$custom-dark: #000000;

JSON

{
  "hex": "#577bb3",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 179
  },
  "hsl": {
    "h": 216.522,
    "s": 37.705,
    "l": 52.157
  },
  "oklch": {
    "l": 0.58018,
    "c": 0.096,
    "h": 259
  },
  "luminance": 0.19447
}

Semantic roles & 50–950 ramp

primary

#577BB3

secondary

#C7B79F

accent

#A05ACE

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #577BB3

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

Preview Lab → · Contrast checker → · Palette generator →