#577BB7#577BB7

#577BB7 is a mid, moderate blue. Relative luminance 0.196; OKLCH L 58.2% C 0.102 H 260.2°. Best body text is #000000 at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#577BB7
RGB	rgb(87, 123, 183)
HSL	hsl(218, 40%, 53%)
HSV	hsv(218, 52%, 72%)
CMYK	cmyk(52.5%, 32.8%, 0%, 28.2%)
CIE-LAB	lab(51.39, 4.70, -35.54)
CIE-LCH	lch(51.39, 35.85, 277.53°)
OKLab	oklab(58.23% -0.0173 -0.1001)
OKLCH	oklch(58.23% 0.102 260.2)
XYZ	xyz(19.5578, 19.6096, 47.5450)
Luminance	0.1961 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BB7 #B79357

analogous

#57ABB7 #577BB7 #6357B7

triadic

#577BB7 #B7577B #7BB757

tetradic

#577BB7 #B757AB #B79357 #57B763

square

#577BB7 #B757AB #B79357 #57B763

split-complementary

#577BB7 #B76357 #ABB757

monochromatic

#2C4267 #3F5E92 #577BB7 #829DC9 #ADBEDC

Accessibility & contrast

On white

4.27

#577BB7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.92

#577BB7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BB7

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BB7	#FFFFFF	#000000	##000000
##577BB7	1.00	4.27	4.92	4.92
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.92	21.00	1.00	1.00
##000000	4.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#637FBA

Deuteranopia (green-blind)

#5876B6

Tritanopia (blue-blind)

#268891

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #577bb7;
/* rgb */ color: rgb(87, 123, 183);
/* oklch */ color: oklch(58.2% 0.102 260.2);

Tailwind

colors: {
  custom: {
    50: '#8ca0cd',
    500: '#577bb7',
    950: '#000000',
  },
}

SCSS

$custom: #577bb7;
$custom-light: #8ca0cd;
$custom-dark: #000000;

JSON

{
  "hex": "#577bb7",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 183
  },
  "hsl": {
    "h": 217.5,
    "s": 40,
    "l": 52.941
  },
  "oklch": {
    "l": 0.58227,
    "c": 0.10154,
    "h": 260.2
  },
  "luminance": 0.19611
}

Semantic roles & 50–950 ramp

primary

#577BB7

secondary

#CABAA0

accent

#A358D0

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0D0E13

muted

#7D7E82

Preview Lab

Preview with #577BB7

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

Preview Lab → · Contrast checker → · Palette generator →