#577EB9#577EB9

#577EB9 is a mid, moderate blue. Relative luminance 0.205; OKLCH L 59.0% C 0.101 H 258.4°. Best body text is #000000 at 5.09:1 contrast (WCAG AA passes).

Color values

HEX	#577EB9
RGB	rgb(87, 126, 185)
HSL	hsl(216, 41%, 53%)
HSV	hsv(216, 53%, 73%)
CMYK	cmyk(53%, 31.9%, 0%, 27.5%)
CIE-LAB	lab(52.34, 3.54, -35.20)
CIE-LCH	lch(52.34, 35.38, 275.74°)
OKLab	oklab(59% -0.0203 -0.0991)
OKLCH	oklch(59% 0.101 258.4)
XYZ	xyz(20.1453, 20.4492, 48.7750)
Luminance	0.2045 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577EB9 #B99257

analogous

#57AFB9 #577EB9 #6157B9

triadic

#577EB9 #B9577E #7EB957

tetradic

#577EB9 #B957AF #B99257 #57B961

square

#577EB9 #B957AF #B99257 #57B961

split-complementary

#577EB9 #B96157 #AFB957

monochromatic

#2C456A #3E6195 #577EB9 #829FCB #ADC0DD

Accessibility & contrast

On white

4.13

#577EB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.09

#577EB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577EB9

5.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577EB9	#FFFFFF	#000000	##000000
##577EB9	1.00	4.13	5.09	5.09
#FFFFFF	4.13	1.00	21.00	21.00
#000000	5.09	21.00	1.00	1.00
##000000	5.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6782BC

Deuteranopia (green-blind)

#5B79B8

Tritanopia (blue-blind)

#238B93

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #577eb9;
/* rgb */ color: rgb(87, 126, 185);
/* oklch */ color: oklch(59.0% 0.101 258.4);

Tailwind

colors: {
  custom: {
    50: '#8da3ce',
    500: '#577eb9',
    950: '#000000',
  },
}

SCSS

$custom: #577eb9;
$custom-light: #8da3ce;
$custom-dark: #000000;

JSON

{
  "hex": "#577eb9",
  "rgb": {
    "r": 87,
    "g": 126,
    "b": 185
  },
  "hsl": {
    "h": 216.122,
    "s": 41.176,
    "l": 53.333
  },
  "oklch": {
    "l": 0.58997,
    "c": 0.10112,
    "h": 258.4
  },
  "luminance": 0.20451
}

Semantic roles & 50–950 ramp

primary

#577EB9

secondary

#CBBAA1

accent

#A057D1

background

#F8FAFC

surface

#F0F3F9

border

#CBCDD2

text

#0D0F13

muted

#7D7F82

Preview Lab

Preview with #577EB9

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

Preview Lab → · Contrast checker → · Palette generator →