#577CB7#577CB7

#577CB7 is a mid, moderate blue. Relative luminance 0.199; OKLCH L 58.4% C 0.100 H 259.4°. Best body text is #000000 at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#577CB7
RGB	rgb(87, 124, 183)
HSL	hsl(217, 40%, 53%)
HSV	hsv(217, 52%, 72%)
CMYK	cmyk(52.5%, 32.2%, 0%, 28.2%)
CIE-LAB	lab(51.68, 4.10, -35.09)
CIE-LCH	lch(51.68, 35.33, 276.66°)
OKLab	oklab(58.45% -0.0184 -0.0988)
OKLCH	oklch(58.45% 0.1 259.4)
XYZ	xyz(19.6825, 19.8590, 47.5865)
Luminance	0.1986 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CB7 #B79257

analogous

#57ACB7 #577CB7 #6257B7

triadic

#577CB7 #B7577C #7CB757

tetradic

#577CB7 #B757AC #B79257 #57B762

square

#577CB7 #B757AC #B79257 #57B762

split-complementary

#577CB7 #B76257 #ACB757

monochromatic

#2C4367 #3F5F92 #577CB7 #829DC9 #ADBFDC

Accessibility & contrast

On white

4.22

#577CB7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.97

#577CB7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CB7

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CB7	#FFFFFF	#000000	##000000
##577CB7	1.00	4.22	4.97	4.97
#FFFFFF	4.22	1.00	21.00	21.00
#000000	4.97	21.00	1.00	1.00
##000000	4.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6580BA

Deuteranopia (green-blind)

#5977B6

Tritanopia (blue-blind)

#268991

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #577cb7;
/* rgb */ color: rgb(87, 124, 183);
/* oklch */ color: oklch(58.4% 0.100 259.4);

Tailwind

colors: {
  custom: {
    50: '#8ca1cd',
    500: '#577cb7',
    950: '#000000',
  },
}

SCSS

$custom: #577cb7;
$custom-light: #8ca1cd;
$custom-dark: #000000;

JSON

{
  "hex": "#577cb7",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 183
  },
  "hsl": {
    "h": 216.875,
    "s": 40,
    "l": 52.941
  },
  "oklch": {
    "l": 0.58448,
    "c": 0.10047,
    "h": 259.4
  },
  "luminance": 0.1986
}

Semantic roles & 50–950 ramp

primary

#577CB7

secondary

#CABAA0

accent

#A258D0

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0D0E13

muted

#7D7E82

Preview Lab

Preview with #577CB7

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

Preview Lab → · Contrast checker → · Palette generator →