#577FB9#577FB9

#577FB9 is a mid, moderate blue. Relative luminance 0.207; OKLCH L 59.2% C 0.100 H 257.6°. Best body text is #000000 at 5.14:1 contrast (WCAG AA passes).

Color values

HEX	#577FB9
RGB	rgb(87, 127, 185)
HSL	hsl(216, 41%, 53%)
HSV	hsv(216, 53%, 73%)
CMYK	cmyk(53%, 31.4%, 0%, 27.5%)
CIE-LAB	lab(52.63, 2.94, -34.75)
CIE-LCH	lch(52.63, 34.88, 274.84°)
OKLab	oklab(59.22% -0.0214 -0.0978)
OKLCH	oklch(59.22% 0.1 257.6)
XYZ	xyz(20.2738, 20.7062, 48.8179)
Luminance	0.2071 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577FB9 #B99157

analogous

#57B0B9 #577FB9 #6057B9

triadic

#577FB9 #B9577F #7FB957

tetradic

#577FB9 #B957B0 #B99157 #57B960

square

#577FB9 #B957B0 #B99157 #57B960

split-complementary

#577FB9 #B96057 #B0B957

monochromatic

#2C456A #3E6195 #577FB9 #82A0CB #ADC1DD

Accessibility & contrast

On white

4.08

#577FB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.14

#577FB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577FB9

5.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577FB9	#FFFFFF	#000000	##000000
##577FB9	1.00	4.08	5.14	5.14
#FFFFFF	4.08	1.00	21.00	21.00
#000000	5.14	21.00	1.00	1.00
##000000	5.14	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6883BB

Deuteranopia (green-blind)

#5C79B8

Tritanopia (blue-blind)

#238C94

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #577fb9;
/* rgb */ color: rgb(87, 127, 185);
/* oklch */ color: oklch(59.2% 0.100 257.6);

Tailwind

colors: {
  custom: {
    50: '#8da3ce',
    500: '#577fb9',
    950: '#000000',
  },
}

SCSS

$custom: #577fb9;
$custom-light: #8da3ce;
$custom-dark: #000000;

JSON

{
  "hex": "#577fb9",
  "rgb": {
    "r": 87,
    "g": 127,
    "b": 185
  },
  "hsl": {
    "h": 215.51,
    "s": 41.176,
    "l": 53.333
  },
  "oklch": {
    "l": 0.5922,
    "c": 0.10009,
    "h": 257.6
  },
  "luminance": 0.20708
}

Semantic roles & 50–950 ramp

primary

#577FB9

secondary

#CBBAA1

accent

#9F57D1

background

#F8FAFC

surface

#F0F3F9

border

#CBCDD2

text

#0D0F13

muted

#7D7F82

Preview Lab

Preview with #577FB9

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

Preview Lab → · Contrast checker → · Palette generator →