#577BB6#577BB6

#577BB6 is a mid, moderate blue. Relative luminance 0.196; OKLCH L 58.2% C 0.100 H 259.9°. Best body text is #000000 at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#577BB6
RGB	rgb(87, 123, 182)
HSL	hsl(217, 39%, 53%)
HSV	hsv(217, 52%, 71%)
CMYK	cmyk(52.2%, 32.4%, 0%, 28.6%)
CIE-LAB	lab(51.35, 4.38, -35.04)
CIE-LCH	lch(51.35, 35.31, 277.13°)
OKLab	oklab(58.17% -0.0175 -0.0986)
OKLCH	oklch(58.17% 0.1 259.9)
XYZ	xyz(19.4541, 19.5681, 46.9988)
Luminance	0.1957 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BB6 #B69257

analogous

#57AAB6 #577BB6 #6257B6

triadic

#577BB6 #B6577B #7BB657

tetradic

#577BB6 #B657AA #B69257 #57B662

square

#577BB6 #B657AA #B69257 #57B662

split-complementary

#577BB6 #B66257 #AAB657

monochromatic

#2C4266 #3F5E91 #577BB6 #829DC9 #ACBEDB

Accessibility & contrast

On white

4.27

#577BB6 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.91

#577BB6 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BB6

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BB6	#FFFFFF	#000000	##000000
##577BB6	1.00	4.27	4.91	4.91
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.91	21.00	1.00	1.00
##000000	4.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#647FB8

Deuteranopia (green-blind)

#5976B5

Tritanopia (blue-blind)

#288890

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #577bb6;
/* rgb */ color: rgb(87, 123, 182);
/* oklch */ color: oklch(58.2% 0.100 259.9);

Tailwind

colors: {
  custom: {
    50: '#8ca0cc',
    500: '#577bb6',
    950: '#000000',
  },
}

SCSS

$custom: #577bb6;
$custom-light: #8ca0cc;
$custom-dark: #000000;

JSON

{
  "hex": "#577bb6",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 182
  },
  "hsl": {
    "h": 217.263,
    "s": 39.419,
    "l": 52.745
  },
  "oklch": {
    "l": 0.58174,
    "c": 0.10015,
    "h": 259.9
  },
  "luminance": 0.1957
}

Semantic roles & 50–950 ramp

primary

#577BB6

secondary

#C9B9A0

accent

#A258CF

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0D0E13

muted

#7D7E82

Preview Lab

Preview with #577BB6

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

Preview Lab → · Contrast checker → · Palette generator →