#577AB5#577AB5

#577AB5 is a mid, moderate blue. Relative luminance 0.193; OKLCH L 57.9% C 0.100 H 260.4°. Best body text is #000000 at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#577AB5
RGB	rgb(87, 122, 181)
HSL	hsl(218, 39%, 53%)
HSV	hsv(218, 52%, 71%)
CMYK	cmyk(51.9%, 32.6%, 0%, 29%)
CIE-LAB	lab(51.01, 4.67, -34.98)
CIE-LCH	lch(51.01, 35.29, 277.60°)
OKLab	oklab(57.9% -0.0166 -0.0984)
OKLCH	oklch(57.9% 0.1 260.4)
XYZ	xyz(19.2277, 19.2801, 46.4153)
Luminance	0.1928 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577AB5 #B59257

analogous

#57A9B5 #577AB5 #6357B5

triadic

#577AB5 #B5577A #7AB557

tetradic

#577AB5 #B557A9 #B59257 #57B563

square

#577AB5 #B557A9 #B59257 #57B563

split-complementary

#577AB5 #B56357 #A9B557

monochromatic

#2D4265 #3F5D90 #577AB5 #819CC8 #ACBDDA

Accessibility & contrast

On white

4.32

#577AB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.86

#577AB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577AB5

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577AB5	#FFFFFF	#000000	##000000
##577AB5	1.00	4.32	4.86	4.86
#FFFFFF	4.32	1.00	21.00	21.00
#000000	4.86	21.00	1.00	1.00
##000000	4.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#637EB7

Deuteranopia (green-blind)

#5875B4

Tritanopia (blue-blind)

#29878F

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #577ab5;
/* rgb */ color: rgb(87, 122, 181);
/* oklch */ color: oklch(57.9% 0.100 260.4);

Tailwind

colors: {
  custom: {
    50: '#8ca0cb',
    500: '#577ab5',
    950: '#000000',
  },
}

SCSS

$custom: #577ab5;
$custom-light: #8ca0cb;
$custom-dark: #000000;

JSON

{
  "hex": "#577ab5",
  "rgb": {
    "r": 87,
    "g": 122,
    "b": 181
  },
  "hsl": {
    "h": 217.66,
    "s": 38.843,
    "l": 52.549
  },
  "oklch": {
    "l": 0.579,
    "c": 0.09984,
    "h": 260.4
  },
  "luminance": 0.19281
}

Semantic roles & 50–950 ramp

primary

#577AB5

secondary

#C8B99F

accent

#A359CF

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #577AB5

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

Preview Lab → · Contrast checker → · Palette generator →