#577AB1#577AB1

#577AB1 is a mid, moderate blue. Relative luminance 0.191; OKLCH L 57.7% C 0.094 H 259.2°. Best body text is #000000 at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#577AB1
RGB	rgb(87, 122, 177)
HSL	hsl(217, 37%, 52%)
HSV	hsv(217, 51%, 69%)
CMYK	cmyk(50.8%, 31.1%, 0%, 30.6%)
CIE-LAB	lab(50.83, 3.40, -32.97)
CIE-LCH	lch(50.83, 33.14, 275.89°)
OKLab	oklab(57.69% -0.0177 -0.0926)
OKLCH	oklch(57.69% 0.094 259.2)
XYZ	xyz(18.8232, 19.1183, 44.2848)
Luminance	0.1912 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577AB1 #B18E57

analogous

#57A7B1 #577AB1 #6157B1

triadic

#577AB1 #B1577A #7AB157

tetradic

#577AB1 #B157A7 #B18E57 #57B161

square

#577AB1 #B157A7 #B18E57 #57B161

split-complementary

#577AB1 #B16157 #A7B157

monochromatic

#2D4161 #405D8A #577AB1 #819BC4 #ABBCD8

Accessibility & contrast

On white

4.35

#577AB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.82

#577AB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577AB1

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577AB1	#FFFFFF	#000000	##000000
##577AB1	1.00	4.35	4.82	4.82
#FFFFFF	4.35	1.00	21.00	21.00
#000000	4.82	21.00	1.00	1.00
##000000	4.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#657EB3

Deuteranopia (green-blind)

#5A75B0

Tritanopia (blue-blind)

#2D868E

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #577ab1;
/* rgb */ color: rgb(87, 122, 177);
/* oklch */ color: oklch(57.7% 0.094 259.2);

Tailwind

colors: {
  custom: {
    50: '#8ca0c8',
    500: '#577ab1',
    950: '#000000',
  },
}

SCSS

$custom: #577ab1;
$custom-light: #8ca0c8;
$custom-dark: #000000;

JSON

{
  "hex": "#577ab1",
  "rgb": {
    "r": 87,
    "g": 122,
    "b": 177
  },
  "hsl": {
    "h": 216.667,
    "s": 36.585,
    "l": 51.765
  },
  "oklch": {
    "l": 0.57691,
    "c": 0.09429,
    "h": 259.2
  },
  "luminance": 0.1912
}

Semantic roles & 50–950 ramp

primary

#577AB1

secondary

#C6B69E

accent

#A05BCD

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #577AB1

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

Preview Lab → · Contrast checker → · Palette generator →