#577BB1#577BB1

#577BB1 is a mid, moderate blue. Relative luminance 0.194; OKLCH L 57.9% C 0.093 H 258.3°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#577BB1
RGB	rgb(87, 123, 177)
HSL	hsl(216, 37%, 52%)
HSV	hsv(216, 51%, 69%)
CMYK	cmyk(50.8%, 30.5%, 0%, 30.6%)
CIE-LAB	lab(51.11, 2.81, -32.52)
CIE-LCH	lch(51.11, 32.64, 274.93°)
OKLab	oklab(57.92% -0.0189 -0.0913)
OKLCH	oklch(57.92% 0.093 258.3)
XYZ	xyz(18.9466, 19.3651, 44.3259)
Luminance	0.1937 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BB1 #B18D57

analogous

#57A8B1 #577BB1 #6057B1

triadic

#577BB1 #B1577B #7BB157

tetradic

#577BB1 #B157A8 #B18D57 #57B160

square

#577BB1 #B157A8 #B18D57 #57B160

split-complementary

#577BB1 #B16057 #A8B157

monochromatic

#2D4261 #405E8A #577BB1 #819CC4 #ABBDD8

Accessibility & contrast

On white

4.31

#577BB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#577BB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BB1

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BB1	#FFFFFF	#000000	##000000
##577BB1	1.00	4.31	4.87	4.87
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#667EB3

Deuteranopia (green-blind)

#5B76B0

Tritanopia (blue-blind)

#2D878E

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #577bb1;
/* rgb */ color: rgb(87, 123, 177);
/* oklch */ color: oklch(57.9% 0.093 258.3);

Tailwind

colors: {
  custom: {
    50: '#8ca0c8',
    500: '#577bb1',
    950: '#000000',
  },
}

SCSS

$custom: #577bb1;
$custom-light: #8ca0c8;
$custom-dark: #000000;

JSON

{
  "hex": "#577bb1",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 177
  },
  "hsl": {
    "h": 216,
    "s": 36.585,
    "l": 51.765
  },
  "oklch": {
    "l": 0.57915,
    "c": 0.09325,
    "h": 258.3
  },
  "luminance": 0.19366
}

Semantic roles & 50–950 ramp

primary

#577BB1

secondary

#C6B69E

accent

#9F5BCD

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #577BB1

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

Preview Lab → · Contrast checker → · Palette generator →