#577CB1#577CB1

#577CB1 is a mid, moderate blue. Relative luminance 0.196; OKLCH L 58.1% C 0.092 H 257.4°. Best body text is #000000 at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#577CB1
RGB	rgb(87, 124, 177)
HSL	hsl(215, 37%, 52%)
HSV	hsv(215, 51%, 69%)
CMYK	cmyk(50.8%, 29.9%, 0%, 30.6%)
CIE-LAB	lab(51.40, 2.21, -32.07)
CIE-LCH	lch(51.40, 32.15, 273.94°)
OKLab	oklab(58.14% -0.0202 -0.09)
OKLCH	oklch(58.14% 0.092 257.4)
XYZ	xyz(19.0713, 19.6145, 44.3675)
Luminance	0.1962 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CB1 #B18C57

analogous

#57A9B1 #577CB1 #5F57B1

triadic

#577CB1 #B1577C #7CB157

tetradic

#577CB1 #B157A9 #B18C57 #57B15F

square

#577CB1 #B157A9 #B18C57 #57B15F

split-complementary

#577CB1 #B15F57 #A9B157

monochromatic

#2D4261 #405F8A #577CB1 #819DC4 #ABBDD8

Accessibility & contrast

On white

4.27

#577CB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.92

#577CB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CB1

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CB1	#FFFFFF	#000000	##000000
##577CB1	1.00	4.27	4.92	4.92
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.92	21.00	1.00	1.00
##000000	4.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#677FB3

Deuteranopia (green-blind)

#5D77B0

Tritanopia (blue-blind)

#2C888F

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #577cb1;
/* rgb */ color: rgb(87, 124, 177);
/* oklch */ color: oklch(58.1% 0.092 257.4);

Tailwind

colors: {
  custom: {
    50: '#8ca1c8',
    500: '#577cb1',
    950: '#000000',
  },
}

SCSS

$custom: #577cb1;
$custom-light: #8ca1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#577cb1",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 177
  },
  "hsl": {
    "h": 215.333,
    "s": 36.585,
    "l": 51.765
  },
  "oklch": {
    "l": 0.58139,
    "c": 0.09224,
    "h": 257.4
  },
  "luminance": 0.19616
}

Semantic roles & 50–950 ramp

primary

#577CB1

secondary

#C6B59E

accent

#9E5BCD

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0F13

muted

#7D7E82

Preview Lab

Preview with #577CB1

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

Preview Lab → · Contrast checker → · Palette generator →