#577BB2#577BB2

#577BB2 is a mid, moderate blue. Relative luminance 0.194; OKLCH L 58.0% C 0.095 H 258.6°. Best body text is #000000 at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#577BB2
RGB	rgb(87, 123, 178)
HSL	hsl(216, 37%, 52%)
HSV	hsv(216, 51%, 70%)
CMYK	cmyk(51.1%, 30.9%, 0%, 30.2%)
CIE-LAB	lab(51.16, 3.12, -33.02)
CIE-LCH	lch(51.16, 33.17, 275.40°)
OKLab	oklab(57.97% -0.0186 -0.0928)
OKLCH	oklch(57.97% 0.095 258.6)
XYZ	xyz(19.0466, 19.4051, 44.8527)
Luminance	0.1941 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BB2 #B28E57

analogous

#57A9B2 #577BB2 #6157B2

triadic

#577BB2 #B2577B #7BB257

tetradic

#577BB2 #B257A9 #B28E57 #57B261

square

#577BB2 #B257A9 #B28E57 #57B261

split-complementary

#577BB2 #B26157 #A9B257

monochromatic

#2D4262 #405E8C #577BB2 #819CC5 #ABBDD8

Accessibility & contrast

On white

4.30

#577BB2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.88

#577BB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BB2

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BB2	#FFFFFF	#000000	##000000
##577BB2	1.00	4.30	4.88	4.88
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.88	21.00	1.00	1.00
##000000	4.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#667FB4

Deuteranopia (green-blind)

#5B76B1

Tritanopia (blue-blind)

#2C878F

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #577bb2;
/* rgb */ color: rgb(87, 123, 178);
/* oklch */ color: oklch(58.0% 0.095 258.6);

Tailwind

colors: {
  custom: {
    50: '#8ca0c9',
    500: '#577bb2',
    950: '#000000',
  },
}

SCSS

$custom: #577bb2;
$custom-light: #8ca0c9;
$custom-dark: #000000;

JSON

{
  "hex": "#577bb2",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 178
  },
  "hsl": {
    "h": 216.264,
    "s": 37.143,
    "l": 51.961
  },
  "oklch": {
    "l": 0.57966,
    "c": 0.09463,
    "h": 258.6
  },
  "luminance": 0.19407
}

Semantic roles & 50–950 ramp

primary

#577BB2

secondary

#C6B79E

accent

#A05BCD

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #577BB2

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

Preview Lab → · Contrast checker → · Palette generator →