#577DB5#577DB5

#577DB5 is a mid, moderate blue. Relative luminance 0.200; OKLCH L 58.6% C 0.097 H 257.9°. Best body text is #000000 at 5.01:1 contrast (WCAG AA passes).

Color values

HEX	#577DB5
RGB	rgb(87, 125, 181)
HSL	hsl(216, 39%, 53%)
HSV	hsv(216, 52%, 71%)
CMYK	cmyk(51.9%, 30.9%, 0%, 29%)
CIE-LAB	lab(51.87, 2.87, -33.64)
CIE-LCH	lch(51.87, 33.76, 274.87°)
OKLab	oklab(58.57% -0.0202 -0.0945)
OKLCH	oklch(58.57% 0.097 257.9)
XYZ	xyz(19.6017, 20.0282, 46.5400)
Luminance	0.2003 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577DB5 #B58F57

analogous

#57ACB5 #577DB5 #6057B5

triadic

#577DB5 #B5577D #7DB557

tetradic

#577DB5 #B557AC #B58F57 #57B560

square

#577DB5 #B557AC #B58F57 #57B560

split-complementary

#577DB5 #B56057 #ACB557

monochromatic

#2D4365 #3F6090 #577DB5 #819EC8 #ACBFDA

Accessibility & contrast

On white

4.19

#577DB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.01

#577DB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577DB5

5.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577DB5	#FFFFFF	#000000	##000000
##577DB5	1.00	4.19	5.01	5.01
#FFFFFF	4.19	1.00	21.00	21.00
#000000	5.01	21.00	1.00	1.00
##000000	5.01	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6781B7

Deuteranopia (green-blind)

#5C78B4

Tritanopia (blue-blind)

#288991

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #577db5;
/* rgb */ color: rgb(87, 125, 181);
/* oklch */ color: oklch(58.6% 0.097 257.9);

Tailwind

colors: {
  custom: {
    50: '#8ca2cb',
    500: '#577db5',
    950: '#000000',
  },
}

SCSS

$custom: #577db5;
$custom-light: #8ca2cb;
$custom-dark: #000000;

JSON

{
  "hex": "#577db5",
  "rgb": {
    "r": 87,
    "g": 125,
    "b": 181
  },
  "hsl": {
    "h": 215.745,
    "s": 38.843,
    "l": 52.549
  },
  "oklch": {
    "l": 0.58567,
    "c": 0.09669,
    "h": 257.9
  },
  "luminance": 0.2003
}

Semantic roles & 50–950 ramp

primary

#577DB5

secondary

#C8B89F

accent

#9F59CF

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0F13

muted

#7D7E82

Preview Lab

Preview with #577DB5

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

Preview Lab → · Contrast checker → · Palette generator →