#577DB9#577DB9

#577DB9 is a mid, moderate blue. Relative luminance 0.202; OKLCH L 58.8% C 0.102 H 259.2°. Best body text is #000000 at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#577DB9
RGB	rgb(87, 125, 185)
HSL	hsl(217, 41%, 53%)
HSV	hsv(217, 53%, 73%)
CMYK	cmyk(53%, 32.4%, 0%, 27.5%)
CIE-LAB	lab(52.06, 4.14, -35.65)
CIE-LCH	lch(52.06, 35.89, 276.62°)
OKLab	oklab(58.78% -0.0191 -0.1004)
OKLCH	oklch(58.78% 0.102 259.2)
XYZ	xyz(20.0181, 20.1948, 48.7326)
Luminance	0.2020 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577DB9 #B99357

analogous

#57AEB9 #577DB9 #6257B9

triadic

#577DB9 #B9577D #7DB957

tetradic

#577DB9 #B957AE #B99357 #57B962

square

#577DB9 #B957AE #B99357 #57B962

split-complementary

#577DB9 #B96257 #AEB957

monochromatic

#2C446A #3E6095 #577DB9 #829ECB #ADC0DD

Accessibility & contrast

On white

4.17

#577DB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.04

#577DB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577DB9

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577DB9	#FFFFFF	#000000	##000000
##577DB9	1.00	4.17	5.04	5.04
#FFFFFF	4.17	1.00	21.00	21.00
#000000	5.04	21.00	1.00	1.00
##000000	5.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6581BC

Deuteranopia (green-blind)

#5978B8

Tritanopia (blue-blind)

#238A93

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #577db9;
/* rgb */ color: rgb(87, 125, 185);
/* oklch */ color: oklch(58.8% 0.102 259.2);

Tailwind

colors: {
  custom: {
    50: '#8da2ce',
    500: '#577db9',
    950: '#000000',
  },
}

SCSS

$custom: #577db9;
$custom-light: #8da2ce;
$custom-dark: #000000;

JSON

{
  "hex": "#577db9",
  "rgb": {
    "r": 87,
    "g": 125,
    "b": 185
  },
  "hsl": {
    "h": 216.735,
    "s": 41.176,
    "l": 53.333
  },
  "oklch": {
    "l": 0.58775,
    "c": 0.10217,
    "h": 259.2
  },
  "luminance": 0.20196
}

Semantic roles & 50–950 ramp

primary

#577DB9

secondary

#CBBBA1

accent

#A257D1

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0D0F13

muted

#7D7E82

Preview Lab

Preview with #577DB9

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

Preview Lab → · Contrast checker → · Palette generator →