#577DB3#577DB3

#577DB3 is a mid, moderate blue. Relative luminance 0.199; OKLCH L 58.5% C 0.094 H 257.2°. Best body text is #000000 at 4.99:1 contrast (WCAG AA passes).

Color values

HEX	#577DB3
RGB	rgb(87, 125, 179)
HSL	hsl(215, 38%, 52%)
HSV	hsv(215, 51%, 70%)
CMYK	cmyk(51.4%, 30.2%, 0%, 29.8%)
CIE-LAB	lab(51.78, 2.24, -32.63)
CIE-LCH	lch(51.78, 32.71, 273.93°)
OKLab	oklab(58.47% -0.0208 -0.0916)
OKLCH	oklch(58.47% 0.094 257.2)
XYZ	xyz(19.3980, 19.9467, 45.4670)
Luminance	0.1995 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577DB3 #B38D57

analogous

#57ABB3 #577DB3 #5F57B3

triadic

#577DB3 #B3577D #7DB357

tetradic

#577DB3 #B357AB #B38D57 #57B35F

square

#577DB3 #B357AB #B38D57 #57B35F

split-complementary

#577DB3 #B35F57 #ABB357

monochromatic

#2D4363 #40608D #577DB3 #819EC6 #ABBED9

Accessibility & contrast

On white

4.21

#577DB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.99

#577DB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577DB3

4.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577DB3	#FFFFFF	#000000	##000000
##577DB3	1.00	4.21	4.99	4.99
#FFFFFF	4.21	1.00	21.00	21.00
#000000	4.99	21.00	1.00	1.00
##000000	4.99	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6880B5

Deuteranopia (green-blind)

#5D77B2

Tritanopia (blue-blind)

#2A8990

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #577db3;
/* rgb */ color: rgb(87, 125, 179);
/* oklch */ color: oklch(58.5% 0.094 257.2);

Tailwind

colors: {
  custom: {
    50: '#8ca2ca',
    500: '#577db3',
    950: '#000000',
  },
}

SCSS

$custom: #577db3;
$custom-light: #8ca2ca;
$custom-dark: #000000;

JSON

{
  "hex": "#577db3",
  "rgb": {
    "r": 87,
    "g": 125,
    "b": 179
  },
  "hsl": {
    "h": 215.217,
    "s": 37.705,
    "l": 52.157
  },
  "oklch": {
    "l": 0.58465,
    "c": 0.09396,
    "h": 257.2
  },
  "luminance": 0.19948
}

Semantic roles & 50–950 ramp

primary

#577DB3

secondary

#C7B69F

accent

#9E5ACE

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0F13

muted

#7D7E82

Preview Lab

Preview with #577DB3

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

Preview Lab → · Contrast checker → · Palette generator →