#577FB8#577FB8

#577FB8 is a mid, moderate blue. Relative luminance 0.207; OKLCH L 59.2% C 0.099 H 257.3°. Best body text is #000000 at 5.13:1 contrast (WCAG AA passes).

Color values

HEX	#577FB8
RGB	rgb(87, 127, 184)
HSL	hsl(215, 41%, 53%)
HSV	hsv(215, 53%, 72%)
CMYK	cmyk(52.7%, 31%, 0%, 27.8%)
CIE-LAB	lab(52.58, 2.63, -34.25)
CIE-LCH	lch(52.58, 34.35, 274.38°)
OKLab	oklab(59.17% -0.0217 -0.0963)
OKLCH	oklch(59.17% 0.099 257.3)
XYZ	xyz(20.1686, 20.6642, 48.2639)
Luminance	0.2067 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577FB8 #B89057

analogous

#57AFB8 #577FB8 #5F57B8

triadic

#577FB8 #B8577F #7FB857

tetradic

#577FB8 #B857AF #B89057 #57B85F

square

#577FB8 #B857AF #B89057 #57B85F

split-complementary

#577FB8 #B85F57 #AFB857

monochromatic

#2C4568 #3E6193 #577FB8 #82A0CA #ADC1DC

Accessibility & contrast

On white

4.09

#577FB8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.13

#577FB8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577FB8

5.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577FB8	#FFFFFF	#000000	##000000
##577FB8	1.00	4.09	5.13	5.13
#FFFFFF	4.09	1.00	21.00	21.00
#000000	5.13	21.00	1.00	1.00
##000000	5.13	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6883BA

Deuteranopia (green-blind)

#5D79B7

Tritanopia (blue-blind)

#248C93

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #577fb8;
/* rgb */ color: rgb(87, 127, 184);
/* oklch */ color: oklch(59.2% 0.099 257.3);

Tailwind

colors: {
  custom: {
    50: '#8ca3cd',
    500: '#577fb8',
    950: '#000000',
  },
}

SCSS

$custom: #577fb8;
$custom-light: #8ca3cd;
$custom-dark: #000000;

JSON

{
  "hex": "#577fb8",
  "rgb": {
    "r": 87,
    "g": 127,
    "b": 184
  },
  "hsl": {
    "h": 215.258,
    "s": 40.586,
    "l": 53.137
  },
  "oklch": {
    "l": 0.59168,
    "c": 0.09873,
    "h": 257.3
  },
  "luminance": 0.20666
}

Semantic roles & 50–950 ramp

primary

#577FB8

secondary

#CAB9A0

accent

#9F57D0

background

#F8FAFC

surface

#F0F3F9

border

#CBCDD2

text

#0D0F13

muted

#7D7F82

Preview Lab

Preview with #577FB8

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

Preview Lab → · Contrast checker → · Palette generator →