#577FBC#577FBC

#577FBC is a mid, moderate blue. Relative luminance 0.208; OKLCH L 59.4% C 0.104 H 258.6°. Best body text is #000000 at 5.17:1 contrast (WCAG AA passes).

Color values

HEX	#577FBC
RGB	rgb(87, 127, 188)
HSL	hsl(216, 43%, 54%)
HSV	hsv(216, 54%, 74%)
CMYK	cmyk(53.7%, 32.4%, 0%, 26.3%)
CIE-LAB	lab(52.77, 3.90, -36.25)
CIE-LCH	lch(52.77, 36.46, 276.14°)
OKLab	oklab(59.38% -0.0206 -0.1021)
OKLCH	oklch(59.38% 0.104 258.6)
XYZ	xyz(20.5938, 20.8342, 50.5034)
Luminance	0.2084 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577FBC #BC9457

analogous

#57B2BC #577FBC #6257BC

triadic

#577FBC #BC577F #7FBC57

tetradic

#577FBC #BC57B2 #BC9457 #57BC62

square

#577FBC #BC57B2 #BC9457 #57BC62

split-complementary

#577FBC #BC6257 #B2BC57

monochromatic

#2C456D #3D6199 #577FBC #83A0CD #AFC2DF

Accessibility & contrast

On white

4.06

#577FBC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.17

#577FBC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577FBC

5.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577FBC	#FFFFFF	#000000	##000000
##577FBC	1.00	4.06	5.17	5.17
#FFFFFF	4.06	1.00	21.00	21.00
#000000	5.17	21.00	1.00	1.00
##000000	5.17	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6783BF

Deuteranopia (green-blind)

#5A7ABB

Tritanopia (blue-blind)

#1F8D95

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #577fbc;
/* rgb */ color: rgb(87, 127, 188);
/* oklch */ color: oklch(59.4% 0.104 258.6);

Tailwind

colors: {
  custom: {
    50: '#8da3d0',
    500: '#577fbc',
    950: '#000000',
  },
}

SCSS

$custom: #577fbc;
$custom-light: #8da3d0;
$custom-dark: #000000;

JSON

{
  "hex": "#577fbc",
  "rgb": {
    "r": 87,
    "g": 127,
    "b": 188
  },
  "hsl": {
    "h": 216.238,
    "s": 42.979,
    "l": 53.922
  },
  "oklch": {
    "l": 0.59377,
    "c": 0.10417,
    "h": 258.6
  },
  "luminance": 0.20836
}

Semantic roles & 50–950 ramp

primary

#577FBC

secondary

#CDBCA2

accent

#A155D3

background

#F9FAFC

surface

#F1F3F9

border

#CBCDD2

text

#0D0F14

muted

#7E7F82

Preview Lab

Preview with #577FBC

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

Preview Lab → · Contrast checker → · Palette generator →