#577DBC#577DBC

#577DBC is a mid, moderate blue. Relative luminance 0.203; OKLCH L 58.9% C 0.106 H 260.1°. Best body text is #000000 at 5.06:1 contrast (WCAG AA passes).

Color values

HEX	#577DBC
RGB	rgb(87, 125, 188)
HSL	hsl(217, 43%, 54%)
HSV	hsv(217, 54%, 74%)
CMYK	cmyk(53.7%, 33.5%, 0%, 26.3%)
CIE-LAB	lab(52.20, 5.10, -37.14)
CIE-LCH	lch(52.20, 37.49, 277.81°)
OKLab	oklab(58.93% -0.0183 -0.1047)
OKLCH	oklch(58.93% 0.106 260.1)
XYZ	xyz(20.3381, 20.3228, 50.4181)
Luminance	0.2032 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577DBC #BC9657

analogous

#57B0BC #577DBC #6457BC

triadic

#577DBC #BC577D #7DBC57

tetradic

#577DBC #BC57B0 #BC9657 #57BC64

square

#577DBC #BC57B0 #BC9657 #57BC64

split-complementary

#577DBC #BC6457 #B0BC57

monochromatic

#2C446D #3D6099 #577DBC #839FCD #AFC1DF

Accessibility & contrast

On white

4.15

#577DBC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.06

#577DBC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577DBC

5.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577DBC	#FFFFFF	#000000	##000000
##577DBC	1.00	4.15	5.06	5.06
#FFFFFF	4.15	1.00	21.00	21.00
#000000	5.06	21.00	1.00	1.00
##000000	5.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6482BF

Deuteranopia (green-blind)

#5878BB

Tritanopia (blue-blind)

#1F8B94

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #577dbc;
/* rgb */ color: rgb(87, 125, 188);
/* oklch */ color: oklch(58.9% 0.106 260.1);

Tailwind

colors: {
  custom: {
    50: '#8da2d0',
    500: '#577dbc',
    950: '#000000',
  },
}

SCSS

$custom: #577dbc;
$custom-light: #8da2d0;
$custom-dark: #000000;

JSON

{
  "hex": "#577dbc",
  "rgb": {
    "r": 87,
    "g": 125,
    "b": 188
  },
  "hsl": {
    "h": 217.426,
    "s": 42.979,
    "l": 53.922
  },
  "oklch": {
    "l": 0.58934,
    "c": 0.1063,
    "h": 260.1
  },
  "luminance": 0.20324
}

Semantic roles & 50–950 ramp

primary

#577DBC

secondary

#CDBDA2

accent

#A355D3

background

#F9F9FC

surface

#F1F2F9

border

#CBCCD2

text

#0D0F14

muted

#7E7E82

Preview Lab

Preview with #577DBC

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

Preview Lab → · Contrast checker → · Palette generator →