#577BD4#577BD4

#577BD4 is a mid, vivid blue. Relative luminance 0.209; OKLCH L 59.9% C 0.142 H 265.7°. Best body text is #000000 at 5.19:1 contrast (WCAG AA passes).

Color values

HEX	#577BD4
RGB	rgb(87, 123, 212)
HSL	hsl(223, 59%, 59%)
HSV	hsv(223, 59%, 83%)
CMYK	cmyk(59%, 42%, 0%, 16.9%)
CIE-LAB	lab(52.89, 14.16, -49.73)
CIE-LCH	lch(52.89, 51.70, 285.90°)
OKLab	oklab(59.87% -0.0106 -0.1415)
OKLCH	oklch(59.87% 0.142 265.7)
XYZ	xyz(22.8931, 20.9437, 65.1107)
Luminance	0.2095 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BD4 #D4B057

analogous

#57B9D4 #577BD4 #7157D4

triadic

#577BD4 #D4577B #7BD457

tetradic

#577BD4 #D457B9 #D4B057 #57D471

square

#577BD4 #D457B9 #D4B057 #57D471

split-complementary

#577BD4 #D47157 #B9D457

monochromatic

#24428D #3059BD #577BD4 #88A1E0 #B8C8ED

Accessibility & contrast

On white

4.05

#577BD4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.19

#577BD4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BD4

5.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BD4	#FFFFFF	#000000	##000000
##577BD4	1.00	4.05	5.19	5.19
#FFFFFF	4.05	1.00	21.00	21.00
#000000	5.19	21.00	1.00	1.00
##000000	5.19	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5484D7

Deuteranopia (green-blind)

#4379D2

Tritanopia (blue-blind)

#008F9D

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #577bd4;
/* rgb */ color: rgb(87, 123, 212);
/* oklch */ color: oklch(59.9% 0.142 265.7);

Tailwind

colors: {
  custom: {
    50: '#90a0e2',
    500: '#577bd4',
    950: '#000000',
  },
}

SCSS

$custom: #577bd4;
$custom-light: #90a0e2;
$custom-dark: #000000;

JSON

{
  "hex": "#577bd4",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 212
  },
  "hsl": {
    "h": 222.72,
    "s": 59.242,
    "l": 58.627
  },
  "oklch": {
    "l": 0.59872,
    "c": 0.1419,
    "h": 265.7
  },
  "luminance": 0.20946
}

Semantic roles & 50–950 ramp

primary

#577BD4

secondary

#DCCEAB

accent

#B545E2

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #577BD4

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

Preview Lab → · Contrast checker → · Palette generator →