#577CCA#577CCA

#577CCA is a mid, vivid blue. Relative luminance 0.207; OKLCH L 59.5% C 0.127 H 263.8°. Best body text is #000000 at 5.14:1 contrast (WCAG AA passes).

Color values

HEX	#577CCA
RGB	rgb(87, 124, 202)
HSL	hsl(221, 52%, 57%)
HSV	hsv(221, 57%, 79%)
CMYK	cmyk(56.9%, 38.6%, 0%, 20.8%)
CIE-LAB	lab(52.62, 10.25, -44.47)
CIE-LCH	lch(52.62, 45.64, 282.97°)
OKLab	oklab(59.49% -0.0137 -0.1261)
OKLCH	oklch(59.49% 0.127 263.8)
XYZ	xyz(21.7952, 20.7041, 58.7134)
Luminance	0.2071 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CCA #CAA557

analogous

#57B5CA #577CCA #6C57CA

triadic

#577CCA #CA577C #7CCA57

tetradic

#577CCA #CA57B5 #CAA557 #57CA6C

square

#577CCA #CA57B5 #CAA557 #57CA6C

split-complementary

#577CCA #CA6C57 #B5CA57

monochromatic

#28447F #375DAD #577CCA #86A0D9 #B4C5E7

Accessibility & contrast

On white

4.08

#577CCA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.14

#577CCA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CCA

5.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CCA	#FFFFFF	#000000	##000000
##577CCA	1.00	4.08	5.14	5.14
#FFFFFF	4.08	1.00	21.00	21.00
#000000	5.14	21.00	1.00	1.00
##000000	5.14	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B83CD

Deuteranopia (green-blind)

#4D79C8

Tritanopia (blue-blind)

#008D99

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #577cca;
/* rgb */ color: rgb(87, 124, 202);
/* oklch */ color: oklch(59.5% 0.127 263.8);

Tailwind

colors: {
  custom: {
    50: '#8fa1da',
    500: '#577cca',
    950: '#000000',
  },
}

SCSS

$custom: #577cca;
$custom-light: #8fa1da;
$custom-dark: #000000;

JSON

{
  "hex": "#577cca",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 202
  },
  "hsl": {
    "h": 220.696,
    "s": 52.036,
    "l": 56.667
  },
  "oklch": {
    "l": 0.59494,
    "c": 0.12684,
    "h": 263.8
  },
  "luminance": 0.20706
}

Semantic roles & 50–950 ramp

primary

#577CCA

secondary

#D6C7A7

accent

#AD4CDB

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #577CCA

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

Preview Lab → · Contrast checker → · Palette generator →