#577DCB#577DCB

#577DCB is a mid, vivid blue. Relative luminance 0.210; OKLCH L 59.8% C 0.127 H 263.4°. Best body text is #000000 at 5.20:1 contrast (WCAG AA passes).

Color values

HEX	#577DCB
RGB	rgb(87, 125, 203)
HSL	hsl(220, 53%, 57%)
HSV	hsv(220, 57%, 80%)
CMYK	cmyk(57.1%, 38.4%, 0%, 20.4%)
CIE-LAB	lab(52.95, 9.97, -44.52)
CIE-LCH	lch(52.95, 45.62, 282.62°)
OKLab	oklab(59.77% -0.0146 -0.1262)
OKLCH	oklch(59.77% 0.127 263.4)
XYZ	xyz(22.0399, 21.0035, 59.3810)
Luminance	0.2100 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577DCB #CBA557

analogous

#57B7CB #577DCB #6B57CB

triadic

#577DCB #CB577D #7DCB57

tetradic

#577DCB #CB57B7 #CBA557 #57CB6B

square

#577DCB #CB57B7 #CBA557 #57CB6B

split-complementary

#577DCB #CB6B57 #B7CB57

monochromatic

#284580 #365EAF #577DCB #86A1D9 #B4C5E8

Accessibility & contrast

On white

4.04

#577DCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.20

#577DCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577DCB

5.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577DCB	#FFFFFF	#000000	##000000
##577DCB	1.00	4.04	5.20	5.20
#FFFFFF	4.04	1.00	21.00	21.00
#000000	5.20	21.00	1.00	1.00
##000000	5.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C84CE

Deuteranopia (green-blind)

#4E7AC9

Tritanopia (blue-blind)

#008E9A

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #577dcb;
/* rgb */ color: rgb(87, 125, 203);
/* oklch */ color: oklch(59.8% 0.127 263.4);

Tailwind

colors: {
  custom: {
    50: '#8fa2db',
    500: '#577dcb',
    950: '#000000',
  },
}

SCSS

$custom: #577dcb;
$custom-light: #8fa2db;
$custom-dark: #000000;

JSON

{
  "hex": "#577dcb",
  "rgb": {
    "r": 87,
    "g": 125,
    "b": 203
  },
  "hsl": {
    "h": 220.345,
    "s": 52.727,
    "l": 56.863
  },
  "oklch": {
    "l": 0.59765,
    "c": 0.12707,
    "h": 263.4
  },
  "luminance": 0.21005
}

Semantic roles & 50–950 ramp

primary

#577DCB

secondary

#D7C7A7

accent

#AD4CDC

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0F15

muted

#7E7E83

Preview Lab

Preview with #577DCB

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

Preview Lab → · Contrast checker → · Palette generator →