#577DBB#577DBB

#577DBB is a mid, moderate blue. Relative luminance 0.203; OKLCH L 58.9% C 0.105 H 259.8°. Best body text is #000000 at 5.06:1 contrast (WCAG AA passes).

Color values

HEX	#577DBB
RGB	rgb(87, 125, 187)
HSL	hsl(217, 42%, 54%)
HSV	hsv(217, 53%, 73%)
CMYK	cmyk(53.5%, 33.2%, 0%, 26.7%)
CIE-LAB	lab(52.15, 4.78, -36.64)
CIE-LCH	lch(52.15, 36.95, 277.42°)
OKLab	oklab(58.88% -0.0185 -0.1033)
OKLCH	oklch(58.88% 0.105 259.8)
XYZ	xyz(20.2307, 20.2798, 49.8524)
Luminance	0.2028 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577DBB #BB9557

analogous

#57AFBB #577DBB #6357BB

triadic

#577DBB #BB577D #7DBB57

tetradic

#577DBB #BB57AF #BB9557 #57BB63

square

#577DBB #BB57AF #BB9557 #57BB63

split-complementary

#577DBB #BB6357 #AFBB57

monochromatic

#2C446C #3D6097 #577DBB #839FCD #AEC0DE

Accessibility & contrast

On white

4.15

#577DBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.06

#577DBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577DBB

5.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577DBB	#FFFFFF	#000000	##000000
##577DBB	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)

#6482BE

Deuteranopia (green-blind)

#5878BA

Tritanopia (blue-blind)

#218B93

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #577dbb;
/* rgb */ color: rgb(87, 125, 187);
/* oklch */ color: oklch(58.9% 0.105 259.8);

Tailwind

colors: {
  custom: {
    50: '#8da2cf',
    500: '#577dbb',
    950: '#000000',
  },
}

SCSS

$custom: #577dbb;
$custom-light: #8da2cf;
$custom-dark: #000000;

JSON

{
  "hex": "#577dbb",
  "rgb": {
    "r": 87,
    "g": 125,
    "b": 187
  },
  "hsl": {
    "h": 217.2,
    "s": 42.373,
    "l": 53.725
  },
  "oklch": {
    "l": 0.58881,
    "c": 0.10492,
    "h": 259.8
  },
  "luminance": 0.20281
}

Semantic roles & 50–950 ramp

primary

#577DBB

secondary

#CCBCA2

accent

#A356D2

background

#F9F9FC

surface

#F1F2F9

border

#CBCCD2

text

#0D0F14

muted

#7E7E82

Preview Lab

Preview with #577DBB

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

Preview Lab → · Contrast checker → · Palette generator →