#2857B3#2857B3

#2857B3 is a mid, vivid blue. Relative luminance 0.105; OKLCH L 47.8% C 0.155 H 262.0°. Best body text is #FFFFFF at 6.76:1 contrast (WCAG AA passes).

Color values

HEX	#2857B3
RGB	rgb(40, 87, 179)
HSL	hsl(220, 63%, 43%)
HSV	hsv(220, 78%, 70%)
CMYK	cmyk(77.7%, 51.4%, 0%, 29.8%)
CIE-LAB	lab(38.76, 17.66, -53.46)
CIE-LCH	lch(38.76, 56.31, 288.28°)
OKLab	oklab(47.81% -0.0216 -0.1539)
OKLCH	oklch(47.81% 0.155 262)
XYZ	xyz(12.4170, 10.5208, 44.0154)
Luminance	0.1052 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2857B3 #B38428

analogous

#289CB3 #2857B3 #3E28B3

triadic

#2857B3 #B32857 #57B328

tetradic

#2857B3 #B3289C #B38428 #28B33E

square

#2857B3 #B3289C #B38428 #28B33E

split-complementary

#2857B3 #B33E28 #9CB328

monochromatic

#12264F #1D3F81 #2857B3 #4374D5 #7599E0

Accessibility & contrast

On white

6.76

#2857B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#2857B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2857B3

6.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2857B3	#FFFFFF	#000000	##FFFFFF
##2857B3	1.00	6.76	3.10	6.76
#FFFFFF	6.76	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B62B6

Deuteranopia (green-blind)

#0055B1

Tritanopia (blue-blind)

#006D7C

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #2857b3;
/* rgb */ color: rgb(40, 87, 179);
/* oklch */ color: oklch(47.8% 0.155 262.0);

Tailwind

colors: {
  custom: {
    50: '#7785ca',
    500: '#2857b3',
    950: '#000000',
  },
}

SCSS

$custom: #2857b3;
$custom-light: #7785ca;
$custom-dark: #000000;

JSON

{
  "hex": "#2857b3",
  "rgb": {
    "r": 40,
    "g": 87,
    "b": 179
  },
  "hsl": {
    "h": 219.712,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.47808,
    "c": 0.1554,
    "h": 262
  },
  "luminance": 0.10522
}

Semantic roles & 50–950 ramp

primary

#2857B3

secondary

#C8AA6F

accent

#AF41E6

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #2857B3

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

Preview Lab → · Contrast checker → · Palette generator →