#4255BF#4255BF

#4255BF is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.5% C 0.167 H 271.3°. Best body text is #FFFFFF at 6.40:1 contrast (WCAG AA passes).

Color values

HEX	#4255BF
RGB	rgb(66, 85, 191)
HSL	hsl(231, 49%, 50%)
HSV	hsv(231, 65%, 75%)
CMYK	cmyk(65.4%, 55.5%, 0%, 25.1%)
CIE-LAB	lab(40.27, 27.03, -58.00)
CIE-LCH	lch(40.27, 63.98, 294.99°)
OKLab	oklab(49.55% 0.0039 -0.1667)
OKLCH	oklch(49.55% 0.167 271.3)
XYZ	xyz(14.8961, 11.4155, 50.6985)
Luminance	0.1142 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4255BF #BFAC42

analogous

#4293BF #4255BF #6D42BF

triadic

#4255BF #BF4255 #55BF42

tetradic

#4255BF #BF4293 #BFAC42 #42BF6D

square

#4255BF #BF4293 #BFAC42 #42BF6D

split-complementary

#4255BF #BF6D42 #93BF42

monochromatic

#222C65 #324092 #4255BF #707ECE #9DA7DE

Accessibility & contrast

On white

6.40

#4255BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.28

#4255BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4255BF

6.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4255BF	#FFFFFF	#000000	##FFFFFF
##4255BF	1.00	6.40	3.28	6.40
#FFFFFF	6.40	1.00	21.00	1.00
#000000	3.28	21.00	1.00	21.00
##FFFFFF	6.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065C3

Deuteranopia (green-blind)

#0059BD

Tritanopia (blue-blind)

#006E82

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #4255bf;
/* rgb */ color: rgb(66, 85, 191);
/* oklch */ color: oklch(49.5% 0.167 271.3);

Tailwind

colors: {
  custom: {
    50: '#8484d3',
    500: '#4255bf',
    950: '#000000',
  },
}

SCSS

$custom: #4255bf;
$custom-light: #8484d3;
$custom-dark: #000000;

JSON

{
  "hex": "#4255bf",
  "rgb": {
    "r": 66,
    "g": 85,
    "b": 191
  },
  "hsl": {
    "h": 230.88,
    "s": 49.407,
    "l": 50.392
  },
  "oklch": {
    "l": 0.49547,
    "c": 0.16678,
    "h": 271.3
  },
  "luminance": 0.11417
}

Semantic roles & 50–950 ramp

primary

#4255BF

secondary

#CAC293

accent

#C44FD9

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0B14

muted

#7D7C83

Preview Lab

Preview with #4255BF

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

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