#4255B3#4255B3

#4255B3 is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.6% C 0.150 H 271.2°. Best body text is #FFFFFF at 6.60:1 contrast (WCAG AA passes).

Color values

HEX	#4255B3
RGB	rgb(66, 85, 179)
HSL	hsl(230, 46%, 48%)
HSV	hsv(230, 63%, 70%)
CMYK	cmyk(63.1%, 52.5%, 0%, 29.8%)
CIE-LAB	lab(39.43, 22.80, -52.33)
CIE-LCH	lch(39.43, 57.08, 293.54°)
OKLab	oklab(48.64% 0.0031 -0.1501)
OKLCH	oklch(48.64% 0.15 271.2)
XYZ	xyz(13.6292, 10.9088, 44.0264)
Luminance	0.1091 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4255B3 #B3A042

analogous

#428DB3 #4255B3 #6842B3

triadic

#4255B3 #B34255 #55B342

tetradic

#4255B3 #B3428D #B3A042 #42B368

square

#4255B3 #B3428D #B3A042 #42B368

split-complementary

#4255B3 #B36842 #8DB342

monochromatic

#212B5A #324086 #4255B3 #6A7AC8 #97A2D9

Accessibility & contrast

On white

6.60

#4255B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.18

#4255B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4255B3

6.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4255B3	#FFFFFF	#000000	##FFFFFF
##4255B3	1.00	6.60	3.18	6.60
#FFFFFF	6.60	1.00	21.00	1.00
#000000	3.18	21.00	1.00	21.00
##FFFFFF	6.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C62B6

Deuteranopia (green-blind)

#0058B1

Tritanopia (blue-blind)

#006B7C

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #4255b3;
/* rgb */ color: rgb(66, 85, 179);
/* oklch */ color: oklch(48.6% 0.150 271.2);

Tailwind

colors: {
  custom: {
    50: '#8284ca',
    500: '#4255b3',
    950: '#000000',
  },
}

SCSS

$custom: #4255b3;
$custom-light: #8284ca;
$custom-dark: #000000;

JSON

{
  "hex": "#4255b3",
  "rgb": {
    "r": 66,
    "g": 85,
    "b": 179
  },
  "hsl": {
    "h": 229.912,
    "s": 46.122,
    "l": 48.039
  },
  "oklch": {
    "l": 0.48643,
    "c": 0.1501,
    "h": 271.2
  },
  "luminance": 0.1091
}

Semantic roles & 50–950 ramp

primary

#4255B3

secondary

#C4BB8C

accent

#C052D6

background

#F8F8FC

surface

#F0EFF8

border

#CBCAD1

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #4255B3

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

Preview Lab → · Contrast checker → · Palette generator →