#4255A5#4255A5

#4255A5 is a mid, vivid blue. Relative luminance 0.104; OKLCH L 47.6% C 0.130 H 270.7°. Best body text is #FFFFFF at 6.83:1 contrast (WCAG AA passes).

Color values

HEX	#4255A5
RGB	rgb(66, 85, 165)
HSL	hsl(228, 43%, 45%)
HSV	hsv(228, 60%, 65%)
CMYK	cmyk(60%, 48.5%, 0%, 35.3%)
CIE-LAB	lab(38.50, 17.89, -45.53)
CIE-LCH	lch(38.50, 48.92, 291.45°)
OKLab	oklab(47.65% 0.0016 -0.1301)
OKLCH	oklch(47.65% 0.13 270.7)
XYZ	xyz(12.2845, 10.3709, 36.9444)
Luminance	0.1037 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4255A5 #A59242

analogous

#4286A5 #4255A5 #6142A5

triadic

#4255A5 #A54255 #55A542

tetradic

#4255A5 #A54286 #A59242 #42A561

square

#4255A5 #A54286 #A59242 #42A561

split-complementary

#4255A5 #A56142 #86A542

monochromatic

#1F284E #313E79 #4255A5 #6375C1 #8F9CD2

Accessibility & contrast

On white

6.83

#4255A5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.07

#4255A5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4255A5

6.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4255A5	#FFFFFF	#000000	##FFFFFF
##4255A5	1.00	6.83	3.07	6.83
#FFFFFF	6.83	1.00	21.00	1.00
#000000	3.07	21.00	1.00	21.00
##FFFFFF	6.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E5FA8

Deuteranopia (green-blind)

#1D57A3

Tritanopia (blue-blind)

#006775

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #4255a5;
/* rgb */ color: rgb(66, 85, 165);
/* oklch */ color: oklch(47.6% 0.130 270.7);

Tailwind

colors: {
  custom: {
    50: '#7f84c0',
    500: '#4255a5',
    950: '#000000',
  },
}

SCSS

$custom: #4255a5;
$custom-light: #7f84c0;
$custom-dark: #000000;

JSON

{
  "hex": "#4255a5",
  "rgb": {
    "r": 66,
    "g": 85,
    "b": 165
  },
  "hsl": {
    "h": 228.485,
    "s": 42.857,
    "l": 45.294
  },
  "oklch": {
    "l": 0.47645,
    "c": 0.13008,
    "h": 270.7
  },
  "luminance": 0.10372
}

Semantic roles & 50–950 ramp

primary

#4255A5

secondary

#BDB385

accent

#BB55D3

background

#F8F8FB

surface

#EFEFF7

border

#CACAD0

text

#0B0A12

muted

#7C7C81

Preview Lab

Preview with #4255A5

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

Preview Lab → · Contrast checker → · Palette generator →