#4251CF#4251CF

#4251CF is a mid, vivid blue. Relative luminance 0.115; OKLCH L 50.1% C 0.193 H 272.2°. Best body text is #FFFFFF at 6.35:1 contrast (WCAG AA passes).

Color values

HEX	#4251CF
RGB	rgb(66, 81, 207)
HSL	hsl(234, 59%, 54%)
HSV	hsv(234, 68%, 81%)
CMYK	cmyk(68.1%, 60.9%, 0%, 18.8%)
CIE-LAB	lab(40.49, 35.16, -66.93)
CIE-LCH	lch(40.49, 75.60, 297.71°)
OKLab	oklab(50.09% 0.0073 -0.193)
OKLCH	oklch(50.09% 0.193 272.2)
XYZ	xyz(16.4479, 11.5465, 60.3813)
Luminance	0.1155 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4251CF #CFC042

analogous

#4297CF #4251CF #7942CF

triadic

#4251CF #CF4251 #51CF42

tetradic

#4251CF #CF4297 #CFC042 #42CF79

square

#4251CF #CF4297 #CFC042 #42CF79

split-complementary

#4251CF #CF7942 #97CF42

monochromatic

#1F2878 #2B38A9 #4251CF #737EDB #A4ABE8

Accessibility & contrast

On white

6.35

#4251CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.31

#4251CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4251CF

6.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4251CF	#FFFFFF	#000000	##FFFFFF
##4251CF	1.00	6.35	3.31	6.35
#FFFFFF	6.35	1.00	21.00	1.00
#000000	3.31	21.00	1.00	21.00
##FFFFFF	6.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0066D3

Deuteranopia (green-blind)

#0059CD

Tritanopia (blue-blind)

#007188

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #4251cf;
/* rgb */ color: rgb(66, 81, 207);
/* oklch */ color: oklch(50.1% 0.193 272.2);

Tailwind

colors: {
  custom: {
    50: '#8781df',
    500: '#4251cf',
    950: '#000000',
  },
}

SCSS

$custom: #4251cf;
$custom-light: #8781df;
$custom-dark: #000000;

JSON

{
  "hex": "#4251cf",
  "rgb": {
    "r": 66,
    "g": 81,
    "b": 207
  },
  "hsl": {
    "h": 233.617,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.50089,
    "c": 0.19317,
    "h": 272.2
  },
  "luminance": 0.11548
}

Semantic roles & 50–950 ramp

primary

#4251CF

secondary

#D5CE98

accent

#D245E3

background

#F9F7FD

surface

#F1EEFB

border

#CBC9D4

text

#0D0A15

muted

#7E7C83

Preview Lab

Preview with #4251CF

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

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