#4251CD#4251CD

#4251CD is a mid, vivid blue. Relative luminance 0.115; OKLCH L 49.9% C 0.191 H 272.2°. Best body text is #FFFFFF at 6.38:1 contrast (WCAG AA passes).

Color values

HEX	#4251CD
RGB	rgb(66, 81, 205)
HSL	hsl(234, 58%, 53%)
HSV	hsv(234, 68%, 80%)
CMYK	cmyk(67.8%, 60.5%, 0%, 19.6%)
CIE-LAB	lab(40.33, 34.46, -66.03)
CIE-LCH	lch(40.33, 74.48, 297.56°)
OKLab	oklab(49.92% 0.0073 -0.1904)
OKLCH	oklch(49.92% 0.191 272.2)
XYZ	xyz(16.2049, 11.4494, 59.1017)
Luminance	0.1145 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4251CD #CDBE42

analogous

#4296CD #4251CD #7842CD

triadic

#4251CD #CD4251 #51CD42

tetradic

#4251CD #CD4296 #CDBE42 #42CD78

square

#4251CD #CD4296 #CDBE42 #42CD78

split-complementary

#4251CD #CD7842 #96CD42

monochromatic

#1F2876 #2C39A6 #4251CD #727EDA #A3AAE7

Accessibility & contrast

On white

6.38

#4251CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.29

#4251CD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4251CD

6.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4251CD	#FFFFFF	#000000	##FFFFFF
##4251CD	1.00	6.38	3.29	6.38
#FFFFFF	6.38	1.00	21.00	1.00
#000000	3.29	21.00	1.00	21.00
##FFFFFF	6.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0066D1

Deuteranopia (green-blind)

#0059CB

Tritanopia (blue-blind)

#007087

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #4251cd;
/* rgb */ color: rgb(66, 81, 205);
/* oklch */ color: oklch(49.9% 0.191 272.2);

Tailwind

colors: {
  custom: {
    50: '#8781dd',
    500: '#4251cd',
    950: '#000000',
  },
}

SCSS

$custom: #4251cd;
$custom-light: #8781dd;
$custom-dark: #000000;

JSON

{
  "hex": "#4251cd",
  "rgb": {
    "r": 66,
    "g": 81,
    "b": 205
  },
  "hsl": {
    "h": 233.525,
    "s": 58.159,
    "l": 53.137
  },
  "oklch": {
    "l": 0.49922,
    "c": 0.19054,
    "h": 272.2
  },
  "luminance": 0.11451
}

Semantic roles & 50–950 ramp

primary

#4251CD

secondary

#D3CD97

accent

#D146E1

background

#F9F7FD

surface

#F1EEFB

border

#CBC9D4

text

#0D0A15

muted

#7E7C83

Preview Lab

Preview with #4251CD

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

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