#4275BF#4275BF

#4275BF is a mid, vivid blue. Relative luminance 0.176; OKLCH L 56.3% C 0.128 H 257.8°. Best body text is #FFFFFF at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#4275BF
RGB	rgb(66, 117, 191)
HSL	hsl(216, 49%, 50%)
HSV	hsv(216, 65%, 75%)
CMYK	cmyk(65.4%, 38.7%, 0%, 25.1%)
CIE-LAB	lab(49.06, 6.76, -43.90)
CIE-LCH	lch(49.06, 44.41, 278.75°)
OKLab	oklab(56.26% -0.0271 -0.1249)
OKLCH	oklch(56.26% 0.128 257.8)
XYZ	xyz(18.0087, 17.6407, 51.7360)
Luminance	0.1764 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4275BF #BF8C42

analogous

#42B3BF #4275BF #4D42BF

triadic

#4275BF #BF4275 #75BF42

tetradic

#4275BF #BF42B3 #BF8C42 #42BF4D

square

#4275BF #BF42B3 #BF8C42 #42BF4D

split-complementary

#4275BF #BF4D42 #B3BF42

monochromatic

#223D65 #325992 #4275BF #7096CE #9DB8DE

Accessibility & contrast

On white

4.64

#4275BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#4275BF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #4275BF

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4275BF	#FFFFFF	#000000	##FFFFFF
##4275BF	1.00	4.64	4.53	4.64
#FFFFFF	4.64	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#547BC2

Deuteranopia (green-blind)

#426FBD

Tritanopia (blue-blind)

#008691

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #4275bf;
/* rgb */ color: rgb(66, 117, 191);
/* oklch */ color: oklch(56.3% 0.128 257.8);

Tailwind

colors: {
  custom: {
    50: '#839cd3',
    500: '#4275bf',
    950: '#000000',
  },
}

SCSS

$custom: #4275bf;
$custom-light: #839cd3;
$custom-dark: #000000;

JSON

{
  "hex": "#4275bf",
  "rgb": {
    "r": 66,
    "g": 117,
    "b": 191
  },
  "hsl": {
    "h": 215.52,
    "s": 49.407,
    "l": 50.392
  },
  "oklch": {
    "l": 0.56263,
    "c": 0.12776,
    "h": 257.8
  },
  "luminance": 0.17642
}

Semantic roles & 50–950 ramp

primary

#4275BF

secondary

#CAB493

accent

#A14FD9

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0E14

muted

#7D7E82

Preview Lab

Preview with #4275BF

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

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