#4370BB#4370BB

#4370BB is a mid, vivid blue. Relative luminance 0.164; OKLCH L 55.0% C 0.128 H 260.1°. Best body text is #FFFFFF at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#4370BB
RGB	rgb(67, 112, 187)
HSL	hsl(218, 47%, 50%)
HSV	hsv(218, 64%, 73%)
CMYK	cmyk(64.2%, 40.1%, 0%, 26.7%)
CIE-LAB	lab(47.45, 8.62, -44.14)
CIE-LCH	lch(47.45, 44.97, 281.05°)
OKLab	oklab(54.96% -0.022 -0.1256)
OKLCH	oklch(54.96% 0.128 260.1)
XYZ	xyz(17.0754, 16.3679, 49.2635)
Luminance	0.1637 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4370BB #BB8E43

analogous

#43ACBB #4370BB #5243BB

triadic

#4370BB #BB4370 #70BB43

tetradic

#4370BB #BB43AC #BB8E43 #43BB52

square

#4370BB #BB43AC #BB8E43 #43BB52

split-complementary

#4370BB #BB5243 #ACBB43

monochromatic

#233A61 #33558E #4370BB #7092CC #9DB4DC

Accessibility & contrast

On white

4.91

#4370BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.27

#4370BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4370BB

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4370BB	#FFFFFF	#000000	##FFFFFF
##4370BB	1.00	4.91	4.27	4.91
#FFFFFF	4.91	1.00	21.00	1.00
#000000	4.27	21.00	1.00	21.00
##FFFFFF	4.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F77BE

Deuteranopia (green-blind)

#3D6BB9

Tritanopia (blue-blind)

#00818C

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #4370bb;
/* rgb */ color: rgb(67, 112, 187);
/* oklch */ color: oklch(55.0% 0.128 260.1);

Tailwind

colors: {
  custom: {
    50: '#8398d0',
    500: '#4370bb',
    950: '#000000',
  },
}

SCSS

$custom: #4370bb;
$custom-light: #8398d0;
$custom-dark: #000000;

JSON

{
  "hex": "#4370bb",
  "rgb": {
    "r": 67,
    "g": 112,
    "b": 187
  },
  "hsl": {
    "h": 217.5,
    "s": 47.244,
    "l": 49.804
  },
  "oklch": {
    "l": 0.54959,
    "c": 0.12753,
    "h": 260.1
  },
  "luminance": 0.16369
}

Semantic roles & 50–950 ramp

primary

#4370BB

secondary

#C8B492

accent

#A551D7

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0D14

muted

#7D7E82

Preview Lab

Preview with #4370BB

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

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