#4370D1#4370D1

#4370D1 is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.4% C 0.158 H 263.5°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#4370D1
RGB	rgb(67, 112, 209)
HSL	hsl(221, 61%, 54%)
HSV	hsv(221, 68%, 82%)
CMYK	cmyk(67.9%, 46.4%, 0%, 18%)
CIE-LAB	lab(48.74, 16.42, -54.71)
CIE-LCH	lch(48.74, 57.12, 286.70°)
OKLab	oklab(56.37% -0.0179 -0.1567)
OKLCH	oklch(56.37% 0.158 263.5)
XYZ	xyz(19.6135, 17.3831, 62.6309)
Luminance	0.1739 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4370D1 #D1A443

analogous

#43B7D1 #4370D1 #5D43D1

triadic

#4370D1 #D14370 #70D143

tetradic

#4370D1 #D143B7 #D1A443 #43D15D

square

#4370D1 #D143B7 #D1A443 #43D15D

split-complementary

#4370D1 #D15D43 #B7D143

monochromatic

#1E3C7B #2A54AD #4370D1 #7495DD #A5BBE9

Accessibility & contrast

On white

4.69

#4370D1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.48

#4370D1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4370D1

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4370D1	#FFFFFF	#000000	##FFFFFF
##4370D1	1.00	4.69	4.48	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.48	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E7BD5

Deuteranopia (green-blind)

#206ECF

Tritanopia (blue-blind)

#008796

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #4370d1;
/* rgb */ color: rgb(67, 112, 209);
/* oklch */ color: oklch(56.4% 0.158 263.5);

Tailwind

colors: {
  custom: {
    50: '#8798e0',
    500: '#4370d1',
    950: '#000000',
  },
}

SCSS

$custom: #4370d1;
$custom-light: #8798e0;
$custom-dark: #000000;

JSON

{
  "hex": "#4370d1",
  "rgb": {
    "r": 67,
    "g": 112,
    "b": 209
  },
  "hsl": {
    "h": 220.986,
    "s": 60.684,
    "l": 54.118
  },
  "oklch": {
    "l": 0.56366,
    "c": 0.15769,
    "h": 263.5
  },
  "luminance": 0.17385
}

Semantic roles & 50–950 ramp

primary

#4370D1

secondary

#D6C39A

accent

#B144E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #4370D1

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

Preview Lab → · Contrast checker → · Palette generator →