#397BDF#397BDF

#397BDF is a mid, vivid blue. Relative luminance 0.204; OKLCH L 59.2% C 0.167 H 258.7°. Best body text is #000000 at 5.07:1 contrast (WCAG AA passes).

Color values

HEX	#397BDF
RGB	rgb(57, 123, 223)
HSL	hsl(216, 72%, 55%)
HSV	hsv(216, 74%, 87%)
CMYK	cmyk(74.4%, 44.8%, 0%, 12.5%)
CIE-LAB	lab(52.24, 13.24, -57.04)
CIE-LCH	lch(52.24, 58.55, 283.07°)
OKLab	oklab(59.23% -0.0326 -0.1635)
OKLCH	oklch(59.23% 0.167 258.7)
XYZ	xyz(22.0847, 20.3610, 72.5639)
Luminance	0.2036 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#397BDF #DF9D39

analogous

#39CEDF #397BDF #4A39DF

triadic

#397BDF #DF397B #7BDF39

tetradic

#397BDF #DF39CE #DF9D39 #39DF4A

square

#397BDF #DF39CE #DF9D39 #39DF4A

split-complementary

#397BDF #DF4A39 #CEDF39

monochromatic

#164388 #1E5DBC #397BDF #6E9EE8 #A2C1F0

Accessibility & contrast

On white

4.14

#397BDF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.07

#397BDF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #397BDF

5.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##397BDF	#FFFFFF	#000000	##000000
##397BDF	1.00	4.14	5.07	5.07
#FFFFFF	4.14	1.00	21.00	21.00
#000000	5.07	21.00	1.00	1.00
##000000	5.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4785E3

Deuteranopia (green-blind)

#2476DD

Tritanopia (blue-blind)

#0093A2

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #397bdf;
/* rgb */ color: rgb(57, 123, 223);
/* oklch */ color: oklch(59.2% 0.167 258.7);

Tailwind

colors: {
  custom: {
    50: '#85a0e9',
    500: '#397bdf',
    950: '#000000',
  },
}

SCSS

$custom: #397bdf;
$custom-light: #85a0e9;
$custom-dark: #000000;

JSON

{
  "hex": "#397bdf",
  "rgb": {
    "r": 57,
    "g": 123,
    "b": 223
  },
  "hsl": {
    "h": 216.145,
    "s": 72.174,
    "l": 54.902
  },
  "oklch": {
    "l": 0.5923,
    "c": 0.16671,
    "h": 258.7
  },
  "luminance": 0.20363
}

Semantic roles & 50–950 ramp

primary

#397BDF

secondary

#DDC197

accent

#A739EF

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #397BDF

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

Preview Lab → · Contrast checker → · Palette generator →