#397BB1#397BB1

#397BB1 is a mid, moderate cyan. Relative luminance 0.182; OKLCH L 56.5% C 0.107 H 246.0°. Best body text is #000000 at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#397BB1
RGB	rgb(57, 123, 177)
HSL	hsl(207, 51%, 46%)
HSV	hsv(207, 68%, 69%)
CMYK	cmyk(67.8%, 30.5%, 0%, 30.6%)
CIE-LAB	lab(49.75, -3.33, -34.75)
CIE-LCH	lch(49.75, 34.91, 264.52°)
OKLab	oklab(56.47% -0.0437 -0.0982)
OKLCH	oklch(56.47% 0.107 246)
XYZ	xyz(16.7031, 18.2084, 44.2207)
Luminance	0.1821 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#397BB1 #B16F39

analogous

#39B1AB #397BB1 #393FB1

triadic

#397BB1 #B1397B #7BB139

tetradic

#397BB1 #AB39B1 #B16F39 #3FB139

square

#397BB1 #AB39B1 #B16F39 #3FB139

split-complementary

#397BB1 #B1393F #B1AB39

monochromatic

#1B3B54 #2A5B83 #397BB1 #5D99CB #8BB6DA

Accessibility & contrast

On white

4.52

#397BB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.64

#397BB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #397BB1

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##397BB1	#FFFFFF	#000000	##000000
##397BB1	1.00	4.52	4.64	4.64
#FFFFFF	4.52	1.00	21.00	21.00
#000000	4.64	21.00	1.00	1.00
##000000	4.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#637DB3

Deuteranopia (green-blind)

#5271B0

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #397bb1;
/* rgb */ color: rgb(57, 123, 177);
/* oklch */ color: oklch(56.5% 0.107 246.0);

Tailwind

colors: {
  custom: {
    50: '#7da1c8',
    500: '#397bb1',
    950: '#000000',
  },
}

SCSS

$custom: #397bb1;
$custom-light: #7da1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#397bb1",
  "rgb": {
    "r": 57,
    "g": 123,
    "b": 177
  },
  "hsl": {
    "h": 207,
    "s": 51.282,
    "l": 45.882
  },
  "oklch": {
    "l": 0.56473,
    "c": 0.10749,
    "h": 246
  },
  "luminance": 0.1821
}

Semantic roles & 50–950 ramp

primary

#397BB1

secondary

#C4A082

accent

#8D4DDB

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #397BB1

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

Preview Lab → · Contrast checker → · Palette generator →