#397BB3#397BB3

#397BB3 is a mid, moderate cyan. Relative luminance 0.183; OKLCH L 56.6% C 0.110 H 246.9°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#397BB3
RGB	rgb(57, 123, 179)
HSL	hsl(208, 52%, 46%)
HSV	hsv(208, 68%, 70%)
CMYK	cmyk(68.2%, 31.3%, 0%, 29.8%)
CIE-LAB	lab(49.84, -2.63, -35.76)
CIE-LCH	lch(49.84, 35.85, 265.79°)
OKLab	oklab(56.58% -0.0431 -0.1011)
OKLCH	oklch(56.58% 0.11 246.9)
XYZ	xyz(16.9039, 18.2887, 45.2783)
Luminance	0.1829 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#397BB3 #B37139

analogous

#39B3AE #397BB3 #393EB3

triadic

#397BB3 #B3397B #7BB339

tetradic

#397BB3 #AE39B3 #B37139 #3EB339

square

#397BB3 #AE39B3 #B37139 #3EB339

split-complementary

#397BB3 #B3393E #B3AE39

monochromatic

#1B3B56 #2A5B85 #397BB3 #5E99CC #8CB6DA

Accessibility & contrast

On white

4.51

#397BB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#397BB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #397BB3

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##397BB3	#FFFFFF	#000000	##000000
##397BB3	1.00	4.51	4.66	4.66
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#627DB5

Deuteranopia (green-blind)

#5171B2

Tritanopia (blue-blind)

#00888F

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #397bb3;
/* rgb */ color: rgb(57, 123, 179);
/* oklch */ color: oklch(56.6% 0.110 246.9);

Tailwind

colors: {
  custom: {
    50: '#7da0ca',
    500: '#397bb3',
    950: '#000000',
  },
}

SCSS

$custom: #397bb3;
$custom-light: #7da0ca;
$custom-dark: #000000;

JSON

{
  "hex": "#397bb3",
  "rgb": {
    "r": 57,
    "g": 123,
    "b": 179
  },
  "hsl": {
    "h": 207.541,
    "s": 51.695,
    "l": 46.275
  },
  "oklch": {
    "l": 0.5658,
    "c": 0.10992,
    "h": 246.9
  },
  "luminance": 0.1829
}

Semantic roles & 50–950 ramp

primary

#397BB3

secondary

#C5A183

accent

#8E4DDB

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #397BB3

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

Preview Lab → · Contrast checker → · Palette generator →