#397CCB#397CCB

#397CCB is a mid, vivid cyan. Relative luminance 0.196; OKLCH L 58.2% C 0.139 H 254.3°. Best body text is #000000 at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#397CCB
RGB	rgb(57, 124, 203)
HSL	hsl(212, 58%, 51%)
HSV	hsv(212, 72%, 80%)
CMYK	cmyk(71.9%, 38.9%, 0%, 20.4%)
CIE-LAB	lab(51.38, 5.34, -47.10)
CIE-LCH	lch(51.38, 47.40, 276.47°)
OKLab	oklab(58.18% -0.0376 -0.1343)
OKLCH	oklch(58.18% 0.139 254.3)
XYZ	xyz(19.6705, 19.5948, 59.2338)
Luminance	0.1960 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#397CCB #CB8839

analogous

#39C5CB #397CCB #3F39CB

triadic

#397CCB #CB397C #7CCB39

tetradic

#397CCB #CB39C5 #CB8839 #39CB3F

square

#397CCB #CB39C5 #CB8839 #39CB3F

split-complementary

#397CCB #CB3F39 #C5CB39

monochromatic

#1D416D #295F9D #397CCB #699CD8 #9ABCE4

Accessibility & contrast

On white

4.27

#397CCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.92

#397CCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #397CCB

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##397CCB	#FFFFFF	#000000	##000000
##397CCB	1.00	4.27	4.92	4.92
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.92	21.00	1.00	1.00
##000000	4.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5782CE

Deuteranopia (green-blind)

#4174C9

Tritanopia (blue-blind)

#008E9A

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #397ccb;
/* rgb */ color: rgb(57, 124, 203);
/* oklch */ color: oklch(58.2% 0.139 254.3);

Tailwind

colors: {
  custom: {
    50: '#81a1db',
    500: '#397ccb',
    950: '#000000',
  },
}

SCSS

$custom: #397ccb;
$custom-light: #81a1db;
$custom-dark: #000000;

JSON

{
  "hex": "#397ccb",
  "rgb": {
    "r": 57,
    "g": 124,
    "b": 203
  },
  "hsl": {
    "h": 212.466,
    "s": 58.4,
    "l": 50.98
  },
  "oklch": {
    "l": 0.58185,
    "c": 0.13945,
    "h": 254.3
  },
  "luminance": 0.19597
}

Semantic roles & 50–950 ramp

primary

#397CCB

secondary

#D0B390

accent

#9A46E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #397CCB

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

Preview Lab → · Contrast checker → · Palette generator →