#3977B4#3977B4

#3977B4 is a mid, moderate cyan. Relative luminance 0.174; OKLCH L 55.7% C 0.115 H 250.3°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3977B4
RGB	rgb(57, 119, 180)
HSL	hsl(210, 52%, 46%)
HSV	hsv(210, 68%, 71%)
CMYK	cmyk(68.3%, 33.9%, 0%, 29.4%)
CIE-LAB	lab(48.71, 0.12, -38.13)
CIE-LCH	lch(48.71, 38.13, 270.19°)
OKLab	oklab(55.7% -0.0387 -0.1081)
OKLCH	oklch(55.7% 0.115 250.3)
XYZ	xyz(16.5193, 17.3571, 45.6508)
Luminance	0.1736 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3977B4 #B47639

analogous

#39B4B4 #3977B4 #393AB4

triadic

#3977B4 #B43977 #77B439

tetradic

#3977B4 #B439B4 #B47639 #3AB439

square

#3977B4 #B439B4 #B47639 #3AB439

split-complementary

#3977B4 #B4393A #B4B439

monochromatic

#1C3A57 #2A5886 #3977B4 #5E96CC #8DB4DB

Accessibility & contrast

On white

4.70

#3977B4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#3977B4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3977B4

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3977B4	#FFFFFF	#000000	##FFFFFF
##3977B4	1.00	4.70	4.47	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C7AB7

Deuteranopia (green-blind)

#4B6EB3

Tritanopia (blue-blind)

#00858D

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3977b4;
/* rgb */ color: rgb(57, 119, 180);
/* oklch */ color: oklch(55.7% 0.115 250.3);

Tailwind

colors: {
  custom: {
    50: '#7d9dcb',
    500: '#3977b4',
    950: '#000000',
  },
}

SCSS

$custom: #3977b4;
$custom-light: #7d9dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#3977b4",
  "rgb": {
    "r": 57,
    "g": 119,
    "b": 180
  },
  "hsl": {
    "h": 209.756,
    "s": 51.899,
    "l": 46.471
  },
  "oklch": {
    "l": 0.55702,
    "c": 0.11481,
    "h": 250.3
  },
  "luminance": 0.17359
}

Semantic roles & 50–950 ramp

primary

#3977B4

secondary

#C5A483

accent

#934CDB

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3977B4

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

Preview Lab → · Contrast checker → · Palette generator →