#3977B3#3977B3

#3977B3 is a mid, moderate cyan. Relative luminance 0.173; OKLCH L 55.6% C 0.114 H 249.9°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3977B3
RGB	rgb(57, 119, 179)
HSL	hsl(210, 52%, 46%)
HSV	hsv(210, 68%, 70%)
CMYK	cmyk(68.2%, 33.5%, 0%, 29.8%)
CIE-LAB	lab(48.66, -0.23, -37.63)
CIE-LCH	lch(48.66, 37.63, 269.65°)
OKLab	oklab(55.65% -0.039 -0.1066)
OKLCH	oklch(55.65% 0.114 249.9)
XYZ	xyz(16.4178, 17.3165, 45.1163)
Luminance	0.1732 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3977B3 #B37539

analogous

#39B3B2 #3977B3 #393AB3

triadic

#3977B3 #B33977 #77B339

tetradic

#3977B3 #B239B3 #B37539 #3AB339

square

#3977B3 #B239B3 #B37539 #3AB339

split-complementary

#3977B3 #B3393A #B3B239

monochromatic

#1B3956 #2A5885 #3977B3 #5E96CC #8CB4DA

Accessibility & contrast

On white

4.70

#3977B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#3977B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3977B3

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3977B3	#FFFFFF	#000000	##FFFFFF
##3977B3	1.00	4.70	4.46	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.46	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C7AB6

Deuteranopia (green-blind)

#4B6EB2

Tritanopia (blue-blind)

#00858D

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3977b3;
/* rgb */ color: rgb(57, 119, 179);
/* oklch */ color: oklch(55.6% 0.114 249.9);

Tailwind

colors: {
  custom: {
    50: '#7d9dca',
    500: '#3977b3',
    950: '#000000',
  },
}

SCSS

$custom: #3977b3;
$custom-light: #7d9dca;
$custom-dark: #000000;

JSON

{
  "hex": "#3977b3",
  "rgb": {
    "r": 57,
    "g": 119,
    "b": 179
  },
  "hsl": {
    "h": 209.508,
    "s": 51.695,
    "l": 46.275
  },
  "oklch": {
    "l": 0.55646,
    "c": 0.11353,
    "h": 249.9
  },
  "luminance": 0.17318
}

Semantic roles & 50–950 ramp

primary

#3977B3

secondary

#C5A383

accent

#934DDB

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3977B3

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

Preview Lab → · Contrast checker → · Palette generator →