#3977B7#3977B7

#3977B7 is a mid, moderate cyan. Relative luminance 0.175; OKLCH L 55.9% C 0.119 H 251.4°. Best body text is #FFFFFF at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#3977B7
RGB	rgb(57, 119, 183)
HSL	hsl(210, 53%, 47%)
HSV	hsv(210, 69%, 72%)
CMYK	cmyk(68.9%, 35%, 0%, 28.2%)
CIE-LAB	lab(48.86, 1.19, -39.62)
CIE-LCH	lch(48.86, 39.64, 271.72°)
OKLab	oklab(55.87% -0.0379 -0.1124)
OKLCH	oklch(55.87% 0.119 251.4)
XYZ	xyz(16.8282, 17.4806, 47.2778)
Luminance	0.1748 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3977B7 #B77939

analogous

#39B6B7 #3977B7 #3A39B7

triadic

#3977B7 #B73977 #77B739

tetradic

#3977B7 #B739B6 #B77939 #39B73A

square

#3977B7 #B739B6 #B77939 #39B73A

split-complementary

#3977B7 #B73A39 #B6B739

monochromatic

#1C3A5A #2A5988 #3977B7 #6096CD #8EB5DC

Accessibility & contrast

On white

4.67

#3977B7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.50

#3977B7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3977B7

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3977B7	#FFFFFF	#000000	##FFFFFF
##3977B7	1.00	4.67	4.50	4.67
#FFFFFF	4.67	1.00	21.00	1.00
#000000	4.50	21.00	1.00	21.00
##FFFFFF	4.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A7BBA

Deuteranopia (green-blind)

#496FB6

Tritanopia (blue-blind)

#00868E

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3977b7;
/* rgb */ color: rgb(57, 119, 183);
/* oklch */ color: oklch(55.9% 0.119 251.4);

Tailwind

colors: {
  custom: {
    50: '#7d9dcd',
    500: '#3977b7',
    950: '#000000',
  },
}

SCSS

$custom: #3977b7;
$custom-light: #7d9dcd;
$custom-dark: #000000;

JSON

{
  "hex": "#3977b7",
  "rgb": {
    "r": 57,
    "g": 119,
    "b": 183
  },
  "hsl": {
    "h": 210.476,
    "s": 52.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.55873,
    "c": 0.11865,
    "h": 251.4
  },
  "luminance": 0.17482
}

Semantic roles & 50–950 ramp

primary

#3977B7

secondary

#C7A685

accent

#954CDC

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3977B7

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

Preview Lab → · Contrast checker → · Palette generator →