#3977B0#3977B0

#3977B0 is a mid, moderate cyan. Relative luminance 0.172; OKLCH L 55.5% C 0.110 H 248.7°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#3977B0
RGB	rgb(57, 119, 176)
HSL	hsl(209, 51%, 46%)
HSV	hsv(209, 68%, 69%)
CMYK	cmyk(67.6%, 32.4%, 0%, 31%)
CIE-LAB	lab(48.51, -1.29, -36.12)
CIE-LCH	lch(48.51, 36.15, 267.95°)
OKLab	oklab(55.48% -0.0398 -0.1022)
OKLCH	oklch(55.48% 0.11 248.7)
XYZ	xyz(16.1177, 17.1964, 43.5357)
Luminance	0.1720 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3977B0 #B07239

analogous

#39B0AD #3977B0 #393CB0

triadic

#3977B0 #B03977 #77B039

tetradic

#3977B0 #AD39B0 #B07239 #3CB039

square

#3977B0 #AD39B0 #B07239 #3CB039

split-complementary

#3977B0 #B0393C #B0AD39

monochromatic

#1B3854 #2A5882 #3977B0 #5C95CA #8AB3D9

Accessibility & contrast

On white

4.73

#3977B0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#3977B0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3977B0

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3977B0	#FFFFFF	#000000	##FFFFFF
##3977B0	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E79B2

Deuteranopia (green-blind)

#4D6EAF

Tritanopia (blue-blind)

#00848B

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3977b0;
/* rgb */ color: rgb(57, 119, 176);
/* oklch */ color: oklch(55.5% 0.110 248.7);

Tailwind

colors: {
  custom: {
    50: '#7c9ec8',
    500: '#3977b0',
    950: '#000000',
  },
}

SCSS

$custom: #3977b0;
$custom-light: #7c9ec8;
$custom-dark: #000000;

JSON

{
  "hex": "#3977b0",
  "rgb": {
    "r": 57,
    "g": 119,
    "b": 176
  },
  "hsl": {
    "h": 208.739,
    "s": 51.073,
    "l": 45.686
  },
  "oklch": {
    "l": 0.55479,
    "c": 0.10973,
    "h": 248.7
  },
  "luminance": 0.17198
}

Semantic roles & 50–950 ramp

primary

#3977B0

secondary

#C4A181

accent

#914DDB

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3977B0

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

Preview Lab → · Contrast checker → · Palette generator →