#377EB2#377EB2

#377EB2 is a mid, moderate cyan. Relative luminance 0.189; OKLCH L 57.2% C 0.107 H 243.5°. Best body text is #000000 at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#377EB2
RGB	rgb(55, 126, 178)
HSL	hsl(205, 53%, 46%)
HSV	hsv(205, 69%, 70%)
CMYK	cmyk(69.1%, 29.2%, 0%, 30.2%)
CIE-LAB	lab(50.62, -5.08, -33.96)
CIE-LCH	lch(50.62, 34.34, 261.49°)
OKLab	oklab(57.16% -0.0478 -0.0959)
OKLCH	oklch(57.16% 0.107 243.5)
XYZ	xyz(17.0692, 18.9465, 44.8683)
Luminance	0.1895 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377EB2 #B26B37

analogous

#37B2A8 #377EB2 #3740B2

triadic

#377EB2 #B2377E #7EB237

tetradic

#377EB2 #A837B2 #B26B37 #40B237

square

#377EB2 #A837B2 #B26B37 #40B237

split-complementary

#377EB2 #B23740 #B2A837

monochromatic

#1A3C54 #295D83 #377EB2 #5A9CCC #89B8DB

Accessibility & contrast

On white

4.38

#377EB2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.79

#377EB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377EB2

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377EB2	#FFFFFF	#000000	##000000
##377EB2	1.00	4.38	4.79	4.79
#FFFFFF	4.38	1.00	21.00	21.00
#000000	4.79	21.00	1.00	1.00
##000000	4.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#667FB4

Deuteranopia (green-blind)

#5673B1

Tritanopia (blue-blind)

#008B90

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #377eb2;
/* rgb */ color: rgb(55, 126, 178);
/* oklch */ color: oklch(57.2% 0.107 243.5);

Tailwind

colors: {
  custom: {
    50: '#7ca3c9',
    500: '#377eb2',
    950: '#000000',
  },
}

SCSS

$custom: #377eb2;
$custom-light: #7ca3c9;
$custom-dark: #000000;

JSON

{
  "hex": "#377eb2",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 178
  },
  "hsl": {
    "h": 205.366,
    "s": 52.79,
    "l": 45.686
  },
  "oklch": {
    "l": 0.57161,
    "c": 0.10714,
    "h": 243.5
  },
  "luminance": 0.18948
}

Semantic roles & 50–950 ramp

primary

#377EB2

secondary

#C59D80

accent

#894CDC

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #377EB2

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

Preview Lab → · Contrast checker → · Palette generator →