#377EB3#377EB3

#377EB3 is a mid, moderate cyan. Relative luminance 0.190; OKLCH L 57.2% C 0.108 H 244.0°. Best body text is #000000 at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#377EB3
RGB	rgb(55, 126, 179)
HSL	hsl(206, 53%, 46%)
HSV	hsv(206, 69%, 70%)
CMYK	cmyk(69.3%, 29.6%, 0%, 29.8%)
CIE-LAB	lab(50.67, -4.73, -34.46)
CIE-LCH	lch(50.67, 34.79, 262.19°)
OKLab	oklab(57.21% -0.0475 -0.0974)
OKLCH	oklch(57.21% 0.108 244)
XYZ	xyz(17.1700, 18.9868, 45.3990)
Luminance	0.1899 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377EB3 #B36C37

analogous

#37B3AA #377EB3 #3740B3

triadic

#377EB3 #B3377E #7EB337

tetradic

#377EB3 #AA37B3 #B36C37 #40B337

square

#377EB3 #AA37B3 #B36C37 #40B337

split-complementary

#377EB3 #B33740 #B3AA37

monochromatic

#1A3C55 #295D84 #377EB3 #5B9CCD #8AB8DB

Accessibility & contrast

On white

4.38

#377EB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.80

#377EB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377EB3

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377EB3	#FFFFFF	#000000	##000000
##377EB3	1.00	4.38	4.80	4.80
#FFFFFF	4.38	1.00	21.00	21.00
#000000	4.80	21.00	1.00	1.00
##000000	4.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#667FB5

Deuteranopia (green-blind)

#5573B2

Tritanopia (blue-blind)

#008B91

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #377eb3;
/* rgb */ color: rgb(55, 126, 179);
/* oklch */ color: oklch(57.2% 0.108 244.0);

Tailwind

colors: {
  custom: {
    50: '#7ca3ca',
    500: '#377eb3',
    950: '#000000',
  },
}

SCSS

$custom: #377eb3;
$custom-light: #7ca3ca;
$custom-dark: #000000;

JSON

{
  "hex": "#377eb3",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 179
  },
  "hsl": {
    "h": 205.645,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.57214,
    "c": 0.10831,
    "h": 244
  },
  "luminance": 0.18989
}

Semantic roles & 50–950 ramp

primary

#377EB3

secondary

#C59E81

accent

#894BDC

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #377EB3

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

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