#377EB9#377EB9

#377EB9 is a mid, moderate cyan. Relative luminance 0.192; OKLCH L 57.5% C 0.115 H 246.7°. Best body text is #000000 at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#377EB9
RGB	rgb(55, 126, 185)
HSL	hsl(207, 54%, 47%)
HSV	hsv(207, 70%, 73%)
CMYK	cmyk(70.3%, 31.9%, 0%, 27.5%)
CIE-LAB	lab(50.96, -2.61, -37.46)
CIE-LCH	lch(50.96, 37.56, 266.01°)
OKLab	oklab(57.54% -0.0456 -0.1061)
OKLCH	oklch(57.54% 0.115 246.7)
XYZ	xyz(17.7900, 19.2348, 48.6646)
Luminance	0.1924 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377EB9 #B97237

analogous

#37B9B3 #377EB9 #373DB9

triadic

#377EB9 #B9377E #7EB937

tetradic

#377EB9 #B337B9 #B97237 #3DB937

square

#377EB9 #B337B9 #B97237 #3DB937

split-complementary

#377EB9 #B9373D #B9B337

monochromatic

#1B3E5B #295E8A #377EB9 #5E9CCF #8DB9DD

Accessibility & contrast

On white

4.33

#377EB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.85

#377EB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377EB9

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377EB9	#FFFFFF	#000000	##000000
##377EB9	1.00	4.33	4.85	4.85
#FFFFFF	4.33	1.00	21.00	21.00
#000000	4.85	21.00	1.00	1.00
##000000	4.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6380BC

Deuteranopia (green-blind)

#5174B8

Tritanopia (blue-blind)

#008C93

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #377eb9;
/* rgb */ color: rgb(55, 126, 185);
/* oklch */ color: oklch(57.5% 0.115 246.7);

Tailwind

colors: {
  custom: {
    50: '#7da3ce',
    500: '#377eb9',
    950: '#000000',
  },
}

SCSS

$custom: #377eb9;
$custom-light: #7da3ce;
$custom-dark: #000000;

JSON

{
  "hex": "#377eb9",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 185
  },
  "hsl": {
    "h": 207.231,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.57537,
    "c": 0.11548,
    "h": 246.7
  },
  "luminance": 0.19237
}

Semantic roles & 50–950 ramp

primary

#377EB9

secondary

#C8A384

accent

#8D4ADE

background

#F8FAFC

surface

#EFF3F9

border

#CACDD2

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #377EB9

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

Preview Lab → · Contrast checker → · Palette generator →