#377EB5#377EB5

#377EB5 is a mid, moderate cyan. Relative luminance 0.191; OKLCH L 57.3% C 0.111 H 245.0°. Best body text is #000000 at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#377EB5
RGB	rgb(55, 126, 181)
HSL	hsl(206, 53%, 46%)
HSV	hsv(206, 70%, 71%)
CMYK	cmyk(69.6%, 30.4%, 0%, 29%)
CIE-LAB	lab(50.77, -4.03, -35.47)
CIE-LCH	lch(50.77, 35.69, 263.52°)
OKLab	oklab(57.32% -0.0468 -0.1003)
OKLCH	oklch(57.32% 0.111 245)
XYZ	xyz(17.3737, 19.0683, 46.4720)
Luminance	0.1907 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377EB5 #B56E37

analogous

#37B5AD #377EB5 #373FB5

triadic

#377EB5 #B5377E #7EB537

tetradic

#377EB5 #AD37B5 #B56E37 #3FB537

square

#377EB5 #AD37B5 #B56E37 #3FB537

split-complementary

#377EB5 #B5373F #B5AD37

monochromatic

#1A3D57 #295D86 #377EB5 #5C9CCD #8BB8DC

Accessibility & contrast

On white

4.36

#377EB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.81

#377EB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377EB5

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377EB5	#FFFFFF	#000000	##000000
##377EB5	1.00	4.36	4.81	4.81
#FFFFFF	4.36	1.00	21.00	21.00
#000000	4.81	21.00	1.00	1.00
##000000	4.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6580B7

Deuteranopia (green-blind)

#5473B4

Tritanopia (blue-blind)

#008B91

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #377eb5;
/* rgb */ color: rgb(55, 126, 181);
/* oklch */ color: oklch(57.3% 0.111 245.0);

Tailwind

colors: {
  custom: {
    50: '#7ca3cb',
    500: '#377eb5',
    950: '#000000',
  },
}

SCSS

$custom: #377eb5;
$custom-light: #7ca3cb;
$custom-dark: #000000;

JSON

{
  "hex": "#377eb5",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 181
  },
  "hsl": {
    "h": 206.19,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.5732,
    "c": 0.11068,
    "h": 245
  },
  "luminance": 0.1907
}

Semantic roles & 50–950 ramp

primary

#377EB5

secondary

#C6A082

accent

#8B4BDD

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #377EB5

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

Preview Lab → · Contrast checker → · Palette generator →