#377EB0#377EB0

#377EB0 is a mid, moderate cyan. Relative luminance 0.189; OKLCH L 57.1% C 0.105 H 242.5°. Best body text is #000000 at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#377EB0
RGB	rgb(55, 126, 176)
HSL	hsl(205, 52%, 45%)
HSV	hsv(205, 69%, 69%)
CMYK	cmyk(68.8%, 28.4%, 0%, 31%)
CIE-LAB	lab(50.53, -5.78, -32.95)
CIE-LCH	lch(50.53, 33.45, 260.05°)
OKLab	oklab(57.06% -0.0484 -0.093)
OKLCH	oklch(57.06% 0.105 242.5)
XYZ	xyz(16.8699, 18.8667, 43.8184)
Luminance	0.1887 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377EB0 #B06937

analogous

#37B0A5 #377EB0 #3742B0

triadic

#377EB0 #B0377E #7EB037

tetradic

#377EB0 #A537B0 #B06937 #42B037

square

#377EB0 #A537B0 #B06937 #42B037

split-complementary

#377EB0 #B03742 #B0A537

monochromatic

#1A3B53 #285D81 #377EB0 #599CCB #88B8DA

Accessibility & contrast

On white

4.40

#377EB0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.77

#377EB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377EB0

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377EB0	#FFFFFF	#000000	##000000
##377EB0	1.00	4.40	4.77	4.77
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.77	21.00	1.00	1.00
##000000	4.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#677FB2

Deuteranopia (green-blind)

#5773AF

Tritanopia (blue-blind)

#008A8F

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #377eb0;
/* rgb */ color: rgb(55, 126, 176);
/* oklch */ color: oklch(57.1% 0.105 242.5);

Tailwind

colors: {
  custom: {
    50: '#7ca3c8',
    500: '#377eb0',
    950: '#000000',
  },
}

SCSS

$custom: #377eb0;
$custom-light: #7ca3c8;
$custom-dark: #000000;

JSON

{
  "hex": "#377eb0",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 176
  },
  "hsl": {
    "h": 204.793,
    "s": 52.381,
    "l": 45.294
  },
  "oklch": {
    "l": 0.57056,
    "c": 0.10482,
    "h": 242.5
  },
  "luminance": 0.18869
}

Semantic roles & 50–950 ramp

primary

#377EB0

secondary

#C49B7F

accent

#874CDC

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #377EB0

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

Preview Lab → · Contrast checker → · Palette generator →