#377FD8#377FD8

#377FD8 is a mid, vivid cyan. Relative luminance 0.209; OKLCH L 59.6% C 0.154 H 255.4°. Best body text is #000000 at 5.19:1 contrast (WCAG AA passes).

Color values

HEX	#377FD8
RGB	rgb(55, 127, 216)
HSL	hsl(213, 67%, 53%)
HSV	hsv(213, 75%, 85%)
CMYK	cmyk(74.5%, 41.2%, 0%, 15.3%)
CIE-LAB	lab(52.89, 7.97, -52.06)
CIE-LCH	lch(52.89, 52.67, 278.70°)
OKLab	oklab(59.58% -0.0387 -0.1488)
OKLCH	oklch(59.58% 0.154 255.4)
XYZ	xyz(21.5550, 20.9464, 67.8595)
Luminance	0.2095 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377FD8 #D89037

analogous

#37CFD8 #377FD8 #3F37D8

triadic

#377FD8 #D8377F #7FD837

tetradic

#377FD8 #D837CF #D89037 #37D83F

square

#377FD8 #D837CF #D89037 #37D83F

split-complementary

#377FD8 #D83F37 #CFD837

monochromatic

#18457C #2261B0 #377FD8 #6AA0E2 #9DC1EC

Accessibility & contrast

On white

4.05

#377FD8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.19

#377FD8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377FD8

5.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377FD8	#FFFFFF	#000000	##000000
##377FD8	1.00	4.05	5.19	5.19
#FFFFFF	4.05	1.00	21.00	21.00
#000000	5.19	21.00	1.00	1.00
##000000	5.19	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5486DC

Deuteranopia (green-blind)

#3877D6

Tritanopia (blue-blind)

#0094A1

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #377fd8;
/* rgb */ color: rgb(55, 127, 216);
/* oklch */ color: oklch(59.6% 0.154 255.4);

Tailwind

colors: {
  custom: {
    50: '#83a3e4',
    500: '#377fd8',
    950: '#000000',
  },
}

SCSS

$custom: #377fd8;
$custom-light: #83a3e4;
$custom-dark: #000000;

JSON

{
  "hex": "#377fd8",
  "rgb": {
    "r": 55,
    "g": 127,
    "b": 216
  },
  "hsl": {
    "h": 213.168,
    "s": 67.364,
    "l": 53.137
  },
  "oklch": {
    "l": 0.59581,
    "c": 0.15375,
    "h": 255.4
  },
  "luminance": 0.20949
}

Semantic roles & 50–950 ramp

primary

#377FD8

secondary

#D8B993

accent

#9D3EEA

background

#F8FAFE

surface

#F0F3FC

border

#CBCDD5

text

#0C0F16

muted

#7D7F84

Preview Lab

Preview with #377FD8

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

Preview Lab → · Contrast checker → · Palette generator →