#377F9B#377F9B

#377F9B is a mid, moderate cyan. Relative luminance 0.184; OKLCH L 56.3% C 0.083 H 226.7°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#377F9B
RGB	rgb(55, 127, 155)
HSL	hsl(197, 48%, 41%)
HSV	hsv(197, 65%, 61%)
CMYK	cmyk(64.5%, 18.1%, 0%, 39.2%)
CIE-LAB	lab(49.93, -13.48, -21.69)
CIE-LCH	lch(49.93, 25.54, 238.13°)
OKLab	oklab(56.27% -0.057 -0.0606)
OKLCH	oklch(56.27% 0.083 226.7)
XYZ	xyz(15.0790, 18.3560, 33.7524)
Luminance	0.1836 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377F9B #9B5337

analogous

#379B85 #377F9B #374D9B

triadic

#377F9B #9B377F #7F9B37

tetradic

#377F9B #85379B #9B5337 #4D9B37

square

#377F9B #85379B #9B5337 #4D9B37

split-complementary

#377F9B #9B374D #9B8537

monochromatic

#173541 #275A6E #377F9B #4FA1C0 #7CB9D0

Accessibility & contrast

On white

4.50

#377F9B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.67

#377F9B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377F9B

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377F9B	#FFFFFF	#000000	##000000
##377F9B	1.00	4.50	4.67	4.67
#FFFFFF	4.50	1.00	21.00	21.00
#000000	4.67	21.00	1.00	1.00
##000000	4.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#707D9C

Deuteranopia (green-blind)

#62729B

Tritanopia (blue-blind)

#008788

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #377f9b;
/* rgb */ color: rgb(55, 127, 155);
/* oklch */ color: oklch(56.3% 0.083 226.7);

Tailwind

colors: {
  custom: {
    50: '#79a4b8',
    500: '#377f9b',
    950: '#000000',
  },
}

SCSS

$custom: #377f9b;
$custom-light: #79a4b8;
$custom-dark: #000000;

JSON

{
  "hex": "#377f9b",
  "rgb": {
    "r": 55,
    "g": 127,
    "b": 155
  },
  "hsl": {
    "h": 196.8,
    "s": 47.619,
    "l": 41.176
  },
  "oklch": {
    "l": 0.56274,
    "c": 0.08315,
    "h": 226.7
  },
  "luminance": 0.18358
}

Semantic roles & 50–950 ramp

primary

#377F9B

secondary

#BA8874

accent

#7651D7

background

#F7FAFB

surface

#EEF4F6

border

#C9CED0

text

#0A0F11

muted

#7C7F80

Preview Lab

Preview with #377F9B

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

Preview Lab → · Contrast checker → · Palette generator →