#155C8B#155C8B

#155C8B is a mid, moderate cyan. Relative luminance 0.097; OKLCH L 45.7% C 0.102 H 243.6°. Best body text is #FFFFFF at 7.15:1 contrast (WCAG AA passes).

Color values

HEX	#155C8B
RGB	rgb(21, 92, 139)
HSL	hsl(204, 74%, 31%)
HSV	hsv(204, 85%, 55%)
CMYK	cmyk(84.9%, 33.8%, 0%, 45.5%)
CIE-LAB	lab(37.26, -3.40, -31.98)
CIE-LCH	lch(37.26, 32.16, 263.93°)
OKLab	oklab(45.69% -0.0451 -0.0909)
OKLCH	oklch(45.69% 0.102 243.6)
XYZ	xyz(8.7948, 9.6767, 25.8254)
Luminance	0.0968 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#155C8B #8B4415

analogous

#158B7F #155C8B #15218B

triadic

#155C8B #8B155C #5C8B15

tetradic

#155C8B #7F158B #8B4415 #218B15

square

#155C8B #7F158B #8B4415 #218B15

split-complementary

#155C8B #8B1521 #8B7F15

monochromatic

#051621 #0D3956 #155C8B #1D7FC0 #399EE1

Accessibility & contrast

On white

7.15

#155C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.94

#155C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #155C8B

7.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##155C8B	#FFFFFF	#000000	##FFFFFF
##155C8B	1.00	7.15	2.94	7.15
#FFFFFF	7.15	1.00	21.00	1.00
#000000	2.94	21.00	1.00	21.00
##FFFFFF	7.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#465D8D

Deuteranopia (green-blind)

#35538A

Tritanopia (blue-blind)

#00686D

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #155c8b;
/* rgb */ color: rgb(21, 92, 139);
/* oklch */ color: oklch(45.7% 0.102 243.6);

Tailwind

colors: {
  custom: {
    50: '#6889ad',
    500: '#155c8b',
    950: '#000000',
  },
}

SCSS

$custom: #155c8b;
$custom-light: #6889ad;
$custom-dark: #000000;

JSON

{
  "hex": "#155c8b",
  "rgb": {
    "r": 21,
    "g": 92,
    "b": 139
  },
  "hsl": {
    "h": 203.898,
    "s": 73.75,
    "l": 31.373
  },
  "oklch": {
    "l": 0.45692,
    "c": 0.1015,
    "h": 243.6
  },
  "luminance": 0.09678
}

Semantic roles & 50–950 ramp

primary

#155C8B

secondary

#BF713D

accent

#8137F0

background

#F6F8FA

surface

#ECF0F4

border

#C7CBCE

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #155C8B

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

Preview Lab → · Contrast checker → · Palette generator →