#153F7B#153F7B

#153F7B is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.5% C 0.112 H 258.1°. Best body text is #FFFFFF at 10.35:1 contrast (WCAG AA passes).

Color values

HEX	#153F7B
RGB	rgb(21, 63, 123)
HSL	hsl(215, 71%, 28%)
HSV	hsv(215, 83%, 48%)
CMYK	cmyk(82.9%, 48.8%, 0%, 51.8%)
CIE-LAB	lab(27.14, 9.31, -38.22)
CIE-LCH	lch(27.14, 39.34, 283.69°)
OKLab	oklab(37.47% -0.0232 -0.1098)
OKLCH	oklch(37.47% 0.112 258.1)
XYZ	xyz(5.6606, 5.1438, 19.4296)
Luminance	0.0515 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#153F7B #7B5115

analogous

#15727B #153F7B #1E157B

triadic

#153F7B #7B153F #3F7B15

tetradic

#153F7B #7B1572 #7B5115 #157B1E

square

#153F7B #7B1572 #7B5115 #157B1E

split-complementary

#153F7B #7B1E15 #727B15

monochromatic

#040D1A #0C2447 #153F7B #1E5AAF #2F76DB

Accessibility & contrast

On white

10.35

#153F7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#153F7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #153F7B

10.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##153F7B	#FFFFFF	#000000	##FFFFFF
##153F7B	1.00	10.35	2.03	10.35
#FFFFFF	10.35	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E457D

Deuteranopia (green-blind)

#013C7A

Tritanopia (blue-blind)

#004D57

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #153f7b;
/* rgb */ color: rgb(21, 63, 123);
/* oklch */ color: oklch(37.5% 0.112 258.1);

Tailwind

colors: {
  custom: {
    50: '#6473a2',
    500: '#153f7b',
    950: '#000000',
  },
}

SCSS

$custom: #153f7b;
$custom-light: #6473a2;
$custom-dark: #000000;

JSON

{
  "hex": "#153f7b",
  "rgb": {
    "r": 21,
    "g": 63,
    "b": 123
  },
  "hsl": {
    "h": 215.294,
    "s": 70.833,
    "l": 28.235
  },
  "oklch": {
    "l": 0.37471,
    "c": 0.1122,
    "h": 258.1
  },
  "luminance": 0.05145
}

Semantic roles & 50–950 ramp

primary

#153F7B

secondary

#B0803B

accent

#A43AEE

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#06080F

muted

#7A7B7F

Preview Lab

Preview with #153F7B

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

Preview Lab → · Contrast checker → · Palette generator →